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Iago angustidens (21)
(Cappetta, 1973)
Synonyms: Triakis angustidens
Original description species: (Cappetta, 1973)
Genus: Iago Compagno & Springer, 1971
Family: Triakidae Gray, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iago carlaluisai (2)
Leder, 2013
Original description species: Leder, 2013
Genus: Iago Compagno & Springer, 1971
Family: Triakidae Gray, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iago costamagnai (6)
(Cappetta & Nolf, 1991)
Synonyms: Triakis aff. costamagnai, Triakis cf. costamagnai, Triakis costamagnai
Original description species: (Cappetta & Nolf, 1991)
Genus: Iago Compagno & Springer, 1971
Family: Triakidae Gray, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iago sp-f (10)

Genus: Iago Compagno & Springer, 1971
Family: Triakidae Gray, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iansan beurleni (10)
(Santos, 1968)
Synonyms: Rhinobatos beurleni
Original description species: (Santos, 1968)
Genus: Iansan Brito & Seret, 1996
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iberolepis aragonensis (2)
Mader, 1986
Original description species: Mader, 1986
Genus: Iberolepis Mader, 1986
Subclass: Elasmobranchii
Iberolepis sp. (1)

Genus: Iberolepis Mader, 1986
Subclass: Elasmobranchii
Iberotrygon plagiolophus (1)
Kriwet, Nunn & Klug, 2009
Original description species: Kriwet, Nunn & Klug, 2009
Genus: Iberotrygon Kriwet, Nunn & Klug, 2009
Family: incert. fam.
Order: Sclerorhynchiformes
Superorder: Pristiorajea
Subclass: Elasmobranchii
Icanodus limitaris (1)
(St. John & Worthen, 1883)
Original description species: (St. John & Worthen, 1883)
Genus: Icanodus Miller, 1892
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali
Idiacanthus bellistriatus (1)
Gunnell, 1933
Valid name: Gunnellodus bellistriatus
Valid name: Gunnellodus bellistriatus
Original description species: Gunnell, 1933
Genus: Idiacanthus Gunnell, 1933
Subclass: Elasmobranchii
Idiacanthus cameratus (1)
Gunnell, 1933
Valid name: Gunnellodus bellistriatus
Valid name: Gunnellodus bellistriatus
Original description species: Gunnell, 1933
Genus: Idiacanthus Gunnell, 1933
Subclass: Elasmobranchii
Idiacanthus sp. (1)

Genus: Idiacanthus Gunnell, 1933
Subclass: Elasmobranchii
Idiacanthus trispinosus (1)
Gunnell, 1933
Valid name: Gunnellodus bellistriatus
Valid name: Gunnellodus bellistriatus
Original description species: Gunnell, 1933
Genus: Idiacanthus Gunnell, 1933
Subclass: Elasmobranchii
Iekelotodus trigonalis (1)
(Jaekel, 1895)
Valid name: Jaekelotodus trigonalis
Valid name: Jaekelotodus trigonalis
Original description species: (Jaekel, 1895)
Genus: Iekelotodus Menner, 1928
Family: Odontaspididae Müller & Henle, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Igdabatis cf. indicus (2)
Prasad & Cappetta, 1993
Valid name: Igdabatis indicus
Valid name: Igdabatis indicus
Original description species: Prasad & Cappetta, 1993
Genus: Igdabatis Cappetta, 1972
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Igdabatis cf. sigmodon (1)
Cappetta, 1972
Valid name: Igdabatis sigmodon
Valid name: Igdabatis sigmodon
Original description species: Cappetta, 1972
Genus: Igdabatis Cappetta, 1972
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Igdabatis indicus (11)
Prasad & Cappetta, 1993
Synonyms: Igdabatis cf. indicus
Original description species: Prasad & Cappetta, 1993
Genus: Igdabatis Cappetta, 1972
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Igdabatis marmii (2)
Blanco, 2019
Original description species: Blanco, 2019
Genus: Igdabatis Cappetta, 1972
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Igdabatis sigmodon (6)
Cappetta, 1972
Synonyms: Igdabatis cf. sigmodon
Original description species: Cappetta, 1972
Genus: Igdabatis Cappetta, 1972
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ikamauius ensifer (7)
(Davis, 1888)
Synonyms: Pristiophorus ensifer, Trygon ensifer
Original description species: (Davis, 1888)
Genus: Ikamauius Keyes, 1979
Family: Pristiophoridae Bleeker, 1859
Order: Pristiophoriformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Incognitorapax fernsebneri (2)
Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner, Beaury & Guinot, 2024
Original description species: Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner, Beaury & Guinot, 2024
Genus: Incognitorapax Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner, Beaury & Guinot, 2024
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iniopera cf. richardsoni (1)
Zangerl & Case, 1973
Valid name: Iniopera richardsoni
Valid name: Iniopera richardsoni
Original description species: Zangerl & Case, 1973
Genus: Iniopera Zangerl & Case, 1973
Family: Sibyrhynchidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Iniopera richardsoni (4)
Zangerl & Case, 1973
Synonyms: Iniopera cf. richardsoni
Original description species: Zangerl & Case, 1973
Genus: Iniopera Zangerl & Case, 1973
Family: Sibyrhynchidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Iniopera sp. (4)

