Kingdom Animalia Clade Dinosauromorpha Rank Family | Class Reptilia Phylum Chordata | |
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Similar Dromomeron, Lagerpeton, Dinosauromorpha, Diodorus, Lewisuchus | ||
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.
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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". 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.
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.
Cladogram simplified after Cabreira et al., 2016: