Lagerpetonidae
| Lagerpetidae Temporal range: Late Triassic, 236–211.9 Ma |
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| Dromomeron gregorii | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| 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.
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 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. A clade of lagerpetids was also recovered in the large phylogenetic analyses of early dinosaurs and other dinosauromorphs that were produced by Baron, Norman & Barrett (2017).
Cladogram simplified after Cabreira et al., 2016:
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