Turseodus

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Turseodus
Temporal range: Carnian–Norian
~237–208.5  Ma
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Family:† Turseoidae
Genus:† Turseodus
Leidy 1857
Type species
†T. acutus
Leidy, 1857
Other Species
Synonyms
  • †GwyneddichthisBock, 1959 [1]
  • †EurecanaBock, 1959 [1]

Turseodus is an extinct genus of ray-finned fish found in Late Triassic freshwater sediments of the United States. [2] [3] Two species have been described, T. acutus from the Lockatong Formation (Carnian stage) of Pennsylvania, and T. dolorensis from the Chinle Formation (Norian stage) of Colorado. [4]

Contents

Classification

Although previously placed in the paraphyletic family Palaeoniscidae, [1] Turseodus was later referred to its own family, Turseoidae, by Wilhelm Bock. [5] The lachrymal bone of Turseodus forms part of the oral margin, an unusual condition known otherwise only from the Early to Middle Triassic Pteronisculus . Based on this synapomorphy and other similarities, a close relationship between Turseodus and Pteronisculus is hypothesized. [6] There are also similarities with Turfania from the Permian of China. [6] However, a close evolutionary relationship between these genera has not yet been tested by cladistic analyses.

See also

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References

  1. 1 2 3 Schaeffer, B. (1967). "Late Triassic fishes from the western United States". Bulletin of the American Museum of Natural History. 135 (6): 285–342. hdl:2246/1125 . Retrieved 18 November 2021.
  2. ↑ Irmis, R.B. (2005). "The vertebrate fauna of the Upper Triassic Chinle Formation in northern Arizona" (PDF). Mesa Southwest Museum Bulletin. 9: 63–88. Retrieved 18 November 2021.
  3. ↑ Skrzycka, Roksana (3 July 2014). "Revision of two relic actinopterygians from the Middle or Upper Jurassic Karabastau Formation, Karatau Range, Kazakhstan". Alcheringa: An Australasian Journal of Palaeontology. 38 (3): 364–390. Bibcode:2014Alch...38..364S. doi:10.1080/03115518.2014.880267. S2CID   129308632.
  4. ↑ Romano, Carlo; Koot, Martha B.; Kogan, Ilja; Brayard, Arnaud; Minikh, Alla V.; Brinkmann, Winand; Bucher, Hugo; Kriwet, Jürgen (2016). "Permian-Triassic Osteichthyes (bony fishes): diversity dynamics and body size evolution". Biological Reviews. 91 (1): 106–147. doi:10.1111/brv.12161. PMID   25431138. S2CID   5332637.
  5. ↑ Bock, Wilhelm (1959). "New Eastern American Triassic Fishes and Triassic Correlations". Geological Center Research Series. 1: 1–184.
  6. 1 2 C. Romano, A. López-Arbarello, D. Ware, J. F. Jenks, and W. Brinkmann. 2019. Marine Early Triassic Actinopterygii from the Candelaria Hills (Esmeralda County, Nevada, USA). Journal of Paleontology 93:971-1000 https://doi.org/10.1017/jpa.2019.18


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