Original description species: Lund, 1988
Genus: Echinochimaera Lund, 1977
Family: Echinochimaeridae Lund, 1977
Suborder: Echinochimaeroidei
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Lund, 1988
Genus: Echinochimaera Lund, 1977
Family: Echinochimaeridae Lund, 1977
Suborder: Echinochimaeroidei
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Lund, 1988
Genus: Echinochimaera Lund, 1977
Family: Echinochimaeridae Lund, 1977
Suborder: Echinochimaeroidei
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Lund, 1977
Genus: Echinochimaera Lund, 1977
Family: Echinochimaeridae Lund, 1977
Suborder: Echinochimaeroidei
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Lund, 1988
Genus: Echinochimaera Lund, 1977
Family: Echinochimaeridae Lund, 1977
Suborder: Echinochimaeroidei
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Lund, 1988
Genus: Echinochimaera Lund, 1977
Family: Echinochimaeridae Lund, 1977
Suborder: Echinochimaeroidei
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Corax australis, Pseudocorax australis
Original description species: (Chapman, 1909)
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Agassiz, 1856
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Bonnaterre, 1788)
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus cf. caspius
Original description species: Glikman, 1964
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus cf. cookei-f
Original description species: Pietschmann, 1928
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Pledge, 1992
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Pfeil, 1983
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Antunes & Cappetta, 2002
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Bogan, Agnolin, Otero, Egli, Suárez, Soto-Acuña & Novas, 2017
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Pfeil, 1983
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus aff. pollerspoecki
Original description species: Pfeil, 1983
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus possii
Original description species: Ameghino, 1906
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus cf. priscus
Original description species: Arambourg, 1952
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Lawley, 1876
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus cf. riepli
Original description species: Pfeil, 1983
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Guinot, Cappetta & Adnet, 2014
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Kitamura, 2013
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Echinorhinus aff. weltoni
Original description species: Pfeil, 1983
Genus: Echinorhinus Blainville, 1816
Family: Echinorhinidae Gill, 1862
Order: Echinorhiniformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chimaera agassizi, Chimaera agassizii, Chimaera (Ischyodon) agassizi, Chimaera (Ischyodon) agassizii, Edaphodon agassizii, Ischyodon agassizii, Ischyodus agassizi
Original description species: (Buckland, 1835)
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Leriche, 1926
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Darteville & Casier, 1959
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Applegate, 1970
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera (Edaphodon) bucklandi, Edaphodon bucklandii, Edaphodon cf. bucklandi, Edaphodon eurygnathus, Ganodus bucklandi
Original description species: Agassiz, 1843
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Newton, 1878
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Popov & Yarkov, 2001
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Shin, 2010
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Consoli, 2006
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Riess, 1887
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Newton, 1878
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Eumylodus laqueatus
Original description species: (Leidy, 1873)
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Agassiz, 1843
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera mantelli, Chimaera mantellii, Chimaera (Psittacodon) mantellii, Edaphodon mantellii, Psittacodon mantellii
Original description species: (Buckland, 1835)
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Edaphodon cf. mirabilis
Original description species: Chapman & Cudmore, 1924
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Ischyodus mirificus
Original description species: Leidy, 1856
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Carraroli, 1897
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Edaphodon cf. reedi, Edaphodon reedi
Original description species: Newton, 1878
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Canevet & Lebrun, 2017
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera (Psittacodon) sedgwickii, Edaphodon cf. sedgwicki, Edaphodon sedgwickii, Psittacodon sedgwickii
Original description species: (Agassiz, 1838)
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Gouiric-Cavalli, Cabrera, Cione, O'gorman, Coria & Fernández, 2015
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Edaphodon cf. sweeti
Original description species: Chapman & Pritchard, 1907
Genus: Edaphodon Buckland, 1838
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Hay, 1909
