Acondylacanthus

Phylum:Chordata

Class:Chondrichthyes

Subclass:Elasmobranchii

Order:†Ctenacanthiformes

Acondylacanthus Temporal range: Frasnian– Pennsylvanian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Ctenacanthiformes
Family:	†Ctenacanthidae
Genus:	†Acondylacanthus St. John & Worthen, 1875
Species
A. gracilis A. nuperus A. jaekeli A. colei A. attenuatus A. tenuistriatus A. tuberculatus A. mudgianus A. distans A. aeuicostatus A. gracillimus A. browni

Acondylacanthus is an extinct genus of ctenacanthiform from the Paleozoic era. The type species is A. gracilis.^[1] Most species are known from the Carboniferous of America and the British isles. A. jaekeli is known from the upper Frasnian of Germany and the Upper Famennian of Russia. This genus is based entirely upon isolated dorsal fin spines, and thus may later be found synonymous with tooth-based genera.^[2] Many species have been ascribed to this genus, though there has been some confusion with Ctenachanthus. This genus is in need of review and research.^[3]