Genus: Iniopera Zangerl & Case, 1973
Family: Sibyrhynchidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Iniopteryx cf. rushlaui (1)
Zangerl & Case, 1973
Valid name: Iniopteryx rushlaui
Valid name: Iniopteryx rushlaui
Original description species: Zangerl & Case, 1973
Genus: Iniopteryx Zangerl & Case, 1973
Family: Iniopterygidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Iniopteryx rushlaui (6)
Zangerl & Case, 1973
Synonyms: Iniopteryx cf. rushlaui
Original description species: Zangerl & Case, 1973
Genus: Iniopteryx Zangerl & Case, 1973
Family: Iniopterygidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Iniopteryx tedwhitei (2)
Zangerl & Case, 1973
Original description species: Zangerl & Case, 1973
Genus: Iniopteryx Zangerl & Case, 1973
Family: Iniopterygidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Inioxyele whitei (2)
Zangerl & Case, 1973
Original description species: Zangerl & Case, 1973
Genus: Inioxyele Zangerl & Case, 1973
Family: Sibyrhynchidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali
Isacrodus marthae (3)
Ivanov, Nestell & Nestell, 2012
Original description species: Ivanov, Nestell & Nestell, 2012
Genus: Isacrodus Ivanov, Nestell & Nestell, 2012
Family: Jalodontidae Ginter, Hairapetian & Klug, 2002
Order: Jalodontiformes
Subclass: Elasmobranchii
Isacrodus sp. (1)

Genus: Isacrodus Ivanov, Nestell & Nestell, 2012
Family: Jalodontidae Ginter, Hairapetian & Klug, 2002
Order: Jalodontiformes
Subclass: Elasmobranchii
Isanodus nongbualamphuensis (1)
Khamha, Cuny & Lauprasert, 2016
Original description species: Khamha, Cuny & Lauprasert, 2016
Genus: Isanodus Cuny, Suteethorn, Kamha, Buffetaut & Philippe, 2006
Family: fam. indet
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Isanodus paladeji (10)
Cuny, Suteethorn, Kamha, Buffetaut & Philippe, 2006
Original description species: Cuny, Suteethorn, Kamha, Buffetaut & Philippe, 2006
Genus: Isanodus Cuny, Suteethorn, Kamha, Buffetaut & Philippe, 2006
Family: fam. indet
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Isanodus sp. (1)

Genus: Isanodus Cuny, Suteethorn, Kamha, Buffetaut & Philippe, 2006
Family: fam. indet
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Ischirhiza nigeriensis (2)
(Tabaste, 1963)
Valid name: Ischyrhiza nigeriensis
Valid name: Ischyrhiza nigeriensis
Original description species: (Tabaste, 1963)
Genus: Ischirhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyodon agassizii (3)
(Buckland, 1835)
Valid name: Edaphodon agassizi
Valid name: Edaphodon agassizi
Original description species: (Buckland, 1835)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon beaumontii (2)
(Egerton, 1843)
Valid name: Ischyodus beaumonti
Valid name: Ischyodus beaumonti
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon brevirostris (2)
(Agassiz, 1843)
Valid name: Ischyodus thurmanni
Valid name: Ischyodus thurmanni
Original description species: (Agassiz, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon bucklandii (2)
(Egerton, 1843)
Valid name: Chimaera bucklandi
Valid name: Chimaera bucklandi
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon dufrenoyi (1)
(Egerton, 1843)
Valid name: Ischyodus dufrenoyi
Valid name: Ischyodus dufrenoyi
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon dufrenoyii (1)
(Egerton, 1843)
Valid name: Ischyodus dufrenoyi
Valid name: Ischyodus dufrenoyi
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon dutertrei (1)
Egerton, 1843
Valid name: Ischyodus dutertrei
Valid name: Ischyodus dutertrei
Original description species: Egerton, 1843
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon dutertrii (1)
Egerton, 1843
Valid name: Ischyodus dutertrei
Valid name: Ischyodus dutertrei
Original description species: Egerton, 1843
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon egertoni (1)
(Buckland, 1835)
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: (Buckland, 1835)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon egertonii (1)
(Buckland, 1835)
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: (Buckland, 1835)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon emarginata (1)
(Egerton, 1843)
Valid name: Ischyodus emarginatus
Valid name: Ischyodus emarginatus
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon emarginatus (1)
(Egerton, 1843)
Valid name: Ischyodus emarginatus
Valid name: Ischyodus emarginatus
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon helvetica (2)
(Egerton, 1843)
Valid name: Chimaera helvetica
Valid name: Chimaera helvetica
Original description species: (Egerton, 1843)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon johnsonii (2)
Agassiz, 1843
Valid name: Ischyodus johnsoni
Valid name: Ischyodus johnsoni
Original description species: Agassiz, 1843
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon minor (1)
Rogovich, 1861
Original description species: Rogovich, 1861
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon tessonii (2)
Buckland, 1843
Valid name: Ischyodus emarginatus
Valid name: Ischyodus emarginatus
Original description species: Buckland, 1843
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon townsendii (1)
(Buckland, 1835)
Valid name: Ischyodus townsendi
Valid name: Ischyodus townsendi
Original description species: (Buckland, 1835)
Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon towsendii (1)

