Cycloptychius Explained

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.^{[1] [2]} 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. bidens Matveeva, 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. loocki Evans, 2005 - Early Permian (Artinskian) of South Africa (Whitehill Formation)^[6]

See also

• Prehistoric fish
• List of prehistoric bony fish

Notes and References

1. Web site: PBDB Taxon . 2024-07-18 . paleobiodb.org.
2. Book: Schultze . Hans-Peter . Hans-Peter Schultze . 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 . 299 . 978-3-89937-272-4.
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 . en . 17 . 3 . 466–486 . 10.1080/02724634.1997.10010996 . 0272-4634.
4. Book: Mickle, Kathryn E. . Unraveling the Systematics of Palaeoniscoid Fishes--Lower Actinopterygians in Need of a Complete Phylogenetic Revision . 2012-05-31 . University of Kansas (dissertation) . 488 . en.
5. Web site: PBDB Taxon . 2024-07-18 . paleobiodb.org.
6. Taxonomy, palaeoecology and palaeobiogeography of some palaeozoic fish of Southern Gondwana . Stellenbosch : Stellenbosch University . 2005 . en-ZA . F. J. (Fiona Jocelyn) . Evans.