Iago angustidens (9)
(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 (1)
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 sp. (15)

Genus: Iago COMPAGNO & SPRINGER, 1971
Family: Triakidae GRAY, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iansan beurleni (7)
(SANTOS, 1968)
Synonyms: Rhinobatos beurleni
Original description species: (SANTOS, 1968)
Genus: Iansan BRITO & SERET, 1996
Family: Rhinobatidae MÜLLER & HENLE, 1838
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Iberolepis aragonensis (1)
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
Igdabatis cf. indicus (1)
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 (7)
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 sigmodon (5)
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 (5)
(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
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 (2)
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. (1)

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 (4)
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 (1)
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 (1)
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 (1)
IVANOV, NESTELL & NESTELL, 2012
Original description species: IVANOV, NESTELL & NESTELL, 2012
Genus: Isacrodus IVANOV, NESTELL & NESTELL, 2012
Family: Jalodontidae GINTER, HAIRAPETIAN & KLUG, 2002
Order: Phoebodontiformes
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: Lonchidiidae HERMAN, 1977
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Isanodus paladeji (8)
CUNY, SUTEETHORN, KAMHA, BUFFETAUT & PHILIPPE, 2006
Original description species: CUNY, SUTEETHORN, KAMHA, BUFFETAUT & PHILIPPE, 2006
Genus: Isanodus CUNY, SUTEETHORN, KAMHA, BUFFETAUT & PHILIPPE, 2006
Family: Lonchidiidae HERMAN, 1977
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Isanodus sp. (1)

