Rhynchonkos

Rhynchonkos
Temporal range: Early Permian Cisuralian
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Order: †Microsauria
Family: †Goniorhynchidae
Carroll and Gaskill, 1978
Genus: †Rhynchonkos
Schulze and Foreman, 1981
Type species
†Rhynchonkos stovalli
(Olson, 1970) (originally Goniorhynchus stovalli)
Synonyms
  • Goniorhynchus Olson, 1970

Rhynchonkos is an extinct genus of rhynchonkid microsaur. Originally known as Goniorhynchus, it was renamed in 1981 because the name had already been given to another genus;[1] the family, likewise, was originally named Goniorhynchidae but renamed in 1988.[2] The type and only known species is R. stovalli, found from the Early Permian Fairmont Shale in Cleveland County, Oklahoma.[3][4] Rhynchonkos shares many similarities with Eocaecilia, an early caecilian from the Early Jurassic of Arizona. Similarities between Rhynchonkos and Eocaecilia have been taken as evidence that caecilians are descendants of microsaurs.[5] However, such a relationship is no longer widely accepted.[6][7]

  1. ^ Schultze, H.-P.; Foreman, B. (1981). "A new gymnarthrid microsaur from the Lower Permian of Kansas with a review of the tuditanomorph microsaurs (Amphibia)". Occasional Papers of the Museum of Natural History, the University of Kansas. 91. Lawrence: 1–25.
  2. ^ Zanon, R. T. (1988). "A replacement name for the family Goniorhynchidae Carroll and Gaskill, 1978 (Amphibia: Microsauria)". Journal of Paleontology. 62 (2): 317. doi:10.1017/S0022336000030031. S2CID 87467293.
  3. ^ Carroll, R. L.; Gaskill, P. (1978). "The order Microsauria". Memoirs of the American Philosophical Society. 126.
  4. ^ Szostakiwskyj, M.; Pardo, J. D.; Anderson, J. S. (2015). "Micro-CT study of Rhynchonkos stovalli (Lepospondyli, Recumbirostra), with description of two new genera". PLOS ONE. 10 (6): e0127307. Bibcode:2015PLoSO..1027307S. doi:10.1371/journal.pone.0127307. PMC 4465623. PMID 26061187.
  5. ^ Carroll, R. L. (2001). "The origin and early radiation of terrestrial vertebrates" (PDF). Journal of Paleontology. 75 (6): 1202–1213. doi:10.1666/0022-3360(2001)075<1202:toaero>2.0.co;2. S2CID 59359868.
  6. ^ Jenkins, F. A.; Walsh, D. M.; Carroll, R. L. (2007). "Anatomy of Eocaecilia micropodia, a limbed caecilian of the Early Jurassic" (PDF). Bulletin of the Museum of Comparative Zoology. 158 (6): 285–366. doi:10.3099/0027-4100(2007)158[285:AOEMAL]2.0.CO;2. S2CID 86379456.
  7. ^ Cannatella, D. C.; Vieites, D. R.; Zhang, P.; Wake, M. H.; Wake, D. B. (2009). "Amphibians (Lissamphibia)". In Hedges, S. B.; Kumar, S. (eds.). The Timetree of Life. Oxford University Press. pp. 353–356.