Alexeyisaurus

Alexeyisaurus Temporal range: Late Triassic, 210 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Genus:	†Alexeyisaurus Sennikov & Arkhangelsky, 2010
Species:	†A. karnoushenkoi
Binomial name
†Alexeyisaurus karnoushenkoi Sennikov & Arkhangelsky, 2010

Alexeyisaurus is an extinct genus of possible plesiosaur known from the upper Triassic (lower-middle Norian age) of Wilczek Formation, Wilczek Land, of Franz Josef Land, Russia.^[1] It was first named by A. G. Sennikov and M. S. Arkhangelsky in 2010 and the type species is Alexeyisaurus karnoushenkoi.^[1] While considered an elasmosaur in the initial publication, it has been described as a "partial, poorly preserved, and undiagnostic sauropterygian skeleton" in subsequent publications.^[2]

1. ^ ^{a b} A. G. Sennikov, M. S. Arkhangelsky (2010). "On a Typical Jurassic Sauropterygian from the Upper Triassic of Wilczek Land (Franz Josef Land, Arctic Russia)". Paleontological Journal. 44 (5): 567–572. Bibcode:2010PalJ...44..567S. doi:10.1134/S0031030110050126. S2CID 88505507.
2. ^ Wintrich, Tanja; Hayashi, Shoji; Houssaye, Alexandra; Nakajima, Yasuhisa; Sander, P. Martin (2017-12-01). "A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan". Science Advances. 3 (12) e1701144. Bibcode:2017SciA....3E1144W. doi:10.1126/sciadv.1701144. ISSN 2375-2548. PMC 5729018. PMID 29242826.

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