Seymouriamorpha

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Seymouriamorpha Fossil range: Early Permian - Late Permian
Seymouria from the Early Permian of North America
Scientific classification
Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Superclass: Tetrapoda Superorder: Reptiliomorpha Order: Anthracosauria Suborder: Seymouriamorpha Watson, 1917
Clades & Species
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. 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.

[edit] Taxonomy

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

[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