Genus: Ischyodon
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus aalensis (2)
(Quenstedt, 1858)
Valid name: Psilacanthus aalensis
Valid name: Psilacanthus aalensis
Original description species: (Quenstedt, 1858)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus acutus (3)
Von Meyer, 1859
Synonyms: Ischyodus cf. acutus, Ischyodus (Chimaera) acutus
Original description species: Von Meyer, 1859
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus aff. bifurcatus (1)
Case, 1978
Valid name: Ischyodus bifurcatus
Valid name: Ischyodus bifurcatus
Original description species: Case, 1978
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus agassizi (1)
(Buckland, 1835)
Valid name: Edaphodon agassizi
Valid name: Edaphodon agassizi
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus avita (1)
(Von Meyer, 1862)
Valid name: Elasmodectes avitus
Valid name: Elasmodectes avitus
Original description species: (Von Meyer, 1862)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus avitus (5)
(Von Meyer, 1862)
Valid name: Elasmodectes avitus
Valid name: Elasmodectes avitus
Original description species: (Von Meyer, 1862)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus beaugrandi (2)
Sauvage, 1867
Original description species: Sauvage, 1867
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus beaumonti (14)
(Egerton, 1843)
Synonyms: Chimaera beaumonti, Chimaera (Ischyodon) beaumontii, Ischyodon beaumontii, Ischyodus beaumontii, Ischyodus cf. beaumonti, Ischyodus rigauxi
Original description species: (Egerton, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus beaumontii (2)
(Egerton, 1843)
Valid name: Ischyodus beaumonti
Valid name: Ischyodus beaumonti
Original description species: (Egerton, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus bifurcatus (15)
Case, 1978
Synonyms: Ischyodus aff. bifurcatus, Ischyodus cf. bifurcatus
Original description species: Case, 1978
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus bohemicus (1)
Bayer, 1905
Original description species: Bayer, 1905
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus bouchardi (1)
Sauvage, 1867
Valid name: Ischyodus thurmanni
Valid name: Ischyodus thurmanni
Original description species: Sauvage, 1867
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus brevirostris (5)
(Agassiz, 1843)
Valid name: Ischyodus thurmanni
Valid name: Ischyodus thurmanni
Original description species: (Agassiz, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. acutus (1)
Von Meyer, 1859
Valid name: Ischyodus acutus
Valid name: Ischyodus acutus
Original description species: Von Meyer, 1859
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. beaumonti (1)
(Egerton, 1843)
Valid name: Ischyodus beaumonti
Valid name: Ischyodus beaumonti
Original description species: (Egerton, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. bifurcatus (1)
Case, 1978
Valid name: Ischyodus bifurcatus
Valid name: Ischyodus bifurcatus
Original description species: Case, 1978
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. brevirostris (1)
(Agassiz, 1843)
Valid name: Ischyodus thurmanni
Valid name: Ischyodus thurmanni
Original description species: (Agassiz, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. dolloi (2)
Leriche, 1902
Valid name: Ischyodus dolloi
Valid name: Ischyodus dolloi
Original description species: Leriche, 1902
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. egertoni (2)
(Buckland, 1835)
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. schuebleri (1)
Quenstedt, 1858
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: Quenstedt, 1858
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. thurmanni (1)
Picet & Campiche, 1858
Valid name: Ischyodus thurmanni
Valid name: Ischyodus thurmanni
Original description species: Picet & Campiche, 1858
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. townsendi (1)
(Buckland, 1835)
Valid name: Ischyodus townsendi
Valid name: Ischyodus townsendi
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus colei (9)
(Agassiz, 1843)
Synonyms: Chimaera (Ganodus) colei, Ganodus colei
Original description species: (Agassiz, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus crassus (3)
(Woodward & Withe, 1930)
Synonyms: Callorhinchus crassus, Callorhynchus crassus
Original description species: (Woodward & Withe, 1930)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus curvidens (17)
(Egerton, 1843)
Synonyms: Chimaera curvidens, Chimaera neglecta, Chimaera (Ganodus) curvidens, Chimaera (Ganodus) neglecta, Ganodus curvidens, Ganodus dentatus, Ganodus neglectus, Ischyodus neglectus
Original description species: (Egerton, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus divaricatus (2)
Cope, 1869
Original description species: Cope, 1869
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dolloi (22)
Leriche, 1902
Synonyms: Ischyodus cf. dolloi, Ischyodus zinsmeisteri
Original description species: Leriche, 1902
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dufrenoyi (7)
(Egerton, 1843)
Synonyms: Chimaera dufrenoyi, Chimaera (Ischyodon) dufrenoyi, Ischyodon dufrenoyi, Ischyodon dufrenoyii
Original description species: (Egerton, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dutertrei (6)
Egerton, 1843
Synonyms: Chimaera (Ischyodon) dutertrii, Ischyodon dutertrei, Ischyodon dutertrii
Original description species: Egerton, 1843
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus egertoni (31)
(Buckland, 1835)
Synonyms: Chimaera egertoni, Chimaera egertonii, Chimaera schübleri, Chimaera (Ischyodon) egertoni, Ischyodon egertoni, Ischyodon egertonii, Ischyodus cf. egertoni, Ischyodus cf. schuebleri, Ischyodus sauvagei, Ischyodus schübleri, Ischyodus schuebleri, Ischyodus suevicus, Ischyodus suprajurensis
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus emarginatus (25)
(Egerton, 1843)
Synonyms: Chimaera emarginata, Chimaera (Ischyodon) emarginata, Chimaera (Ischyodon) tessoni, Ganodus emarginatus, Ganodus oweni, Ischyodon emarginata, Ischyodon emarginatus, Ischyodon tessonii, Ischyodus tessoni, Leptacanthus serratus
Original description species: (Egerton, 1843)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus eocaenus (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus fecundus (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus ferrugineus (2)
Riess, 1887
Synonyms: Aletodus ferrugines
Original description species: Riess, 1887
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus gaskillii (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus incisus (4)
Newton, 1878
Original description species: Newton, 1878
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus incrassatus (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus johnsoni (4)
Agassiz, 1843
Synonyms: Ischyodon johnsonii
Original description species: Agassiz, 1843
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus laterigerus (2)
Cope, 1869
Original description species: Cope, 1869
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus latus (1)
Newton, 1878
Original description species: Newton, 1878
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus longirostris (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus lonzeensis (1)
Leriche
Original description species: Leriche
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus miersii (1)
(Marsh, 1869)
Original description species: (Marsh, 1869)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus mirificus (1)
(Leidy, 1856)
Valid name: Edaphodon mirificus
Valid name: Edaphodon mirificus
Original description species: (Leidy, 1856)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus monolophus (2)
Cope, 1869
Original description species: Cope, 1869
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus mortoni (4)
Chapman & Pritchard, 1907
Original description species: Chapman & Pritchard, 1907
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus obruchevi (1)
Averianov, 1992
Original description species: Averianov, 1992
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus orthorhinus (1)
Egerton, 1871
Valid name: Myriacanthus granulatus
Valid name: Myriacanthus granulatus
Original description species: Egerton, 1871
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus personati (3)
(Quenstedt, 1858)
Synonyms: Chimaera personati
Original description species: (Quenstedt, 1858)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus planus (4)
Newton, 1878
Synonyms: Elasmodus planus
Original description species: Newton, 1878
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus quenstedti (10)
(Wagner, 1857)
Synonyms: Chimaera (Ischyodon) quenstedti
Original description species: (Wagner, 1857)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus rayhaasi (3)
Hoganson & Erickson, 2005
Original description species: Hoganson & Erickson, 2005
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus rigauxi (2)
Sauvage, 1867
Valid name: Ischyodus beaumonti
Valid name: Ischyodus beaumonti
Original description species: Sauvage, 1867
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus rostratus (2)
Von Meyer, 1859
Synonyms: Ischyodus (Chimaera) rostratus
Original description species: Von Meyer, 1859
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus sauvagei (2)
Hamy, 1866
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: Hamy, 1866
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus schübleri (2)
Quenstedt, 1858
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: Quenstedt, 1858
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus schuebleri (2)
Quenstedt, 1858
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: Quenstedt, 1858
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus smockii (2)
Cope, 1869
Original description species: Cope, 1869
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus solidulus (1)
Cope, 1869
Original description species: Cope, 1869
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus sp. (27)

Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus stenobryus (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus suevicus (2)
Philippi, 1897
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: Philippi, 1897
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus suprajurensis (2)
Sauvage, 1867
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: Sauvage, 1867
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus tessoni (1)
Buckland, 1843
Valid name: Ischyodus emarginatus
Valid name: Ischyodus emarginatus
Original description species: Buckland, 1843
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus thurmanni (24)
Picet & Campiche, 1858
Synonyms: Chimaera (Ischyodon) brevirostris, Ischyodon brevirostris, Ischyodus bouchardi, Ischyodus brevirostris, Ischyodus cf. brevirostris, Ischyodus cf. thurmanni
Original description species: Picet & Campiche, 1858
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus townsendi (11)
(Buckland, 1835)
Synonyms: Chimaera townsendi, Chimaera townsendii, Chimaera (Ischyodon) townsendii, Ischyodon townsendii, Ischyodus cf. townsendi, Ischyodus townsendii, Ischyodus townshendi
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus townsendii (1)
(Buckland, 1835)
Valid name: Ischyodus townsendi
Valid name: Ischyodus townsendi
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus townshendi (1)
(Buckland, 1835)
Valid name: Ischyodus townsendi
Valid name: Ischyodus townsendi
Original description species: (Buckland, 1835)
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus tripartitus (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus williamsae (5)
Case, 1991
Original description species: Case, 1991
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus yanschini (2)
Averianov, 1991
Synonyms: Ischyodus yanshini
Original description species: Averianov, 1991
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus yanshini (1)
Averianov, 1991
Valid name: Ischyodus yanschini
Valid name: Ischyodus yanschini
Original description species: Averianov, 1991
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus zinsmeisteri (1)
Applegate, 1975
Valid name: Ischyodus dolloi
Valid name: Ischyodus dolloi
Original description species: Applegate, 1975
Genus: Ischyodus Egerton, 1843
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus (Chimaera) acutus (1)
Von Meyer, 1859
Valid name: Ischyodus acutus
Valid name: Ischyodus acutus
Original description species: Von Meyer, 1859
Genus: Ischyodus (Chimaera)
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus (Chimaera) rostratus (1)
Von Meyer, 1859
Valid name: Ischyodus rostratus
Valid name: Ischyodus rostratus
Original description species: Von Meyer, 1859
Genus: Ischyodus (Chimaera)
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali
Ischyrhiza aff. avonicola (1)
Estes, 1964
Valid name: Ischyrhiza avonicola
Valid name: Ischyrhiza avonicola
Original description species: Estes, 1964
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza aff. mira (2)
Leidy, 1856
Valid name: Ischyrhiza mira
Valid name: Ischyrhiza mira
Original description species: Leidy, 1856
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza antiqua (2)
Leidy, 1856
Valid name: Ischyrhiza mira
Valid name: Ischyrhiza mira
Original description species: Leidy, 1856
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza avonicola (43)
Estes, 1964
Synonyms: Ischyrhiza aff. avonicola, Ischyrhiza cf. avonicola, Ischyrhiza germaniae, Ischyrhiza monasterica, Sclerorhynchus germaniae, Texatrygon avonicola
Original description species: Estes, 1964
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza basinensis (1)
Case, 1987
Original description species: Case, 1987
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza cf. avonicola (7)
Estes, 1964
Valid name: Ischyrhiza avonicola
Valid name: Ischyrhiza avonicola
Original description species: Estes, 1964
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza cf. mira (1)
Leidy, 1856
Valid name: Ischyrhiza mira
Valid name: Ischyrhiza mira
Original description species: Leidy, 1856
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza cf. texana (1)
Cappetta & Case, 1975
Valid name: Kiestus texana
Valid name: Kiestus texana
Original description species: Cappetta & Case, 1975
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza chilensis (12)
(Philippi, 1887)
Original description species: (Philippi, 1887)
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza georgiensis (2)
Case, Schwimmer, Borodin & Leggett, 2001
Original description species: Case, Schwimmer, Borodin & Leggett, 2001
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza germaniae (2)
(Albers & Weiler, 1964)
Valid name: Ischyrhiza avonicola
Valid name: Ischyrhiza avonicola
Original description species: (Albers & Weiler, 1964)
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza hartenbergeri (8)
Cappetta, 1975
Original description species: Cappetta, 1975
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza iwakiensis (3)
Uyeno & Hasegawa, 1986
Valid name: Onchosaurus pharao
Valid name: Onchosaurus pharao
Original description species: Uyeno & Hasegawa, 1986
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza mira (60)
Leidy, 1856
Synonyms: Ischyrhiza aff. mira, Ischyrhiza antiqua, Ischyrhiza cf. mira, Ischyrhiza mira mira, Onchosaurus (Ischyrhiza) antiquus
Original description species: Leidy, 1856
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza mira mira (5)
Leidy, 1856
Valid name: Ischyrhiza mira
Valid name: Ischyrhiza mira
Original description species: Leidy, 1856
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza mira schneideri (1)
Slaughter & Steiner, 1968
Valid name: Ischyrhiza schneideri
Valid name: Ischyrhiza schneideri
Original description species: Slaughter & Steiner, 1968
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza monasterica (2)
Case & Cappetta, 1997
Valid name: Ischyrhiza avonicola
Valid name: Ischyrhiza avonicola
Original description species: Case & Cappetta, 1997
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza nigeriensis (4)
(Tabaste, 1963)
Synonyms: Ischirhiza nigeriensis, Marckgrafia nigeriensis
Original description species: (Tabaste, 1963)
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza radiata (2)
Clark, 1895
Original description species: Clark, 1895
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza schneideri (10)
(Slaughter & Steiner, 1968)
Synonyms: Ischyrhiza mira schneideri
Original description species: (Slaughter & Steiner, 1968)
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza serra (1)
Nessov, 1997
Original description species: Nessov, 1997
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza sp. (9)

Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza texana (5)
Cappetta & Case, 1975
Valid name: Kiestus texana
Valid name: Kiestus texana
Original description species: Cappetta & Case, 1975
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza viaudi (3)
Cappetta, 1981
Original description species: Cappetta, 1981
Genus: Ischyrhiza Leidy, 1856
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ishaquia globidens (3)
(Arambourg, 1952)
Synonyms: Dasyatis globidens
Original description species: (Arambourg, 1952)
Genus: Ishaquia Noubhani & Cappetta, 1995
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isidobatus triacarinatus (2)

Genus: Isidobatus Werner, 1989
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius aff. brasiliensis-f (1)
(Quoy & Gaimard, 1824)
Valid name: Isistius brasiliensis-f
Valid name: Isistius brasiliensis-f
Original description species: (Quoy & Gaimard, 1824)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius aff. triangulus (4)
(Probst, 1879)
Valid name: Isistius triangulus
Valid name: Isistius triangulus
Original description species: (Probst, 1879)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius aff. trituratus (1)
(Winkler, 1874)
Valid name: Isistius trituratus
Valid name: Isistius trituratus
Original description species: (Winkler, 1874)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius brasiliensis-f (3)
(Quoy & Gaimard, 1824)
Synonyms: Isistius aff. brasiliensis-f
Original description species: (Quoy & Gaimard, 1824)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius cf. triangulus (7)
(Probst, 1879)
Valid name: Isistius triangulus
Valid name: Isistius triangulus
Original description species: (Probst, 1879)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius cf. trituratus (6)
(Winkler, 1874)
Valid name: Isistius trituratus
Valid name: Isistius trituratus
Original description species: (Winkler, 1874)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius sp-f (18)

Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius triangulus (60)
(Probst, 1879)
Synonyms: Centrina dertonensis, Isistius aff. triangulus, Isistius cf. triangulus, Scymnorhinus triangulus, Scymnus triangulus
Original description species: (Probst, 1879)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius trituratus (55)
(Winkler, 1874)
Synonyms: Centrina trituratus, Corax trituratus, Isistius aff. trituratus, Isistius cf. trituratus, Scymnus trituratus
Original description species: (Winkler, 1874)
Genus: Isistius Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon acuarius (27)
(Probst, 1879)
Valid name: Carcharhinus acuarius
Valid name: Carcharhinus acuarius
Original description species: (Probst, 1879)
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon aff. acuarius (1)
(Probst, 1979)
Valid name: Carcharhinus acuarius
Valid name: Carcharhinus acuarius
Original description species: (Probst, 1979)
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon aikenensis (3)
Cicimurri & Knight, 2019
Valid name: Carcharhinus aikenensis
Valid name: Carcharhinus aikenensis
Original description species: Cicimurri & Knight, 2019
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon caunellensis (3)
(Cappetta, 1970)
Valid name: Carcharhinus caunellensis
Valid name: Carcharhinus caunellensis
Original description species: (Cappetta, 1970)
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon cf. caunellensis (1)
(Cappetta, 1970)
Valid name: Carcharhinus caunellensis
Valid name: Carcharhinus caunellensis
Original description species: (Cappetta, 1970)
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon lerichei (2)
(Darteville & Casier, 1943)
Valid name: Carcharhinus lerichei
Valid name: Carcharhinus lerichei
Original description species: (Darteville & Casier, 1943)
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon oxyrhynchus-f (1)
(Müller & Henle, 1839)
Valid name: Carcharhinus oxyrhynchus-f
Valid name: Carcharhinus oxyrhynchus-f
Original description species: (Müller & Henle, 1839)
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon sp-f (5)