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Newberry, 1888
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Synonyms: Edestus cf. heinrichi, Edestus heinrichii, Edestus heinrichsi
Original description species: Newberry & Worthen, 1870
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Missuna, 1908
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Missuna, 1908
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Synonyms: Edestodus kolomnensis
Original description species: Lebedev, 2001
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Synonyms: Edestus cf. minor
Original description species: Newberry & Worthen, 1866
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Hay, 1909
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Hay, 1912
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Synonyms: Edestus cf. newtoni, Lestrodus newtoni
Original description species: Woodward, 1917
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Trautschold, 1879
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Hay, 1909
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Newton, 1904
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Leidy, 1855
Genus: Edestus Leidy, 1855
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Synonyms: Hybodus basanus, Hybodus sulcatus
Original description species: (Egerton, 1844)
Genus: Egertonodus Maisey, 1987
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Rees & Underwood, 2008
Genus: Egertonodus Maisey, 1987
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chimaera (Ganodus) avita, Ischyodus avita, Ischyodus avitus
Original description species: (Von Meyer, 1862)
Genus: Elasmodectes Woodward, 1888
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera falcata, Chimaera (Psittacodon) falcata, Ganodus falcatus, Ganodus psittacinus, Ischyodus falcatus, Leptacanthus semistriatus, Psittacodon falcatum, Psittacodon falcatus
Original description species: (Egerton, 1843)
Genus: Elasmodectes Woodward, 1888
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Elasmodectes cf. kiprijanoffi
Original description species: Nessov in Nessov et al., 1988
Genus: Elasmodectes Woodward, 1888
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Elasmognathus willettii
Original description species: (Newton, 1878)
Genus: Elasmodectes Woodward, 1888
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera zangerli
Original description species: Stahl & Chatterjee, 1999
Genus: Elasmodectes Woodward, 1888
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Elasmodus avirostris
Original description species: Averianov, 1999
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Synonyms: Chimaera greenoughii, Elasmodus greenovi
Original description species: (Agassiz, 1838)
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Synonyms: Elasmodus hunterii
Original description species: Egerton, 1843
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Original description species: Ward, 1977
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Synonyms: Elasmodus khosatskyi
Original description species: Averianov, 1999
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Original description species: Averianov, 1999
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Original description species: Averianov & Glikman, 1994
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Original description species: Averianov, 2001
Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Genus: Elasmodus Egerton, 1843
Subclass: Holocephali

Original description species: Vieth, 1980
Genus: Ellesmereia Vieth, 1980
Family: Elegestolepididae Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Order: Elegestolepidida

Original description species: Trinajstic & George, 2009
Genus: Emerikodus Trinajstic & George, 2009
Family: incert. fam.
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: Turner, 2004
Genus: Emsolepis Turner, 2004
Family: incert. fam.
Order: incert. sedis

Original description species: Cappetta & Case, 1999
Genus: Enantiobatis Cappetta & Case, 1999
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Arratia, Kriwet & Heinrich, 2002
Genus: Engaibatis Arratia, Kriwet & Heinrich, 2002
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Vullo & Cappetta & Néraudeau, 2007
Genus: Engolismaia Vullo, Cappetta & Néraudeau, 2007
Family: incert. fam.
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Tomodus convexus
Original description species: (Davis, 1883 ex Agassiz MSS.)
Genus: Enniskillen
Subclass: Holocephali

Original description species: Engelbrecht, Mörs, Reguero & Kriwet, 2017
Genus: Eodalatias Engelbrecht, Mörs, Reguero & Kriwet, 2017
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Feichtinger, Pollerspöck, Harzhauser, Auer, Ćorić, Kranner & Guinot, 2022
Genus: Eoetmopterus Müller & Schöllmann, 1989
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Eoetmopterus cf. supracretaceus, Eoetmopterus supracretaceous
Original description species: Müller & Schöllmann, 1989
Genus: Eoetmopterus Müller & Schöllmann, 1989
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Alopiopsis plejodon
Original description species: Cappetta, 1975
Genus: Eogaleus Cappetta, 1975
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Ward & Duffin, 1989
Genus: Eomanodon Ward & Duffin, 1989
Family: incert. fam.
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Mobula irenae
Original description species: Pfeil, 1981
Genus: Eomanta Pfeil, 1981
Family: Mobulidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Metlaouia delpiti
Original description species: (Noubhani & Cappetta, 1997)
Genus: Eometlaouia Noubhani & Cappetta, 2002
Family: Orectolobidae Gill, 1896
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Metlaouia numidica, Squatirhina numidica
Original description species: (Arambourg, 1952)
Genus: Eometlaouia Noubhani & Cappetta, 2002
Family: Orectolobidae Gill, 1896
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Eomobula aff. stehmanni
Original description species: Herman, Hovestadt-Euler & Hovestadt, 1989
Genus: Eomobula Herman, Hovestadt-Euler & Hovestadt, 1989
Family: Mobulidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Narcopterus bolcanus, Platyrhina bolcensis
Original description species: (Heckel, 1851)
Genus: Eoplatyrhina Marrama, Carnevale, Claeson, Naylor & Kriwet, 2020
Family: Platyrhinidae Jordan, 1923
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Adnet, Cappetta, Guinot & Notarbartolo Di Sciara, 2012
Genus: Eoplinthicus Cappetta & Stringer, 2002
Family: Mobulidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta & Stringer, 2002
Genus: Eoplinthicus Cappetta & Stringer, 2002
Family: Mobulidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Kriwet, Klug, Canudo & Cuenca-Bescos, 2008
Genus: Eoptolamna Kriwet, Klug, Canudo. & Cuenca-Bescos, 2008
Family: Eoptolamnidae Kriwet, Klug, Canudo & Cuenca-Bescos, 2008
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Guinot, Underwood, Cappetta & Ward, 2013
Genus: Eoptolamna Kriwet, Klug, Canudo. & Cuenca-Bescos, 2008
Family: Eoptolamnidae Kriwet, Klug, Canudo & Cuenca-Bescos, 2008
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Eorhincodon Li, 1997
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Li, 1997
Genus: Eorhincodon Li, 1997
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatos primaevus, Rhinobatus primaevus
Original description species: (De Zigno, 1874)
Genus: Eorhinobatos Marramà, Carnevale, Naylor, Varese, Giusberti & Kriwet, 2020
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case, Cook & Wilson, 2011
Genus: Eorhinoptera Case, Cook & Wilson, 2011
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Herman & Van Den Eeckhaut, 2010
Genus: Eoscymnus Herman & Van Den Eeckhaut, 2010
Family: Eoscymnidae Herman & Van Den Eeckhaut, 2010
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Eosqualiolus aff. aturensis
Original description species: Adnet, 2006
Genus: Eosqualiolus Adnet, 2006
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Underwood & Schlögl, 2013
Genus: Eosqualiolus Adnet, 2006
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Eostegostoma aff. angustum, Eostegostoma angusta
Original description species: Nolf & Taverne in Herman, 1977
Genus: Eostegostoma Herman, 1977
Family: Brachaeluridae Applegate, 1974
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Zhelezko, 1987
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Duffin & Batchelor, 2024
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Glikman & Zhelezko, 1979
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Underwood & Cumbaa, 2010
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Glikman & Zhelezko, 1979
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Carcharias striatula, Odontaspis striatula, Odontaspis (Synodontaspis) striatula, Palaeohypotodus striatula, Scapanorhynchus striatula
Original description species: (Dalinkevicius, 1935)
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Carcharias subulata, Carcharias subulatus, Cretolamna subulata, Lamna subulata, Lamna (Odontaspis) cf. subulata, Lamna (Odontaspis) subulata, Odontaspis subulata, Odontaspis subulatus, Scapanorhynchus cf. subulatus, Scapanorhynchus subulata, Scapanorhynchus (Odontaspis) subulatus
Original description species: (Agassiz, 1843)
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Lamna cf. venusta, Lamna venusta, Plicatolamna venusta
Original description species: (Leriche, 1906)
Genus: Eostriatolamia Glikman, 1979
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Eotorpedo aff. hilgendorfi, Torpedo hilgendorfi
Original description species: (Jaekel, 1904)
Genus: Eotorpedo White, 1934
Family: Torpedinidae Bonaparte, 1838
Order: Torpediniformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: White, 1934
Genus: Eotorpedo White, 1934
Family: Torpedinidae Bonaparte, 1838
Order: Torpediniformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Herman, 1974
Genus: Eotorpedo White, 1934
Family: Torpedinidae Bonaparte, 1838
Order: Torpediniformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1988
Genus: Eotorpedo White, 1934
Family: Torpedinidae Bonaparte, 1838
Order: Torpediniformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Glikman, 1980
Genus: Eoxyphodolamia Glikman, 1980
Family: incert. fam.
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhynchobatus arganiae
Original description species: (Arambourg, 1952)
Genus: Erguitaia Cappetta, 1989
Family: incert. fam.
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1991
Genus: Erguitaia Cappetta, 1989
Family: incert. fam.
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Agassizodus gronlandicus
Original description species: (Nielsen, 1932)
Genus: Erikodus Nielsen, 1952
Family: Caseodontidae Zangerl, 1981
Superfamily: Caseodontoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Synonyms: Cladacanthus paradoxus, Erismacanthus jonesii
Original description species: M'Coy, 1848
Genus: Erismacanthus Mccoy, 1848
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Cladacanthus major
Original description species: Davis, 1883
Genus: Erismacanthus Mccoy, 1848
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Ginter, Hairapetian & Grigoryan, 2011
Genus: Ertychius Ginter, Hairapetian & Grigoryan, 2011
Family: incert. fam.
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: Cappetta, 1991
Genus: Erythrobatis Cappetta, 1991
Family: incert. fam.
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Reinecke, Mollen, Gijsen, D’Haeze & Hoedemakers, 2024
Genus: Essexraja Reinecke, Mollen, Gijsen, D’Haeze & Hoedemakers, 2024
Family: incert. fam.
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Casier, 1966
Genus: Etmopterus Rafinesque, 1810
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Etmopterus cf. cahuzaci
Original description species: Adnet, 2006
Genus: Etmopterus Rafinesque, 1810
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Miroscyllium sp-f
Genus: Etmopterus Rafinesque, 1810
Family: Etmopteridae Fowler, 1934
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Barkas, 1869
Genus: Euctenius Barkas, 1874
Family: Edestidae Jaekel, 1899
Superfamily: Edestoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Wellburn, 1901
Genus: Euctenodopsis Wellburn, 1901
Family: incert. fam.
Order: incert. sedis

Genus: Eugaleus Gill, 1864
Family: Triakidae Gray, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Zangerl, 1981
Genus: Eugenodus Zangerl, 1981
Family: Eugeneodontidae Zangerl, 1981
Superfamily: Caseodontoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Genus: Euglossodus White & Moy-Thomas, 1940
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Synonyms: Glossodus lingua-bovis, Glossodus marginatus
Original description species: (M'Coy, 1848)
Genus: Euglossodus White & Moy-Thomas, 1940
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Original description species: (Newberry & Worthen, 1866)
Genus: Eunemacanthus St. John & Worthen, 1875
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: Lebedev, 1996
Genus: Eunemacanthus St. John & Worthen, 1875
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Genus: Euprotomicroides Hulley & Penrith, 1966
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Euprotomicrus Gill, 1865
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Reinecke, Mollen, Gijsen, D’Haeze & Hoedemakers, 2024
Genus: Eurasiabatis Reinecke, Mollen, Gijsen, D’Haeze & Hoedemakers, 2024
Family: incert. fam.
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii