Lagerpetidae
| Lagerpetidae Temporal range: Late Triassic, 236–211.9 Ma | |
|---|---|
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| Dromomeron gregorii | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauromorpha |
| Family: | †Lagerpetidae Arcucci, 1986 |
| Genera | |
The Lagerpetidae (LAJ•er•pet•ih•DÆ, originally Lagerpetonidae) is a family of basal dinosauromorphs. Members of the family are known from Late Triassic of Argentina, Arizona, New Mexico, and Texas.[1][2]
Description
Lagerpetids are defined as being rather small (length of one hind limb being 25 centimetres (9.8 in)), with "very marked locomotor specializations", final presacral and anteriorly oriented vertebrae, a sacral including two vertebrae, a closed acetabulum, and an up facing ilium".[3] They had a short and wide pubis, and had an ischium with extensive ventral lamina.[3] In relation to the genus Lagosuchus, the genera had shorter thigh bones than shins.[3]
Classification
The lagerpetids were relatives of the dinosaurs, being a branch of the group Dinosauromorpha. The clade was named in a phylogenetic study by S. J. Nesbitt and colleagues in 2009.[1]
Cladogram simplified after Kammerer, Nesbitt & Shubin (2012):[4]
| Ornithodira |
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References
- 1 2 The Paleobiology Database: Lagerpetonidae}
- ↑ Sterling J. Nesbitt,Julia Brenda Desojo,Randall B. Irmis, ed. (2013). Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and Their Kin. The Geological Society of London. p. 164. Retrieved 29 March 2016.
- 1 2 3 Arcucci, Andrea (1986). "New materials and reinterpretation of Lagerpeton chanarensis Romer (Thecodontia, Lagerpetonidae nov.) from the Middle Triassic of La Rioja, Argentina" (PDF): 3. Retrieved 2010-04-28.
- ↑ Kammerer, C. F.; Nesbitt, S. J.; Shubin, N. H. (2012). "The First Silesaurid Dinosauriform from the Late Triassic of Morocco". Acta Palaeontologica Polonica 57 (2): 277. doi:10.4202/app.2011.0015.