Cycloptychius

Cycloptychius Temporal range: Tournaisian–Moscovian [1] PreꞒ Ꞓ O S D C P T J K Pg N Possible Artinskian occurrence
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Family:	† Rhadinichthyidae
Genus:	† Cycloptychius Young, 1866
Species
†C. bidensMatveeva, 1958 †C. carbonariusYoung, 1866 †C. concentricus Traquair, 1881  ?†C. loockiEvans, 2005

Cycloptychius is an extinct genus of prehistoric freshwater & marine ray-finned fish that existed throughout much of the Carboniferous period in Eurasia, and possibly into the Early Permian in South Africa. ^{[2] [1]} It was a member of the Rhadinichthyidae, a family of basal ray-finned fish that was formerly placed in the now-paraphyletic order Palaeonisciformes. ^{[3] [4]}

It contains the following species: ^[5]

• †C. bidensMatveeva, 1958 - Early Carboniferous (Tournaisian) of Krasnoyarsk Krai, Russia (Os’kin Formation)
• †C. carbonarius Young, 1866 - Late Carboniferous (Moscovian) of England (North Staffordshire Coalfield)
• †C. concentricus Traquair, 1881 - Early Carboniferous (Viséan) of Scotland (Glencartholm Volcanic Beds)
•  ?†C. loockiEvans, 2005 - Early Permian (Artinskian) of South Africa (Whitehill Formation) ^[6]

See also

• Paleontology portal
• Fish portal

• Prehistoric fish
• List of prehistoric bony fish

References

1. Schultze, Hans-Peter; Mickle, Kathryn E.; Poplin, Cecile; Hilton, Eric J.; Grande, Lance (2021). Handbook of Paleoichthyology, 8A. Actinopterygii I. Palaeoniscimorpha, Stem Neopterygii, Chondrostei. München: Dr. Friedrich Pfeil. p. 299. ISBN   978-3-89937-272-4.
2. "PBDB Taxon". paleobiodb.org. Retrieved 2024-07-18.
3. Lund, Richard; Poplin, Cécile (1997-09-04). "The rhadinichthyids (paleoniscoid actinopterygians) from the Bear Gulch Limestone of Montana (USA, Lower Carboniferous)" . Journal of Vertebrate Paleontology. 17 (3): 466–486. doi:10.1080/02724634.1997.10010996. ISSN   0272-4634.
4. 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.
5. "PBDB Taxon". paleobiodb.org. Retrieved 2024-07-18.
6. Evans, F. J. (Fiona Jocelyn) (2005). Taxonomy, palaeoecology and palaeobiogeography of some palaeozoic fish of Southern Gondwana (Thesis). Stellenbosch : Stellenbosch University.