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Ctenacanthus
ver. 1.1
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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

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Fumio Nakagawa

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