Mule Creek, 15 miles west of Edgemont (Cretaceous of the United States)

Where: Niobrara County, Wyoming (43.4° N, 104.2° W: paleocoordinates 49.5° N, 72.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Baculites sp. (weakly ribbed)-Baculites obtusus ammonoid zone, Sharon Springs Member (Pierre Shale Formation), Early/Lower Campanian (83.5 - 70.6 Ma)

• Ammonite Zone range of the Sharon Springs Member in Wyoming is Baculites sp. (weakly ribbed)-Baculites obtusus, Early Campanian according to Gill et al. 1972

• bed-level stratigraphic resolution

Environment/lithology: marine; gray shale

Size class: macrofossils

Collected by B. Brown in 1904; reposited in the AMNH

Collection methods: mechanical,

Primary reference: K. Carpenter. 1999. Revision of North American elasmosaurs from the Cretaceous of the Western Interior. Paludicola 2(2):148-173 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 77348: authorized by Matthew Carrano, entered by Matthew Carrano on 09.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sauropterygia - Elasmosauridae
Styxosaurus browni n. sp. Welles 1952 elasmosaur
AMNH 5835