Genus: Plesiosaurus non CONYBEARE, 1821

Species: (Polyptychodon) mexicanus WIELAND, 1910 (nomen dubium)
Etymology:

Holotype: UNAM IGM 9026

Locality: At a point north of Putla, 6 km south-southwest of Tlaxiaco, Mixteca, Oaxaca State, Southern most Mexico.

Horizon:

Biostratigraphy:

Age: Neocomian Subepoch, Early Cretaceous Subepoch, Early Cretaceous.

Material: Part of side of skull containing 5 upper and 5 lower teeth.


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