Styxosaurus sp. schematic.

A marine reptile? In my deviantART? It's more likely than you think. One of multiple long-necked plesiosaurs from the Western Interior Seaway, as well as one of the largest elasmosaurs, Styxosaurus is often overshadowed by its close relative and group namer Elasmosaurus although the latter is smaller, and it's probably not surprising that I have very little to say about it, especially with how unfamiliar I am with marine reptiles in general ( would've managed a few more paragraphs, at least). Another former specimen of Hydralmosaurus (AMNH 5835, now S.brownii) was likely larger than AMNH 1495, surpassing 11 m, but less complete.

References:
-Williston S. W. (1890a). "Structure of the Plesiosaurian Skull". Science. 16 (405): 262. doi:10.1126/science.ns-16.405.262. JSTOR 1766513.
-Williston S. W. (1890b). "A New Plesiosaur from the Niobrara Cretaceous of Kansas". Transactions of the Annual Meetings of the Kansas Academy of Science. 12: 174–178. doi:10.2307/3623798.
-Welles, S. P. and Bump, J. 1949. Alzadasaurus pembertoni, a new elasmosaur from the Upper Cretaceous of South Dakota. Journal of Paleontology 23(5): 521-535.
-Otero RA. (2016) Taxonomic reassessment of Hydralmosaurus as Styxosaurus: new insights on the elasmosaurid neck evolution throughout the Cretaceous. PeerJ 4:e1777doi.org/10.7717/peerj.1777

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