Also known as Styxosaurus snowii referred specimen locality

Where: Logan County County, Kansas (38.8° N, 100.7° W: paleocoordinates 42.0° N, 67.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Santonian (86.3 - 83.6 Ma)

• Spinaptychus sternbergi or Hesperornis zone (Carpenter 1999: for type locality, which is sme horizon according to Williston 1906)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by Mudge and Williston in 1874; reposited in the YPM

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 117841: authorized by Roger Benson, entered by Roger Benson on 27.09.2011

Creative Commons license: CC BY (attribution)