Seymouriamorpha
| Seymouriamorpha Temporal range: Early Permian - Late Permian |
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| Skeleton of Seymouria in the National Museum of Natural History | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Subclass: | "Labyrinthodontia" |
| (unranked): | Reptiliomorpha |
| Suborder: | †Seymouriamorpha Watson, 1917 |
| Families | |
Seymouriamorpha were a small but widespread group of reptiliomorphs. Many seymouriamorphs were terrestrial or semi-aquatic. However, aquatic larvae bearing external gills and grooves from the lateral line system has been found, making them unquestionably amphibians. The adults were terrestrial. They ranged from lizard-sized creatures (30 centimeters) to crocodile-sized 150 centimeter long animals. They were reptile-like. Because seymouriamorphs are reptiliomorphs, they were the distant relatives of amniotes, or the relatives of the amniotes's ancestor. Seymouriamorphs form into three main groups, Kotlassiidae, Discosauriscidae, and Seymouriidae, a group that includes the best known genus, Seymouria. The last seymouriamorph became extinct by the end of Permian.
Contents |
[edit] Taxonomy
- Reptiliomorpha
- Order Seymouriamorpha
- Utegenia
- Family Waggoneriidae
- Family Kotlassiidae
- Family Karpinskiosauridae
- Family Discosauriscidae
- Family Seymouriidae
Cladogram based on Ruta, Jeffery, & Coates (2003):[2]
| Seymouriamorpha |
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Cladogram based on Klembara (2009) & Klembara (2010):[3][4]
| Seymouriamorpha |
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[edit] Gallery
[edit] References
- ^ Olson, E. C. (1951). "Fauna of upper Vale and Choza: 1-5 Fieldiana:". Geology 10 (11): 89–128.
- ^ Ruta, M.; Jeffery, J. E.; and Coates, M. I. (2003). "A supertree of early tetrapods". Proceedings of the Royal Society B 270 (1532): 2507–16. doi:10.1098/rspb.2003.2524. PMC 1691537. PMID 14667343. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1691537.
- ^ Klembara, Jozef (2009). "The skeletal anatomy and relationships of a new discosauriscid seymouriamorph from the lower Permian of Moravia (Czech Republic)". Annals of Carnegie Museum 77 (4): 451–483. doi:10.2992/0097-4463-77.4.451.
- ^ Klembara, Jozef (2011). "The cranial anatomy, ontogeny, and relationships of Karpinskiosaurus secundus (Amalitzky) (Seymouriamorpha, Karpinskiosauridae) from the Upper Permian of European Russia". Zoological Journal of the Linnean Society 161 (1): 184–212. doi:10.1111/j.1096-3642.2009.00629.x.
[edit] External links
- Bystrow, A.P. Kotlassia prima Amalitzky. Bulletin of the Geological Society of America, Washington, 1944, v.55, N5, pp.379-416.
- Seymouriamorpha - at Paleos
- Seymouriamorpha at Tree of Life Web Project
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