Genus: Isanodus CUNY, SUTEETHORN, KAMHA, BUFFETAUT & PHILIPPE, 2006
Family: Lonchidiidae HERMAN, 1977
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
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyodon agassizii (1)
(BUCKLAND, 1835)
Valid name: Edaphodon agassizii
Valid name: Edaphodon agassizii
Original description species: (BUCKLAND, 1835)
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon beaumontii (1)
(EGERTON, 1843)
Original description species: (EGERTON, 1843)
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon brevirostris (1)
(AGASSIZ, 1843)
Original description species: (AGASSIZ, 1843)
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon bucklandii (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon dufrenoyii (1)
EGERTON, 1847
Original description species: EGERTON, 1847
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon dutertrii (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon egertonii (1)
(EGERTON, 1843)
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: (EGERTON, 1843)
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 helvetica (1)
(EGERTON, 1843)
Original description species: (EGERTON, 1843)
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon johnsonii (1)
AGASSIZ, 1843
Original description species: AGASSIZ, 1843
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon tessonii (1)
BUCKLAND, 1843
Valid name: Ischyodus tessoni
Valid name: Ischyodus tessoni
Original description species: BUCKLAND, 1843
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodon townsendii (1)
(BUCKLAND, 1835)
Valid name: Ischyodus townsendii
Valid name: Ischyodus townsendii
Original description species: (BUCKLAND, 1835)
Genus: Ischyodon
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus acutus (2)
MEYER, 1859
Synonyms: Ischyodus cf. acutus
Original description species: 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 agassizii
Valid name: Edaphodon agassizii
Original description species: (BUCKLAND, 1835)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus avitus (2)
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 (6)
EGERTON, 1843
Synonyms: Ischyodus cf. beaumonti
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus beaumontii (2)
(EGERTON, 1843)
Original description species: (EGERTON, 1843)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus bifurcatus (10)
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 bouchardi (1)
SAUVAGE, 1867
Original description species: SAUVAGE, 1867
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus brevirostris (4)
(AGASSIZ, 1843)
Original description species: (AGASSIZ, 1843)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus bucklandi (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. acutus (1)
MEYER, 1859
Valid name: Ischyodus acutus
Valid name: Ischyodus acutus
Original description species: 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. 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)
(EGERTON, 1843)
Valid name: Ischyodus egertoni
Valid name: Ischyodus egertoni
Original description species: (EGERTON, 1843)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. schuebleri (1)
QUENSTEDT, 1858
Valid name: Ischyodus schuebleri
Valid name: Ischyodus schuebleri
Original description species: QUENSTEDT, 1858
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus cf. townsendi (1)
(BUCKLAND, 1835)
Valid name: Ischyodus townsendii
Valid name: Ischyodus townsendii
Original description species: (BUCKLAND, 1835)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus colei (1)
(AGASSIZ, 1843)
Valid name: Ischyodus tessoni
Valid name: Ischyodus tessoni
Original description species: (AGASSIZ, 1843)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus curvidens (9)
EGERTON, 1843
Synonyms: Ganodus dentatus, Ganodus neglectus, Ganodus rugulosus
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 (17)
LERICHE, 1902
Synonyms: Ischyodus cf. dolloi
Original description species: LERICHE, 1902
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dufrenovi (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dufrenoyi (2)
EGERTON, 1847
Original description species: EGERTON, 1847
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dutertrei (3)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus dutetrii (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus duvrenoyi (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus egertoni (12)
(EGERTON, 1843)
Synonyms: Chimaera (Ischyodon) egertoni, Ischyodon egertonii, Ischyodus cf. egertoni
Original description species: (EGERTON, 1843)
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus emarginatus (5)
EGERTON, 1843
Synonyms: Chimaera (Ischyodon) emarginata, Ganodus emarginatus, Ischyodon emarginata
Common name: dubia
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 falcatus (1)
EGERTON, 1843
Valid name: Elasmodectes falcatus
Valid name: Elasmodectes falcatus
Original description species: EGERTON, 1843
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 gaskillii (1)
COPE, 1875
Original description species: COPE, 1875
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus helveticus (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus incisus (2)
NEWTON
Original description species: NEWTON
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 (2)
AGASSIZ, 1843
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 longirostris (1)
COPE, 1875
Original description species: COPE, 1875
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 (3)
CHAPMAN & PRITCHARD, 1907
Original description species: CHAPMAN & PRITCHARD, 1907
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus neglectus (1)
EGERTON, 1843
Original description species: EGERTON, 1843
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
Original description species: EGERTON, 1871
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus planus (2)
NEWTON, 1878
Synonyms: Elasmodus planus
Original description species: NEWTON, 1878
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus psittacinus (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus quenstedti (4)
(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 (2)
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
Original description species: SAUVAGE, 1867
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus rugulosus (1)
EGERTON, 1843
Original description species: EGERTON, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus sauvagei (2)
HAMY, 1866
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 schuebleri
Valid name: Ischyodus schuebleri
Original description species: QUENSTEDT, 1858
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus schuebleri (5)
QUENSTEDT, 1858
Synonyms: Chimaera schübleri, Ischyodus cf. schuebleri, Ischyodus schübleri
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. (16)

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
Original description species: PHILIPPI, 1897
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus suprajurensis (2)
SAUVAGE, 1867
Original description species: SAUVAGE, 1867
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus tessoni (11)
BUCKLAND, 1843
Synonyms: Chimaera (Ganodus) colei, Chimaera (Ischyodon) tessoni, Ganodus oweni, Ischyodon tessonii, Ischyodus colei, Leptacanthus serratus
Original description species: BUCKLAND, 1843
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus thurmanni (9)
PICET & CAMPICHE, 1858
Original description species: PICET & CAMPICHE, 1858
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyodus townsendi (1)
(BUCKLAND, 1835)
Valid name: Ischyodus townsendii
Valid name: Ischyodus townsendii
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 townsendii
Valid name: Ischyodus townsendii
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 (4)
CASE, 1991
Original description species: CASE, 1991
Genus: Ischyodus EGERTON, 1843
Family: Edaphodontidae OWEN, 1846
Order: Chimaeriformes
Subclass: Holocephali
Ischyrhiza aff. avonicola (1)
ESTES, 1964
Valid name: Texatrygon avonicola
Valid name: 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 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 (20)
ESTES, 1964
Valid name: Texatrygon avonicola
Valid name: 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 (6)
ESTES, 1964
Valid name: Texatrygon avonicola
Valid name: 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 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 (9)
(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 (1)
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 (1)
(ALBERS & WEILER, 1964)
Valid name: Texatrygon avonicola
Valid name: Texatrygon 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 (7)
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 (48)
LEIDY, 1856
Synonyms: Ischyrhiza aff. mira, Ischyrhiza antiqua, 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
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 (1)
CASE & CAPPETTA, 1997
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 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 (8)
(SLAUGHTER & SCHNEIDER, 1968)
Original description species: (SLAUGHTER & SCHNEIDER, 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. (7)

