[dinosaur] Colymbosaurus (Plesiosauria) from Upper Jurassic of European Russia

Ben Creisler
[email protected]


A new paper:

Maxim S. Arkhangelsky, Nikolay G. Zverkov, Mikhail A. Rogov, Ilya M.
Stenshin & Evgeniya M. Baykina (2019)
Colymbosaurines from the Upper Jurassic of European Russia and their
implication for palaeobiogeography of marine reptiles.
Palaeobiodiversity and Palaeoenvironments (advance online publication)
DOI: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1007_s12549-2D019-2D00397-2D0&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=NMyGjd0R-TwKWFwnkrWi60sAIgkBXZn3EX05T4aRJrA&s=FkqV39iGWfhgCnSYVVFYfnXEqs41n3rVTIiwYeyyo9c&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__link.springer.com_article_10.1007_s12549-2D019-2D00397-2D0&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=NMyGjd0R-TwKWFwnkrWi60sAIgkBXZn3EX05T4aRJrA&s=Uoju9kOswnKe2k0mVsr42ca2YQUF-5XEhHstTlAcUgA&e= 


Plesiosaur specimens from the Upper Jurassic of European Russia are mainly
referable to the genus Colymbosaurus Seeley, 1874, based on elongated
propodials with extensive posterodistal expansion, and relatively short
mid-cervical vertebrae. However, a historical specimen described by
Bogolubov (1911) and subsequently revised as Plesiosauria indet. (Storrs et
al. 2000) was hitherto the only and ambiguous evidence for the presence of
Colymbosaurus in the Upper Jurassic of European Russia. Here, we provide
descriptions of several specimens from the Volgian of European Russia
referable to Colymbosaurus sp. and Colymbosaurinae indet. The presence of
Colymbosaurus in the Late Jurassic (Volgian/Tithonian) of the Middle
Russian Sea makes it possible to formulate hypotheses on herpetophauna
exchange between NW Europe, Svalbard and European Russia. Found only in
these basins, Colymbosaurus is a unifying element of marine herpetofauna in
the Panboreal palaeobiogeographic superrealm.

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