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Styxosaurus Welles 1943

PaleoDB taxon number: 36516

Synonym: Hydralmosaurus Welles 1943 (taxon 36478)

Full reference: S. P. Welles. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125-254

Parent taxon: Styxosaurinae according to R. A. Otero 2016

Sister taxa: Albertonectes, Elasmosaurus, Nakonanectes, Terminonatator

Subtaxa: Hydralmosaurus serpentinus, Styxosaurus browni, Styxosaurus snowii, Thalassonomosaurus marshii

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Type: Styxosaurus snowii