Seymouriamorpha

Taxobox
name = Seymouriamorpha
fossil_range = Early Permian - Late Permian

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image_width = 250px
image_caption = "Seymouria" from the Early Permian of North America
regnum = Animalia
phylum = Chordata
subphylum = Vertebrata
superclassis = Tetrapoda
superordo = Reptiliomorpha
ordo = Anthracosauria
subordo = Seymouriamorpha
subordo_authority = Watson, 1917
subdivision_ranks = Clades & Species
subdivision ="Discosauriscidae"
"Kotlassidae"
"Seymouriidae"
"Waggoneriidae"

Seymouriamorpha are a small but widespread group of reptiliomorphs. Many seymouriamorphs were terrestrial or semi-aquatic. However, small aquatic larvae bearing external gills were 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.

Taxonomy

*Reptiliomorpha
*Order Seymouriamorpha
**"Urumqia"
**"Utegenia"
**Family Kotlassiidae
***"Buzulukia"
***"Bystrowiana"
***"Karpinskiosaurus"
***"Kotlassia"
**Family Discosauriscidae
***"Makowskia"
***"Discosauriscus"
**"Ariekanerpeton"
**Family Seymouriidae
***"Gnorhinosuchus"
***"Nyctiboetus"
***"Rhinosauriscus"
***"Seymouria"

External links

* [http://bulletin.geoscienceworld.org/cgi/content/abstract/55/4/379 Bystrow, A.P. "Kotlassia prima" Amalitzky. Bulletin of the Geological Society of America, Washington, 1944, v.55, N5, pp.379-416.]
* [http://www.palaeos.com/Vertebrates/Units/190Reptilomorpha/190.300.html Seymouriamorpha] - at Paleos