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]
| Cycloptychius Temporal range: Possible Artinskian occurrence
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Family: | †Rhadinichthyidae |
| Genus: | †Cycloptychius Young, 1866 |
| Species | |
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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
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References
edit- ^ 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. München: Dr. Friedrich Pfeil. p. 299. ISBN 978-3-89937-272-4.
- ^ "PBDB Taxon". paleobiodb.org. Retrieved 2024-07-18.
- ^ 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.
- ^ 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.
- ^ "PBDB Taxon". paleobiodb.org. Retrieved 2024-07-18.
- ^ Evans, F. J. (Fiona Jocelyn) (2005). Taxonomy, palaeoecology and palaeobiogeography of some palaeozoic fish of Southern Gondwana (Thesis). Stellenbosch : Stellenbosch University.
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