Lagerpetidae

Lagerpetidae
Temporal range: Late Triassic, 236–211.9 Ma
Dromomeron gregorii
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Clade:Dinosauromorpha
Family:†Lagerpetidae
Arcucci, 1986
Genera

The Lagerpetidae (/ˈlɑːdʒˌərpɛtɪˈdeɪ/; 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

Lagerpetid hunting in the landscape of the Late Triassic of southern Brazil.

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] 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).[4]

Cladogram simplified after Cabreira et al., 2016:[5]

Eucrocopoda

 

Euparkeria

 
 

Lagerpetidae

 

Lagerpeton

 
 

 

Ixalerpeton

 
 

Dromomeron

 
 
 
Dinosauriformes

 

Marasuchus

 
 

 

Pseudolagosuchus

 
 

Lewisuchus

 
 

Saltopus

 
 

Dinosauria

 
 
 
 
 

References

  1. 1 2 The Paleobiology Database: Lagerpetonidae}
  2. ↑ 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.
  3. 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.
  4. ↑ Baron, M.G.; Norman, D.B.; Barrett, P.M. (2017). "A new hypothesis of dinosaur relationships and early dinosaur evolution". Nature. 543: 501–506. doi:10.1038/nature21700.
  5. ↑ Cabreira, S.F.; Kellner, A.W.A.; Dias-da-Silva, S.; da Silva, L.R.; Bronzati, M.; de Almeida Marsola, J.C.; Müller, R.T.; de Souza Bittencourt, J.; Batista, B.J.; Raugust, T.; Carrilho, R.; Brodt, A.; Langer, M.C. (2016). "A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet". Current Biology. 26: 3090–3095. doi:10.1016/j.cub.2016.09.040. PMID 27839975.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.