Temporal range: Late Triassic, 236–211.9 Ma
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.
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". They had a short and wide pubis, and had an ischium with extensive ventral lamina. In relation to the genus Lagosuchus, the genera had shorter thigh bones than shins.
- The Paleobiology Database: Lagerpetonidae}
- Sterling J. Nesbitt; Julia Brenda Desojo; Randall B. Irmis, eds. (2013). Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and Their Kin. The Geological Society of London. p. 164. Retrieved 29 March 2016.
- 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.
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