Stethacanthidae

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Stethacanthidae Temporal range: Upper Devonian to Carboniferous (Middle Pennsylvanian), 382.7–323.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Stethacanthus altonensis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Order:	†Symmoriiformes
Family:	†Stethacanthidae
Genera
Akmonistion Damocles Stethacanthus

Stethacanthidae is an extinct family of prehistoric holocephalians.^[1] It is estimated to have existed approximately between 380 and 300 million years ago. Members of this family are noted for their peculiar dorsal fin.