Ctenacanthus
ver. 1.1
| Order |
Ctenacanthiformes ZANGERL, 1981 |
| Family | Ctenacanthidae DEAN, 1909 |
| Genus | Ctenacanthus AGASSIZ, 1835 |
| Ctenacanthus artiensis KOZLOV, 2000: Lower Permian, Arty Formation, Krasnoufimsk, Middle Ural, Russia |
| 8 mm W |
| Ctenacanthus obruchevi: Lower Permian, Arty Formation, Krasnoufimsk, Middle Ural, Russia |
| 5 mm W, 5.1 mm W |
| 20020916 |
| Ctenacanthus amblyxiphias (COPE, 1891)/ Symmorium reniforme ST. JOHN et WORTHEN, 1875: Upper Mississippian, Indian Springs Formation, Crawford County, Indiana |
| 10 mm W |
| 20120618 |
Phoebodus
ver. 1.0
| Order Ctenacanthiformes ZANGERL, 1981 |
| Family Phoebodontidae WILLIAMS, 1979 |
| Genus Phoebodus ST. JOHN et WORTHEN, 1875 |
| Phoebodus sp.: Middle Mississippian, Harrodsburg Limestone Fm., Washington County, Indiana |
| 4.5 mm W, 15 mm H |
| 20120618 |