Cosmolepis

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Cosmolepis
Temporal range: Early Jurassic (Sinemurian)
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Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Family: †Cosmolepididae
Gardiner, 1967
Genus: †Cosmolepis
Egerton, 1855
Species:
†C. ornatus
Binomial name
†Cosmolepis ornatus
Egerton, 1858
Synonyms

Cosmolepis is an extinct genus of prehistoric marine ray-finned fish that lived during the Early Jurassic epoch.[2] It contains a single species, C. ornatus from the Blue Lias in what is now England. It is the only member of the family Cosmolepididae.[1][3]

It was formerly placed in the Palaeonisciformes, a group of basal ray-finned fishes that is now considered to be paraphyletic.[4][5] It is distinctive for its well-mineralized scales covered in ganoine. Its cheek and jaws have striated ridges of enamel.[6]

Specimens from the Moltrasio Formation of Osteno, Italy have been placed in this species based on non-reliable morphological features common among many "palaeoniscoid" fish, and thus may not be representatives of this taxon.[7]

See also

References

  1. ^ a b Schultze, Hans-Peter; Mickle, Kathryn E.; Poplin, Cecile; Hilton, Eric J.; Grande, Lance (2021). Handbook of Paleoichthyology, 8A. Actinopterygii I. Palaeoniscimorpha, Stem Neopterygii, Chondrostei. Dr. Friedrich Pfeil, München. p. 299. ISBN 978-3-89937-272-4.
  2. ^ "PBDB Taxon". paleobiodb.org. Retrieved 2024-06-18.
  3. ^ Laan, Richard van der (2018-10-11). "Family-group names of fossil fishes". European Journal of Taxonomy (466). doi:10.5852/ejt.2018.466. ISSN 2118-9773.
  4. ^ Schaeffer, Bobb. "The palaeoniscoid fish Turseodus from the Upper Triassic Newark group. American Museum novitates ; no. 1581". Biodiversity Heritage Library. Retrieved 2024-06-18.
  5. ^ Mickle, Kathryn E. (2012-05-31). Unraveling the Systematics of Palaeoniscoid Fishes--Lower Actinopterygians in Need of a Complete Phylogenetic Revision. University of Kansas (dissertation). p. 488.
  6. ^ Cooper, Samuel L. A.; López-Arbarello, Adriana; Maxwell, Erin E. (2024-04-15). "First occurrence of a †coccolepidid fish (?Chondrostei: †Coccolepididae) from the Upper Lias (Toarcian, Early Jurassic) of southern Germany". Palaeontologia Electronica. 27 (1): 1–25. doi:10.26879/1326. ISSN 1094-8074.
  7. ^ Franceschi, Fabio; Marrama, Giuseppe; Carnevale, Giorgio (2024). "The enigmatic "palaeoniscoid" fishes from the Lower Jurassic (Sinemurian) of the Southern Alps (Osteno, Como, Italy)" (PDF). Paleodays. XXIV (4): 62.
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