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Eotrigonodon

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Eotrigonodon
Temporal range: mid-Cretaceous to mid-Eocene
Tooth of A. serratus (right) with a shark tooth
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Pycnodontiformes
Genus: Eotrigonodon
Weiler, 1929

Eotrigonodon ("dawn Trigonodon") is a dubious form genus of ray-finned fish known from the Cretaceous to the Eocene.[1] It is known only from isolated teeth. Formerly considered an early genus of tetraodontiform fish in the family "Eotrigonodontidae"[2], more recent studies indicate that they likely represent the pharyngeal teeth of pycnodonts, which are an unrelated, entirely extinct group of fish.[3][4] In addition, it may itself be a junior synonym for Stephanodus, another taxon based on pycnodont teeth.[3] Yet other authors retain the genus as taxonomically unresolved.[5]

The following species are known:[2]

Indeterminate remains are known from the Cenomanian of Brazil, the Late Paleocene of Mali, and the Lutetian of Ukraine.[2]

See also

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References

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  1. ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2009-02-27.
  2. ^ a b c "PBDB Taxon". paleobiodb.org. Retrieved 2025-02-14.
  3. ^ a b Kriwet, Jürgen (2005). "A comprehensive study of the skull and dentition of pycnodont fishes". Zitteliana. A (45): 135–188.
  4. ^ Prasad, Guntupalli V.R. (2012-12-01). "Vertebrate biodiversity of the Deccan volcanic province of India: A review". Bulletin de la Société Géologique de France. 183 (6): 597–610. doi:10.2113/gssgfbull.183.6.597. ISSN 0037-9409.
  5. ^ Murray, A. M.; Thewissen, J. G. M. (2008-03-12). "Eocene actinopterygian fishes from Pakistan, with the description of a new genus and species of channid (channiformes)". Journal of Vertebrate Paleontology. 28 (1): 41–52. doi:10.1671/0272-4634(2008)28[41:EAFFPW]2.0.CO;2. ISSN 0272-4634.