Valid name: Carcharhinus sp-f
Valid name: Carcharhinus sp-f
Genus: Isogomphodon Gill, 1862
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isotaenia neocaeariensis (1)
Cope, 1875
Original description species: Cope, 1875
Genus: Isotaenia Cope, 1875
Order: Chimaeriformes
Subclass: Holocephali
Isotaenia neocaesariensis (4)
Cope, 1875
Original description species: Cope, 1875
Genus: Isotaenia Cope, 1875
Order: Chimaeriformes
Subclass: Holocephali
Isurolamna aff. inflata (2)
(Leriche, 1905)
Valid name: Isurolamna inflata
Valid name: Isurolamna inflata
Original description species: (Leriche, 1905)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna affinis (36)
(Casier, 1946)
Synonyms: Lamiostoma affinis, Lamna affinis, Odontaspis (Synodontaspis) affinis
Original description species: (Casier, 1946)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna bajarunasi (9)
(Glikman & Zhelezko, 1985)
Synonyms: Lamiostoma bajarunasi
Original description species: (Glikman & Zhelezko, 1985)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna biflexa (5)
(Rogovich, 1861)
Synonyms: Anomotodon biflexus, Oxyrhina biflena, Oxyrhina biflexa
Original description species: (Rogovich, 1861)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna gracilis (94)
(Le Hon, 1871)
Synonyms: Isurolamna rupeliensis, Isurus gracilis, Lamiostoma gracilis, Lamiostoma rupeliensis, Lamna cf. rupeliensis, Lamna hasloensis, Lamna rupeliensis, Otodus rupeliensis, Oxyrhina gracilis, Rhizoquadrangulus rupeliensis
Original description species: (Le Hon, 1871)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna inflata (40)
(Leriche, 1905)
Synonyms: Isurolamna aff. inflata, Lamna inflata, Lamna lerichei inflata, Lamna vincenti inflata
Original description species: (Leriche, 1905)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna lerichei (2)
(Casier, 1946)
Valid name: Brachycarcharias lerichei
Valid name: Brachycarcharias lerichei
Original description species: (Casier, 1946)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna menneri (2)
(Glikman & Zhelezko, 1985)
Synonyms: Lamiostoma menneri
Original description species: (Glikman & Zhelezko, 1985)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna rupeliensis (5)
(Le Hon, 1871)
Valid name: Isurolamna gracilis
Valid name: Isurolamna gracilis
Original description species: (Le Hon, 1871)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna schoutedeni (3)
(Herman, 1973)
Synonyms: Isurus schoutedeni (Herman 1973), Oxyrhina shoutedeni
Original description species: (Herman, 1973)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna sp. (6)

Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna vandenbroecki (4)
(Winkler, 1880)
Valid name: Lethenia vandenbroecki
Valid name: Lethenia vandenbroecki
Original description species: (Winkler, 1880)
Genus: Isurolamna Cappetta, 1976
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isuropsis glaucus-f (1)
(Linnaeus, 1758)
Valid name: Prionace glauca-f
Valid name: Prionace glauca-f
Original description species: (Linnaeus, 1758)
Genus: Isuropsis Gill, 1862
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isuropsis mako-f (1)
(Whitley, 1929)
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: (Whitley, 1929)
Genus: Isuropsis Gill, 1862
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus acuminatus (1)
(Agassiz, 1835)
Valid name: Acrolamna acuminata
Valid name: Acrolamna acuminata
Original description species: (Agassiz, 1835)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. benedeni (1)
(Le Hon, 1871)
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: (Le Hon, 1871)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. desori flandrica (1)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. flandricus (1)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. oxyrinchus-f (3)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. praecursor (1)
(Leriche, 1905)
Valid name: Macrorhizodus praecursor
Valid name: Macrorhizodus praecursor
Original description species: (Leriche, 1905)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. retroflexus (1)
(Agassiz, 1838)
Valid name: Isurus retroflexus
Valid name: Isurus retroflexus
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus angustidens (3)
(Reuss, 1845)
Valid name: Paranomotodon angustidens
Valid name: Paranomotodon angustidens
Original description species: (Reuss, 1845)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedeni (24)
(Le Hon, 1871)
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: (Le Hon, 1871)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedeni bolderiensis (1)
Geyn Van De, 1937
Valid name: Parotodus benedeni bolderiensis
Valid name: Parotodus benedeni bolderiensis
Original description species: Geyn Van De, 1937
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedeni oligocaena (1)
Geyn Van De, 1937
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: Geyn Van De, 1937
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedeni oligocaenus (1)
Geyn Van De, 1937
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: Geyn Van De, 1937
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedictus (1)
(Le Hon, 1871)
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: (Le Hon, 1871)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus biconvexus (2)
(Ameghino, 1906)
Synonyms: Oxyrhina biconvexus
Original description species: (Ameghino, 1906)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. angustidens (1)
(Reuss, 1845)
Valid name: Paranomotodon angustidens
Valid name: Paranomotodon angustidens
Original description species: (Reuss, 1845)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. benedeni (4)
(Le Hon, 1871)
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: (Le Hon, 1871)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. desori (4)
(Agassiz, 1843)
Valid name: Isurus desori
Valid name: Isurus desori
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. hastalis (2)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. novus (1)
(Winkler, 1874)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (Winkler, 1874)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. oxyrhinchus-f (7)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. oxyrhynchus-f (1)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. oxyrinchus-f (15)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. paucus-f (3)
Guitart Manday, 1966
Valid name: Isurus paucus-f
Valid name: Isurus paucus-f
Original description species: Guitart Manday, 1966
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. praecursor (3)
(Leriche, 1905)
Valid name: Macrorhizodus praecursor
Valid name: Macrorhizodus praecursor
Original description species: (Leriche, 1905)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. spallanzani-f (1)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. verticalis (1)
(Agassiz, 1843)
Valid name: Hypotodus verticalis
Valid name: Hypotodus verticalis
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. vincenti (1)
(Woodward, 1899)
Valid name: Hypotodus verticalis
Valid name: Hypotodus verticalis
Original description species: (Woodward, 1899)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus crassidens (1)
(Dixon, 1850)
Valid name: Cretodus crassidens
Valid name: Cretodus crassidens
Original description species: (Dixon, 1850)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus crassus (1)
(Agassiz, 1843)
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus denticulatus (3)
Glikman, 1957
Valid name: Cretoxyrhina denticulata
Valid name: Cretoxyrhina denticulata
Original description species: Glikman, 1957
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori (243)
(Agassiz, 1843)
Synonyms: Isurus cf. desori, Isurus desorii, Isurus desorii desorii, Isurus (Oxyrhina) desori, Lamiostoma desori, Lamna desori, Lamna inaequilateralis, Lamna lyellii, Oxyrhina aff. desori, Oxyrhina cf. desori, Oxyrhina desori, Oxyrhina desorii
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori aff. flandriens (1)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori flandrica (3)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori flandricus (2)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori praecursor (1)
(Leriche, 1905)
Valid name: Macrorhizodus praecursor
Valid name: Macrorhizodus praecursor
Original description species: (Leriche, 1905)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii (11)
(Agassiz, 1843)
Valid name: Isurus desori
Valid name: Isurus desori
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii aff. flandricus (1)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii desorii (1)
(Agassiz, 1843)
Valid name: Isurus desori
Valid name: Isurus desori
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii flandricus (1)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus eocaenus (2)
(Woodward, 1889)
Valid name: Xiphodolamia eocaena
Valid name: Xiphodolamia eocaena
Original description species: (Woodward, 1889)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus escheri (23)
(Agassiz, 1843)
Valid name: Isurus subserratus
Valid name: Isurus subserratus
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus flandricus (5)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus glaucus-f (3)
(Linnaeus, 1758)
Valid name: Prionace glauca-f
Valid name: Prionace glauca-f
Original description species: (Linnaeus, 1758)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus gracilis (4)