Genus: Ischyrhiza LEIDY, 1856
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Ischyrhiza texana (4)
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 (2)
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 (2)
(ARAMBOURG, 1952)
Synonyms: Dasyatis globidens
Original description species: (ARAMBOURG, 1952)
Genus: Ishaquia NOUBHANI & CAPPETTA, 1995
Family: Dasyatidae JORDAN, 1888
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isidobatus triacarinatus (2)

Genus: Isidobatus WERNER, 1989
Family: Rhinobatidae MÜLLER & HENLE, 1838
Order: Rhinopristiformes
Superorder: Batomorphii
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, 1876)
Valid name: Isistius trituratus
Valid name: Isistius trituratus
Original description species: (WINKLER, 1876)
Genus: Isistius GILL, 1865
Family: Dalatiidae GRAY, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius cf. triangulus (6)
(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 (4)
(WINKLER, 1876)
Valid name: Isistius trituratus
Valid name: Isistius trituratus
Original description species: (WINKLER, 1876)
Genus: Isistius GILL, 1865
Family: Dalatiidae GRAY, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius sp. (21)

Genus: Isistius GILL, 1865
Family: Dalatiidae GRAY, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isistius triangulus (38)
(PROBST, 1879)
Synonyms: Centrina dertonensis, Isistius aff. triangulus, Isistius cf. triangulus, Isistius dertonensis, 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 (40)
(WINKLER, 1876)
Synonyms: Corax trituratus, Isistius aff. trituratus, Isistius cf. trituratus, Scymnus trituratus
Original description species: (WINKLER, 1876)
Genus: Isistius GILL, 1865
Family: Dalatiidae GRAY, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isogomphodon acuarius (21)
(PROBST, 1879)
Synonyms: Alopecias acuarias, Aprionodon acuarias, Aprionodon acuarius, Carcharhinus acuarius, Carcharhinus (Aprionodon) gracilis, Carcharhinus (Aprionodon) lerichei minuta, Isogomphodon gracilis
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 caunellensis (5)
(CAPPETTA, 1970)
Synonyms: Aprionodon aff. caunellensis, Aprionodon caunellensis, Aprionodon cf. 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 sp. (2)

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 (3)
COPE, 1875
Original description species: COPE, 1875
Genus: Isotaenia COPE, 1875
Order: Chimaeriformes
Subclass: Holocephali
Isurolamna aff. inflata (1)
(LERICHE, 1905)
Valid name: Isurolamna inflata
Valid name: Isurolamna inflata
Original description species: (LERICHE, 1905)
Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna affinis (27)
(CASIER, 1946)
Synonyms: Isurolamna hopei affinis, Lamiostoma affinis, Lamna affinis, Odontaspis hopei affinis, Odontaspis (Synodontaspis) hopei affinis
Original description species: (CASIER, 1946)
Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna bajarunasi (4)
(GLIKMAN & ZHELEZKO, 1985)
Synonyms: Lamiostoma bajarunasi
Original description species: (GLIKMAN & ZHELEZKO, 1985)
Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna gracilis (13)
(LE HON, 1871)
Original description species: (LE HON, 1871)
Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna inflata (24)
(LERICHE, 1905)
Synonyms: Isurolamna aff. inflata, Lamna inflata, Lamna vincenti inflata
Original description species: (LERICHE, 1905)
Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna rupeliensis (3)
(LE HON, 1871)
Valid name: Rhizoquadrangulus rupeliensis
Valid name: Rhizoquadrangulus rupeliensis
Original description species: (LE HON, 1871)
Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurolamna sp. (4)

