References
Reference
Carpenter, Kenneth (1999) Revision of North American elasmosaurs from the Cretaceous of the Western Interior; Paludicila, 2(2), pp.148-173
Revision of North American elasmosaurs from the Cretaceous of the Western Interior
Principal Author
Kenneth Carpenter
Header
Academic paper
Journal
Paludicila
Volume
2
Issue
2
Pages
148-173
Abstract
A review of North American elasmosaurs from the Cretaceous of the Western Interior recognizes only five valid genera and species: Elasmosaurus platyurus, Hydralmosaurus serpentinus, Libonectes morgani, Styxosaurus snowii, and Thalassomedon hanningtoni. Alzadosaurus kansasensis, A. pembertoni and Thalassonomosaurza marshi form an ontogenetic series of Styxosaurus snowii from the Smoky Hill Chalk and Sharon Springs Member of the Pierre Shale. The holotype of the genus Alzadosaurus is synonyrnized with Thalassomedon, leaving "Alzadosaurus" columbiensis without a generic name, therefore a new name is proposed. A preliminary phyletic analysis of Pistosaurus, Plesiosauridae, Cryptoclididae, and Elasmosauridae is presented.
Language
English