Valid name: Isurolamna gracilis
Valid name: Isurolamna gracilis
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus gracilis flandrica (1)
(Leriche, 1910)
Valid name: Macrorhizodus flandricus
Valid name: Macrorhizodus flandricus
Original description species: (Leriche, 1910)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis (183)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis escheri (6)
(Agassiz, 1843)
Valid name: Isurus subserratus
Valid name: Isurus subserratus
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis hastalis (8)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis pliocaenica (1)
Geyn, 1937
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: Geyn, 1937
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis supraoligocaena (1)
Weiler, 1943
Valid name: Isurus oxyrinchus
Valid name: Isurus oxyrinchus
Original description species: Weiler, 1943
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis trigonodon (7)
(Agassiz, 1843)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus incertus (2)
(Michelotti, 1861)
Synonyms: Oxyrhina incerta
Original description species: (Michelotti, 1861)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus laevigatus (1)
(Daimeries, 1888)
Original description species: (Daimeries, 1888)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus leptodon (1)
(Agassiz, 1843)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus mantelli (12)
(Agassiz, 1835)
Valid name: Cretoxyrhina mantelli
Valid name: Cretoxyrhina mantelli
Original description species: (Agassiz, 1835)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus mantellii (2)
(Agassiz, 1835)
Valid name: Cretoxyrhina mantelli
Valid name: Cretoxyrhina mantelli
Original description species: (Agassiz, 1835)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus microtus (2)
(Rogovich, 1861)
Synonyms: Otodus microtus
Original description species: (Rogovich, 1861)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus minutus (19)
(Agassiz, 1843)
Synonyms: Lamna aff. minuta, Oxyrhina minuta
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus nakaminatoensis (1)
Saito, 1961
Original description species: Saito, 1961
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus nova (4)
(Winkler, 1874)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (Winkler, 1874)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus novus (14)
(Winkler, 1874)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (Winkler, 1874)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrhinchus hastalis (3)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrhinchus-f (15)
Rafinesque, 1810
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrhynchus hastalis (1)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrhynchus-f (14)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrinchus-f (161)
Rafinesque, 1810
Synonyms: Isuropsis mako-f, Isurus aff. oxyrinchus-f, Isurus cf. oxyrhinchus-f, Isurus cf. oxyrhynchus-f, Isurus cf. oxyrinchus-f, Isurus cf. spallanzani-f, Isurus oxyrhynchus-f, Isurus spallanzani-f, Isurus spallanzanii-f, Lamna spallanzanii-f, Oxyrhina gomphodon-f, Oxyrhina oxyrhynchus-f, Oxyrhina spallanzani-f, Oxyrhina spallanzanii-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus pagoda (8)
(Noetling, 1901)
Valid name: Glyphis pagoda
Valid name: Glyphis pagoda
Original description species: (Noetling, 1901)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus paucus-f (18)
Guitart Manday, 1966
Synonyms: Isurus cf. paucus-f
Original description species: Guitart Manday, 1966
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus planus (21)
(Agassiz, 1856)
Valid name: Carcharodon planus
Valid name: Carcharodon planus
Original description species: (Agassiz, 1856)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus praecursor (42)
(Leriche, 1905)
Valid name: Macrorhizodus praecursor
Valid name: Macrorhizodus praecursor
Original description species: (Leriche, 1905)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus praecursor americanus (1)
(Leriche, 1942)
Valid name: Macrorhizodus americanus
Valid name: Macrorhizodus americanus
Original description species: (Leriche, 1942)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus rameshi (2)
Mehrotra, Mishra & Srivastava, 1973
Original description species: Mehrotra, Mishra & Srivastava, 1973
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus rectus (2)
(Davis, 1888)
Synonyms: Oxyrhina recta
Original description species: (Davis, 1888)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus retoflexus (4)
(Agassiz, 1843)
Valid name: Isurus retroflexus
Valid name: Isurus retroflexus
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus retroflexa (3)
(Agassiz, 1838)
Valid name: Isurus retroflexus
Valid name: Isurus retroflexus
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus retroflexus (115)
(Agassiz, 1838)
Synonyms: Anotodus agassizii, Anotodus cf. agassizii, Anotodus retroflexus, Isurus aff. retroflexus, Isurus retoflexus, Isurus retroflexa, Oxyrhina agassizii, Oxyrhina complanata, Oxyrhina retroflexa
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus rhenanus (2)
(Jaekel, 1898)
Synonyms: Oxyrrhina rhenana
Original description species: (Jaekel, 1898)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus salentinus (2)
(Costa, 1850)
Synonyms: Otodus salentinus
Original description species: (Costa, 1850)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sanctae-clarae (1)
Jordan & Hannibal, 1923
Valid name: Isurus sanctaeclarae
Valid name: Isurus sanctaeclarae
Original description species: Jordan & Hannibal, 1923
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus schoutedeni (1)
(Darteville & Casier, 1943)
Valid name: Cretalamna schoutedeni
Valid name: Cretalamna schoutedeni
Original description species: (Darteville & Casier, 1943)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus schoutedeni (Herman 1973) (1)

