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Tengrisaurus
Tengrisaurus
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Tengrisaurus

Tengrisaurus
Temporal range: Valanginian-Hauterivian
~135–130 Ma
↓
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
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 (Valanginian-Hauterivian[1]) Murtoi Formation, Russia. It was described in 2017 by Averianov & Skutschas. The type species is T. starkovi.[2] New remains were described in 2021 by Averianov, Sizov & Skutschas.[3]

Description

[edit]

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.[2]

Classification

[edit]

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.[4]

Lithostrotia

References

[edit]
  1. ^ Averianov, A.O.; Sizov, A.V.; Grigoriev, D.V.; Pestchevitskaya, E.B.; Vitenko, D.D.; Skutschas, P.P. (2022). "New data on dinosaurs from the Lower Cretaceous Murtoi Formation of Transbaikalia, Russia". Cretaceous Research. 138 105287. Bibcode:2022CrRes.13805287A. doi:10.1016/j.cretres.2022.105287.
  2. ^ a b 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.
  3. ^ 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 104731. Bibcode:2021CrRes.12204731A. doi:10.1016/j.cretres.2020.104731. S2CID 233539964.
  4. ^ 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. hdl:11701/15099.
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