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Caudal vertebrae of titanosaurian sauropod dinosaurs from the Lower Cretaceous Ilek Formation in Western Siberia, Russia. / Averianov, Alexander O.; Ivantsov, Stepan V.; Skutschas, Pavel P.
In: Cretaceous Research, Vol. 107, 104309, 03.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Caudal vertebrae of titanosaurian sauropod dinosaurs from the Lower Cretaceous Ilek Formation in Western Siberia, Russia
AU - Averianov, Alexander O.
AU - Ivantsov, Stepan V.
AU - Skutschas, Pavel P.
PY - 2020/3
Y1 - 2020/3
N2 - Three sauropod middle caudal vertebrae are described from the three different localities within the Lower Cretaceous (Barremian-Aptian) Ilek Formation in Krasnoyarsk Territory, Western Siberia, Russia. All vertebrae are strongly procoelous and can be referred to Lithostrotia indet. LMCCE 005/40 from Bol'shoi Kemchug 3 locality has a ventral groove on centrum and a very large neural spine that projects posteriorly far beyond the centrum. This specimen also lacks postzygapophyses and bears a heavily sculptured neural spine suggesting high degree of development of the interosseous ligaments. The structure of the neural spine LMCCE 005/40 is similar to that of the saltasaurine Neuquensaurus from the Late Cretaceous of South America. However, the Siberian specimen lacks camellate bone texture characteristic for the caudal vertebrae of Saltasaurinae and its similarity with Neuquensaurus in development of the neural spine likely was independently acquired. These new findings increase the known diversity of sauropod dinosaurs in the Early Cretaceous of Siberia, which includes three taxa of Lithostrotia indet. described herein, lithostrotian Tengrisaurus, and titanosauriform Sibirotitan.
AB - Three sauropod middle caudal vertebrae are described from the three different localities within the Lower Cretaceous (Barremian-Aptian) Ilek Formation in Krasnoyarsk Territory, Western Siberia, Russia. All vertebrae are strongly procoelous and can be referred to Lithostrotia indet. LMCCE 005/40 from Bol'shoi Kemchug 3 locality has a ventral groove on centrum and a very large neural spine that projects posteriorly far beyond the centrum. This specimen also lacks postzygapophyses and bears a heavily sculptured neural spine suggesting high degree of development of the interosseous ligaments. The structure of the neural spine LMCCE 005/40 is similar to that of the saltasaurine Neuquensaurus from the Late Cretaceous of South America. However, the Siberian specimen lacks camellate bone texture characteristic for the caudal vertebrae of Saltasaurinae and its similarity with Neuquensaurus in development of the neural spine likely was independently acquired. These new findings increase the known diversity of sauropod dinosaurs in the Early Cretaceous of Siberia, which includes three taxa of Lithostrotia indet. described herein, lithostrotian Tengrisaurus, and titanosauriform Sibirotitan.
KW - Cretaceous
KW - Dinosauria
KW - Russia
KW - Sauropoda
KW - Siberia
KW - Titanosauria
KW - SALTASAURINE TITANOSAUR
KW - PNEUMATICITY
KW - OSTEOLOGY
KW - PSITTACOSAURUS-SIBIRICUS
KW - NEUQUENSAURUS-AUSTRALIS
KW - PATAGONIA
KW - EVOLUTION
KW - REMAINS
KW - GEN.
UR - http://www.scopus.com/inward/record.url?scp=85075201559&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/c826ec76-ffe7-3ccf-a1d9-12d25da6daa9/
U2 - 10.1016/j.cretres.2019.104309
DO - 10.1016/j.cretres.2019.104309
M3 - Article
AN - SCOPUS:85075201559
VL - 107
JO - Cretaceous Research
JF - Cretaceous Research
SN - 0195-6671
M1 - 104309
ER -
ID: 49267055