Ctenacanthiformes

Ctenacanthiformes; Temporal range: 407.6–15.97 Ma PreꞒ Ꞓ O S D C P T J K Pg N Devonian—Early Miocene
	Artist's reconstruction of an unidentified Ctenacanth chondrichthyan and the arthrodire placoderm Holdenius
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Infraclass:	Euselachii
Order:	†Ctenacanthiformes; Glikman, 1964
Subtaxa
	†; †; †Ctenacanthoidea †Ctenacanthidae; ; †Goodrichthys; †; †Kaibabvenator; †; †; †; †; †;
Synonyms
	Ctenacanthida Cappetta (1988);

Ctenacanthiformes is an extinct order of chondrichthyan fish. They possessed ornamented fin spines and cladodont dentition.^[1] Members of the family Ctenacanthidae may have survived into the Cretaceous based on teeth found in deep water deposits of Valanginian age in France^[2] and Austria.^[3]

References[]

^ Duffin, Christopher J.; Ginter, Michal (2006). "Comments on the selachian genus Cladodus Agassiz, 1843". Journal of Vertebrate Paleontology. 26 (2): 253–266. doi:10.1671/0272-4634(2006)26[253:COTSGC]2.0.CO;2.
^ Guinot, Guillaume; Adnet, Sylvain; Cavin, Lionel; Cappetta, Henri (2013-10-29). "Cretaceous stem chondrichthyans survived the end-Permian mass extinction". Nature Communications. 4 (1): 2669. doi:10.1038/ncomms3669. ISSN 2041-1723. PMID 24169620.
^ Feichtinger, Iris; Engelbrecht, Andrea; Lukeneder, Alexander; Kriwet, Jürgen (2020-07-02). "New chondrichthyans characterised by cladodont-like tooth morphologies from the Early Cretaceous of Austria, with remarks on the microstructural diversity of enameloid". Historical Biology. 32 (6): 823–836. doi:10.1080/08912963.2018.1539971. ISSN 0891-2963. S2CID 92392461.

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[1] Duffin, Christopher J.; Ginter, Michal (2006). "Comments on the selachian genus Cladodus Agassiz, 1843". Journal of Vertebrate Paleontology. 26 (2): 253–266. doi:10.1671/0272-4634(2006)26[253:COTSGC]2.0.CO;2.

[2] Guinot, Guillaume; Adnet, Sylvain; Cavin, Lionel; Cappetta, Henri (2013-10-29). "Cretaceous stem chondrichthyans survived the end-Permian mass extinction". Nature Communications. 4 (1): 2669. doi:10.1038/ncomms3669. ISSN 2041-1723. PMID 24169620.

[3] Feichtinger, Iris; Engelbrecht, Andrea; Lukeneder, Alexander; Kriwet, Jürgen (2020-07-02). "New chondrichthyans characterised by cladodont-like tooth morphologies from the Early Cretaceous of Austria, with remarks on the microstructural diversity of enameloid". Historical Biology. 32 (6): 823–836. doi:10.1080/08912963.2018.1539971. ISSN 0891-2963. S2CID 92392461.

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