Genus: Isurolamna CAPPETTA, 1976
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus acuminatus (1)
(AGASSIZ, 1843)
Valid name: Acrolamna acuminata
Valid name: Acrolamna acuminata
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. benedeni (1)
(LE HON, 1871)
Valid name: Parotodus benedenii
Valid name: Parotodus benedenii
Original description species: (LE HON, 1871)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. desori flandrica (1)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus aff. flandricus (1)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedeni (18)
(LE HON, 1871)
Valid name: Parotodus benedenii
Valid name: Parotodus benedenii
Original description species: (LE HON, 1871)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedeni oligocaenus (1)
GEYN VAN DE, 1937
Valid name: Parotodus benedenii
Valid name: Parotodus benedenii
Original description species: GEYN VAN DE, 1937
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus benedictus (1)
(LE HON, 1871)
Valid name: Parotodus benedenii
Valid name: Parotodus benedenii
Original description species: (LE HON, 1871)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. benedeni (3)
(LE HON, 1871)
Valid name: Parotodus benedenii
Valid name: Parotodus benedenii
Original description species: (LE HON, 1871)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. desori (2)
(AGASSIZ, 1843)
Valid name: Isurus desori
Valid name: Isurus desori
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. hastalis (2)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus cf. praecursor (1)
(LERICHE, 1905)
Valid name: Isurus praecursor
Valid name: Isurus praecursor
Original description species: (LERICHE, 1905)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus denticulatus (1)
GLIKMAN, 1957
Valid name: Cretolamna appendiculata
Valid name: Cretolamna appendiculata
Original description species: GLIKMAN, 1957
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori (171)
(AGASSIZ, 1843)
Synonyms: Isurus cf. desori, Isurus desorii, Isurus desorii desorii, 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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori flandrica (2)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori flandricus (2)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desori praecursor (1)
(LERICHE, 1905)
Valid name: Isurus praecursor
Valid name: Isurus praecursor
Original description species: (LERICHE, 1905)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii (7)
(AGASSIZ, 1843)
Valid name: Isurus desori
Valid name: Isurus desori
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii aff. flandricus (1)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus desorii flandricus (1)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus escheri (17)
(AGASSIZ, 1843)
Valid name: Carcharomodus escheri
Valid name: Carcharomodus escheri
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus flandricus (18)
(LERICHE, 1910)
Synonyms: Cosmopolitodus flandricus, Cosmopolitodus (Isurus) flandricus, Isurus aff. desori flandrica, Isurus aff. flandricus, Isurus desori flandrica, Isurus desori flandricus, Isurus desorii aff. flandricus, Isurus desorii flandricus, Isurus gracilis flandrica, Macrorhizodus flandricus, Oxyrhina desori flandrica
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus gracilis (3)

Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus gracilis flandrica (1)
(LERICHE, 1910)
Valid name: Isurus flandricus
Valid name: Isurus flandricus
Original description species: (LERICHE, 1910)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis (136)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis escheri (5)
(AGASSIZ, 1843)
Valid name: Carcharomodus escheri
Valid name: Carcharomodus escheri
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis hastalis (7)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis pliocaenica (1)
GEYN, 1937
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: GEYN, 1937
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus hastalis trigonodon (7)

Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus leptodon (1)

Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus mantelli (7)
(AGASSIZ, 1843)
Valid name: Cretoxyrhina mantelli
Valid name: Cretoxyrhina mantelli
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus mantellii (2)
(AGASSIZ, 1843)
Valid name: Cretoxyrhina mantelli
Valid name: Cretoxyrhina mantelli
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus minutus (14)
(AGASSIZ, 1843)
Synonyms: Lamna aff. minuta, Oxyrhina minuta
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus nova (2)
(WINKLER, 1876)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (WINKLER, 1876)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus novus (10)
(WINKLER, 1876)
Valid name: Anomotodon novus
Valid name: Anomotodon novus
Original description species: (WINKLER, 1876)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrhinchus hastalis (2)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus oxyrhynchus hastalis (1)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus pagoda (7)
(NOETLING, 1901)
Valid name: Glyphis pagoda
Valid name: Glyphis pagoda
Original description species: (NOETLING, 1901)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus planus (18)
(AGASSIZ, 1856)
Synonyms: Oxyrhina plana
Original description species: (AGASSIZ, 1856)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus praecursor (66)
(LERICHE, 1905)
Synonyms: Cosmopolitodus praecursor, Cosmopolitodus (Isurus) praecursor, Isurus cf. praecursor, Isurus desori praecursor, Macrorhizodus praecursor, Macrorhizodus (Isurus) precursor, Otodus lawleyi, Oxyrhina desori praecursor, Oxyrhina latus, Oxyrhina praecursor
Original description species: (LERICHE, 1905)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus retoflexus (3)
(AGASSIZ, 1843)
Valid name: Isurus retroflexus
Valid name: Isurus retroflexus
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus retroflexa (1)
(AGASSIZ, 1843)
Valid name: Isurus retroflexus
Valid name: Isurus retroflexus
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus retroflexus (64)
(AGASSIZ, 1838)
Synonyms: Anotodus complanatus, Anotodus retroflexus, Isurus retoflexus, Isurus retroflexa, Oxyrhina complanata, Oxyrhina retroflexa
Original description species: (AGASSIZ, 1838)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus schoutedeni (1)
(DARTEVILLE & CASIER, 1943)
Valid name: Cretolamna schoutedeni
Valid name: Cretolamna schoutedeni
Original description species: (DARTEVILLE & CASIER, 1943)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sillimanii (2)
(GIBBES, 1847)
Valid name: Isurus sillimani
Valid name: Isurus sillimani
Original description species: (GIBBES, 1847)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus smithii (1)
JORDAN, 1907
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: JORDAN, 1907
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus sp. (65)

Synonyms: Isuropsis sp., Macrorhizodus sp.
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus triangularis (1)
(EGERTON, 1844)
Valid name: Cretolamna triangularis
Valid name: Cretolamna triangularis
Original description species: (EGERTON, 1844)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus tumulus (2)
(AGASSIZ, 1856)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1856)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
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 MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus xiphodon (10)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus RAFINESQUE, 1810
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Cosmopolitodus) hastalis (1)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus (Cosmopolitodus)
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Cretoxyrhina) mantelli (1)
(AGASSIZ, 1843)
Valid name: Cretoxyrhina mantelli
Valid name: Cretoxyrhina mantelli
Original description species: (AGASSIZ, 1843)
Genus: Isurus (Cretoxyrhina)
Family: Cretoxyrhinidae GLICKMAN, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Isurus (Macrorhizodus) hastalis (1)
(AGASSIZ, 1843)
Valid name: Cosmopolitodus hastalis
Valid name: Cosmopolitodus hastalis
Original description species: (AGASSIZ, 1843)
Genus: Isurus (Macrorhizodus)
Family: Lamnidae MÜLLER & HENLE, 1838
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Itapyrodus punctatus (5)
SILVA SANTOS, 1990
Original description species: SILVA SANTOS, 1990
Genus: Itapyrodus SILVA SANTOS, 1990
Family: Petalodontidae NEWBERRY & WORTHEN, 1866
Order: Petalodontiformes
Subclass: Euchondrocephali
Ivanelepis costulata (1)
KARATAJUTE-TALIMAA, 1997
Original description species: KARATAJUTE-TALIMAA, 1997
Genus: Ivanelepis KARATAJUTE-TALIMAA, 1997
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii
Ixobatis mucronata (4)
(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