Hexanchus
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| Order Hexanchiformes Buen, 1926 |
| Family Hexanchidae Gray, 1851 |
| Genus Hexanchus Rafinesque, 1810 |
| Hexanchu griseus (Bonnaterre, 1788): Kagurazame, Bluntnose sixgill shark |
| Hexanchus nakamurai Teng, 1962: Sirokagurazame, Bigeye sixgill shark |
| Hexanchus griseus (Bonnaterre, 1788)/ Hexanchus gigas Sismonda, 1857: Pliocene, Huarra Formation, Caldera Site, Atacama Desert, Copiapo, Chile |
| Hexanchus griseus (Bonnaterre, 1788)/ Hexanchus gigas Sismonda, 1857: Pliocene, Yorktown Formation, Beaufort County, North Carolina |
| Hexanchus griseus (Bonnaterre, 1788)/ Hexanchus andersoni Jordan, 1907: Miocene, Round Mountain Formation, Kern County, CA |
Notidanodon
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| Order Hexanchiformes Buen, 1926 |
| Family Hexanchidae Gray, 1851 |
| Genus Notidanodon Cappetta, 1975 |
| Notidanodon lanceolatus (Woodward, 1886): Albian, Stary Oskol, Belgorod Region, Russia |
Notorhynchus/"Notidanus"
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Genus Notorhychus Ayres, 1855
| Notorhynchus cepedianus (Péron, 1807)/ N. primigenius (Agassiz, 1843)/ N. kempi Ward, 1979: Pliocene, Yorktown Formation (unit 1)Beaufort County, North Carolina |
| Notorhynchus cepedianus Langhian, Pungo River Formation, Beaufort County, North Carolina Langhian, Calvert Formation, Calvert Cliffs, Calvert County, MD |
| Notorhynchus cepedianus: Chattian, Weinheim, Alzey, Germany |
| Notorhynchus serratissimus (Agassiz, 1844): Bartonian, Shorym Formation, Kujulus, Mangyshlak, Kazakhstan, Bartonian,
Tusbair Mangyshlak, Kazakhstan |
Weltonia
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Genus Weltonia Ward, 1979
| Weltonia
ancistrodon (Arambourg, 1952): Thanetian, |
Heptranchias
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Genus Heptranchias Rafinesque, 1810
| Heptranchias perlo: Edo-aburazame, Sharpnose sevengill shark |
|
Heptranchias
sp. (?howellii)Ypressian, Khouribga Oued Zem Region, Morocco |
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20120120 Fumio Nakagawa