Ctenacanthus information

Ctenacanthus; Temporal range: 363–323 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Agassiz's plate of C. major.
	Restoration of C. concinnus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Ctenacanthiformes
Family:	†Ctenacanthidae
Genus:	†Ctenacanthus; Agassiz, 1837
Type species
	Ctenacanthus major; Agassiz, 1837
Species
	See text

Ctenacanthus (from Greek: κτείς kteis, 'comb' and Greek: ἄκανθα akantha, 'spine')^[1] is an extinct genus of ctenacanthiform chondrichthyan. Remains have been found in the Bloyd Formation (Carboniferous Period) of Arkansas and the Cleveland Shale (Devonian Period) of Ohio in the United States and in South America.^[2]^[3]^[4]

^ Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 38. Retrieved 29 December 2021.
^ Acanthodian fish remains from the Upper Silurian or Lower Devonian of the Amazon Basin, Brazil. Philippe Janvier, Jose Henrique G. Melo, Palaeontology, Aug 1988, Vol 31, part 3
^ Agassiz, Louis (1837). "De genre Ctenacanthus Agass". Contenant l'Histoire de l'Ordre de Placoïdes. Recherches sur les poissons fossiles. Vol. 3. Neuchâtel: Petitpierre. pp. 10–12.
^ "Ctenacanthus". paleobiodb.org. Retrieved 2023-04-25.

[1] Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 38. Retrieved 29 December 2021.

[2] Acanthodian fish remains from the Upper Silurian or Lower Devonian of the Amazon Basin, Brazil. Philippe Janvier, Jose Henrique G. Melo, Palaeontology, Aug 1988, Vol 31, part 3

[Agassiz,_1837-3] Agassiz, Louis (1837). "De genre Ctenacanthus Agass". Contenant l'Histoire de l'Ordre de Placoïdes. Recherches sur les poissons fossiles. Vol. 3. Neuchâtel: Petitpierre. pp. 10–12.

[4] "Ctenacanthus". paleobiodb.org. Retrieved 2023-04-25.

Ctenacanthus information

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Ctenacanthus

Squatinactis

Ctenacanthiformes

Avonacanthus

Dracopristis

Acanthodii

Xenacanthida

Xenacanthus

Parexus

Acanthodiformes

Symmoriiformes

Maghriboselache

Poracanthodes

Gyracanthidae

Stethacanthus

Nerepisacanthus

Archer City Formation

Acanthodopsis

Akmonistion

Tetanopsyrus

Cladoselache

List of prehistoric cartilaginous fish genera

Plesioselachus

Gyracanthides

Cosmoselachus

Fanjingshania

Qianodus

Orthacanthus

Berea Sandstone

Ctenacanthus Temporal range: 363–323 Ma PreꞒ Ꞓ O S D C P T J K Pg N

Agassiz's plate of C. major.

Restoration of C. concinnus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Ctenacanthiformes
Family:	†Ctenacanthidae
Genus:	†Ctenacanthus Agassiz, 1837
Type species
Ctenacanthus major Agassiz, 1837
Species
See text