Where: Logan County, Kansas (38.8° N, 100.9° W: paleocoordinates 42.1° N, 67.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Late/Upper Santonian (85.8 - 83.5 Ma)

• Smoky Hill Chalk Member of the Niobrara Chalk Formation

• bed-level stratigraphic resolution

Environment/lithology: marine; chalk

Size class: macrofossils

Collected by M. C. Bonner

• Accessioned to the museum in April 1969

Primary reference: J. Lindgren, M. W. Caldwell, T. Konishi and L. M. Chiappe. 2010. Convergent evolution in aquatic tetrapods: insights from an exceptional fossil mosasaur. PLoS One 5(8):e11998 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 118338: authorized by Philip Mannion, entered by Philip Mannion on 12.10.2011

Creative Commons license: CC BY (attribution)