Hydralmosaurus

Hydralmosaurus; Temporal range: Late Cretaceous, 84–80.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Missing taxonomy template (fix):	Hydralmosaurus serpentinus
Synonyms
	Elasmosaurus serpentinus Cope, 1877;

Hydralmosaurus (meaning "salt water lizard") is a genus of elasmosaurid plesiosaur. It is known only from a single specimen discovered in Late Cretaceous (late Santonian - early Campanian age) rocks of Nebraska, USA.^[1] Hydralmosaurus was coined as a new genus for "Elasmosaurus" serpentinus in 1943 by Samuel Paul Welles.^[2] A 2016 study found it to be synonymous with Styxosaurus.^[3]

References

^ Carpenter, K. (1999). "Revision of North American elasmosaurs from the Cretaceous of the western interior." Paludicola, 2(2): 148-173.
^ Welles, Samuel P. (1943). "Elasmosaurid plesiosaurs with description of new material from California and Colorado". Memoirs of the University of California. 13 (3): 125–254.
^ Otero RA. (2016) Taxonomic reassessment of Hydralmosaurus as Styxosaurus: new insights on the elasmosaurid neck evolution throughout the Cretaceous. PeerJ 4:e1777 https://doi.org/10.7717/peerj.1777

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