Leptstyrax
ver. 1.0
| Order Lamniformes Berg, 1958 |
| Family Cretoxyrhinidae Glückman, 1958/ Eoptolamnidae Kriwet et al., 2008 |
| Genus Leptstyrax Williston, 1900 |
| Leptostyrax macrorhiza (Cope 1875): a1,a2; Albian-Cenomanian, Pawpaw Formation, Tarrant County, Texas, b;
Lower Santonian, Tyk-Butak, E. Mangyshlak Peninsula,
W. Kazakstan |
20111012 Fumio Nakagawa