| Order Lamniformes BERG, 1958 |
| Family Lamnidae MÜLLER et HENLE, 1838 |
| Genus Isurus RAFINESQUE, 1810 |
| Isurus retroflexus (AGASSIZ, 1843): Pliocene, Kattendijk Formation, Doel village, Belgium |
| Isurus praecursor (LERICHE, 1905)/ Cosmopolitodus americanus : Middle Eocene (Bartonian), Kert, N. Mangyshlak Peninsula, W. Kazakhstan |
| Isurus praecursor (LERICHE, 1905): Middle-Late Eocene (Lutetian-Priabonian), Castle Hayne Limestone, North Carolina |
| Isurus praecursor (LERICHE, 1905): Middle Eocene, Santee Limestone, Martin Marrietta Santee Quarry, Harleyville, Orangeburg County, South Carolina |
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