Valid name: Isurolamna schoutedeni
Valid name: Isurolamna schoutedeni
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sheppeyensis (1)
(Casier, 1966)
Valid name: Anomotodon sheppeyensis
Valid name: Anomotodon sheppeyensis
Original description species: (Casier, 1966)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sillimani (11)
(Gibbes, 1847)
Synonyms: Isurus sillimanii, Oxyrhina aff. sillimani, Oxyrhina cf. sillimani, Oxyrhina sillimani, Oxyrhina sillimanii
Original description species: (Gibbes, 1847)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sillimanii (3)
(Gibbes, 1847)
Valid name: Isurus sillimani
Valid name: Isurus sillimani
Original description species: (Gibbes, 1847)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus smithii (1)
Jordan, 1907
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: Jordan, 1907
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sp-f (80)

Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus spallanzani-f (1)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus spallanzanii-f (4)
Rafinesque, 1810
Valid name: Isurus oxyrinchus-f
Valid name: Isurus oxyrinchus-f
Original description species: Rafinesque, 1810
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus subserratus (80)
(Agassiz, 1843)
Synonyms: Carcharias escheri, Carcharias subserratus, Carcharocles subserratus, Carcharodon escheri, Carcharodon microdon, Carcharodon subserratus, Carcharomodus escheri, Cosmopolitodus escheri, Isurus escheri, Isurus hastalis escheri, Lamna obliqua subserrata, Macrorhizodus escheri, Otodus subserratus, Oxyrhina escheri, Oxyrhina hastalis escheri
Original description species: (Agassiz, 1843)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus triangularis (1)
(Egerton, 1844)
Valid name: Cretalamna triangularis
Valid name: Cretalamna triangularis
Original description species: (Egerton, 1844)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus tumulus (2)
(Agassiz, 1856)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1856)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus winkleri (1)
(Vincent, 1876)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (Vincent, 1876)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus woodsii (1)
(M’coy in Tenison-Woods, 1862)
Original description species: (M’coy in Tenison-Woods, 1862)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus xiphodon (10)
(Agassiz, 1838)
Valid name: Carcharodon plicatilis
Valid name: Carcharodon plicatilis
Original description species: (Agassiz, 1838)
Genus: Isurus Rafinesque, 1810
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Cosmopolitodus) hastalis (1)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus (Cosmopolitodus)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Cretoxyrhina) mantelli (1)
(Agassiz, 1835)
Valid name: Cretoxyrhina mantelli
Valid name: Cretoxyrhina mantelli
Original description species: (Agassiz, 1835)
Genus: Isurus (Cretoxyrhina)
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Macrorhizodus) hastalis (1)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus (Macrorhizodus)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Oxyrhina) aff. novus (1)
(Winkler, 1874)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (Winkler, 1874)
Genus: Isurus (Oxyrhina)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Oxyrhina) angustidens (1)
(Reuss, 1845)
Valid name: Paranomotodon angustidens
Valid name: Paranomotodon angustidens
Original description species: (Reuss, 1845)
Genus: Isurus (Oxyrhina)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Oxyrhina) benedeni (2)
(Le Hon, 1871)
Valid name: Parotodus benedeni
Valid name: Parotodus benedeni
Original description species: (Le Hon, 1871)
Genus: Isurus (Oxyrhina)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Oxyrhina) desori (1)
(Agassiz, 1843)
Valid name: Isurus desori
Valid name: Isurus desori
Original description species: (Agassiz, 1843)
Genus: Isurus (Oxyrhina)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Oxyrhina) hastalis (2)
(Agassiz, 1838)
Valid name: Carcharodon hastalis
Valid name: Carcharodon hastalis
Original description species: (Agassiz, 1838)
Genus: Isurus (Oxyrhina)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Oxyrhina) sp. (1)

Valid name: Isurus sp.
Valid name: Isurus sp.
Genus: Isurus (Oxyrhina)
Family: Lamnidae Bonaparte, 1835
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Itapyrodus punctatus (7)
Silva Santos, 1990
Original description species: Silva Santos, 1990
Genus: Itapyrodus Silva Santos, 1990
Family: Petalodontidae Newberry & Worthen, 1866
Order: Petalodontiformes
Subclass: Euchondrocephali
Itapyrodus sp. (1)

Genus: Itapyrodus Silva Santos, 1990
Family: Petalodontidae Newberry & Worthen, 1866
Order: Petalodontiformes
Subclass: Euchondrocephali
Ivanelepis costulata (2)
Karatajute-Talimaa, 1997
Original description species: Karatajute-Talimaa, 1997
Genus: Ivanelepis Karatajute-Talimaa, 1997
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii
Ixobatis mucronata (6)
(Arambourg, 1952)
Synonyms: Raja mucronata
Original description species: (Arambourg, 1952)
Genus: Ixobatis Noubhani & Cappetta, 1995
Family: incert. fam.
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii