Classification of the family Hexanchidae

Fm. Hexanchidae Gray 1851 [cow shark]
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G. †Gladioserratus Underwood et al. 2011
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Gladioserratus aptiensis Pictet 1865
Gladioserratus dentatus Guinot et al. 2014
Gladioserratus magnus Underwood et al. 2011
G. Heptranchias Rafinesque 1810 [sevengill shark]
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Heptranchias andersoni Jordan 1907
Heptranchias cinereus Gmelin 1789
Heptranchias ezoensis Applegate and Uyeno 1968
Heptranchias howellii Reed 1946
Heptranchias perlo Bonnaterre 1788
G. Hexanchus Rafinesque 1810 [sixgill shark]
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Hexanchus agassizi Cappetta 1976
Hexanchus gigas Sismonda 1857
Hexanchus gracilis Davis 1887
Hexanchus microdon Agassiz 1835
Hexanchus wiedenrothi Thies 1983
G. †Monopterhinus Blainville 1816
G. †Notidanion Jordan 1923
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Notidanion boreale Jordan and Hanibal 1923
Notidanion chiconis Jordan 1907
G. †Notidanodon Cappetta 1975
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Notidanodon dentatus Woodward 1886
Notidanodon lanceolatus Woodward 1886
Notidanodon pectinatus Agassiz 1843
G. Notidanus Cuvier 1817
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Notidanus gracilis Davis 1887
Notidanus jenningsi Chapman and Pritchard 1904
Notidanus loozi Vincent 1876
Notidanus marginalis Davis 1888
Notidanus munsteri Agassiz 1843
Notidanus recurvus Agassiz 1843
Notidanus serratus Fraas 1855
Notidanus tenuidens Leriche 1938
Notidanus ultra Ameghino 1901
G. Notorhynchus Ayres 1855 [sevengill shark]
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Notorhynchus primigenius Agassiz 1835
G. Notorynchus Ayers 1855
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Invalid names: Notidanus plectrodon Cope 1867 [synonym]
Notorynchus thevenardi Delfortrie 1878
G. †Protoheptranchias Cappetta et al. 2019
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Protoheptranchias lowei Cappetta et al. 2019
G. †Xampylodon Cappetta et al. 2019
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Xampylodon dentatus Woodward 1886