Biology:Rachitrema
| Rachitrema | |
|---|---|
| |
| Rachitrema pellati type neural arch in posterior (4b), right lateral (4) and anterior (4a) views. After Sauvage (1883) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Ichthyosauria |
| Genus: | †Rachitrema Sauvage, 1883 |
| Type species | |
| †Rachitrema pellati Sauvage, 1883
| |
Rachitrema is a poorly known genus of ichthyosaur from the Triassic of France . Its remains were found in France by two independent collectors, towards the end of the nineteenth century. They were only isolated bone fragments.[1]
Classification
The type species is R. pellati, described by Sauvage in 1883. When first described, Sauvage classified it as a dinosaur.[1] Later, Franz Nopcsa referred the genus to Anchisauridae, while Karl Alfred von Zittel referred it to either Zanclodontidae or Megalosauridae.[2][3][4]
The ichthyosaur nature of Rachitrema was recognized by Friedrich von Huene, who synonymized it with Shastasaurus. Sauvage conceded that Rachitrema was non-dinosaurian,[5] and the ichthyosaur classification of the genus became universally accepted by several authors.[6][7][8][9][10] McGowan and Motani (2003) considered Rachitrema dinosaurian without comment.[11] However, recent re-examination of the type material of Rachitrema reaffirms the ichthyosaurian classification of the genus, with most of the original remains referable to Ichthyosauria, and the rest being indeterminate beyond Reptilia.[12]
References
- ↑ 1.0 1.1 H.-E. Sauvage. 1883. Recherches sur les reptiles trouvés dans l'étage rhétien des environs d'Autun [Research on the reptiles found in the Rhaetian stage of the environs of Autun]. Annales des Sciences Géologiques 14(3):1-44
- ↑ Zittel, 1890. Handbuch der Palaeontologie. Volume III. Vertebrata (Pisces, Amphibia, Reptilia, Aves). 900 pp.
- ↑ Zittel, 1895. Grundzüge der Palaeontologie (Palaeozoologie). 971 pp.
- ↑ Nopcsa, 1901. Synopsis und Abstammung der Dinosaurier. Földtani Közlöny. 31, 247-288.
- ↑ Sauvage, 1903. Note sur les reptiles de letage Rhetien des environs d'Autun. Bulletin Societe d'Histoire Naturelle d'Autun (France). 16, 309-318.
- ↑ Merriam, 1908. Triassic Ichthyosauria: With special reference to the American forms. 196 pp.
- ↑ Huene, 1922. Die Ichthyosaurier des Lias und ihre Zusammenhänge. Jahresversammlung der palaeontologischen Gesellschaft. Verlag Bornträger, Berlin. 114 pp.
- ↑ Huene, 1951. Eine neue Ichthyosaurier-Gattung der mitteleren Trias. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 94, 80-92.
- ↑ Romer, 1976. Osteology of the Reptiles. University of Chicago Press. 772 pp.
- ↑ Bardet and Cuny, 1993. Triassic reptile faunas from France. Paleontologia Lombarda. 2, 9-17.
- ↑ McGowan and Motani, 2003. Handbook of Paleoherpetology: Ichthyopterygia, Part 8. 175 pp.
- ↑ "Fischer V & Goolaerts S. 2013. Shastasaurid ichthyosaurs and other lost critters from the French Rhaetian | Valentin Fischer - Academia.edu". https://www.academia.edu/4334787.
External links
Wikidata ☰ Q7279538 entry
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