Where: Kansas (39.0° N, 101.2° W: paleocoordinates 42.0° N, 67.4° W)
• coordinate based on nearby landmark
When: Niobrara Formation, Late/Upper Coniacian to Late/Upper Coniacian (89.3 - 83.6 Ma)
• "Chalk of Logan County" (Williston 1906, p. 229).
•"Niobrara Cretaceous" (Welles 1943, p. 189).
•"Probably the Smoky Hill Chalk Member (Santonian-Campanian)" (Storrs 1999, p. 7)
Environment/lithology: marine; chalk
Size class: macrofossils
Collected by Mr H. T. Martin in 1889
Collection methods: quarrying
Primary reference: S. W. Williston. 1906. North American plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus. The American Journal of Science, series 4 21:221-236 [M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 117842: authorized by Roger Benson, entered by Roger Benson on 27.09.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
"Elasmosaurus marshii n. sp." = Thalassonomosaurus marshii
"Elasmosaurus marshii n. sp." = Thalassonomosaurus marshii Williston 1906 elasmosaur YPM 1645 (holotype)
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