Biology:Tengrisaurus

From HandWiki
Short description: Extinct genus of reptiles

Tengrisaurus
Temporal range: Barremian-Aptian
~127–119 Ma
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Sauropodomorpha
Clade: Sauropoda
Clade: Macronaria
Clade: Titanosauria
Clade: Lithostrotia
Genus: Tengrisaurus
Averianov & Skutschas, 2017
Type species
Tengrisaurus starkovi
Averianov & Skutschas, 2017

Tengrisaurus (meaning "Tengri lizard") is a genus of lithostrotian sauropod, from the Early Cretaceous (Barremian-Aptian) Murtoi Formation, Russia . It was described in 2017 by Averianov & Skutschas. The type species is T. starkovi.[1] New remains were described in 2021 by Averianov, Sizov & Skutschas.[2]

Description

Tengrisaurus starkovi is based on three caudal vertebrae. The genus is characterized by strongly procoelous anterior and middle caudal vertebrae, with strongly developed pre-epipophyses, highly pneumatic neural spine, and solid bone structure of the centrum.[1]

Classification

Averianov and Efimov (2018) recovered Tengrisaurus as a lithostrotian titanosaur. They found Lithostrotia to be divided into two main lineages, one containing Saltasauridae, the other containing Lognkosauria, with Tengrisaurus belonging to the former. The following cladogram follows their analysis.[3]

Lithostrotia

Malawisaurus

Aeolosaurus

Nemegtosaurus

Rapetosaurus

Tapuiasaurus

Tengrisaurus

Isisaurus

Saltasauridae

Pitekunsaurus

Volgatitan

Epachthosaurus

Muyelensaurus

Rinconsaurus

Lognkosauria

References

  1. 1.0 1.1 Averianov, A.; Skutschas, P. (2017). "A new lithostrotian titanosaur (Dinosauria, Sauropoda) from the Early Cretaceous of Transbaikalia, Russia". Biological Communications 62 (1): 6–18. doi:10.21638/11701/spbu03.2017.102. https://biocomm.spbu.ru/article/view/4/9. 
  2. Averianov, A. O.; Sizov, A. V.; Skutschas, P. P. (2021). "Gondwanan affinities of Tengrisaurus, Early Cretaceous titanosaur from Transbaikalia, Russia (Dinosauria, Sauropoda)". Cretaceous Research 122: Article 104731. doi:10.1016/j.cretres.2020.104731. 
  3. Averianov, Alexander; Efimov, Vladimir (2018). "The oldest titanosaurian sauropod of the Northern Hemisphere". Biological Communications 63 (6): 145–162. doi:10.21638/spbu03.2018.301. https://biocomm.spbu.ru/article/view/1077/2900. 

Wikidata ☰ Q29785692 entry