W. G. Bourne Tylosaurus (Cretaceous to of the United States)

Where: Scott County, Kansas (38.5° N, 100.9° W: paleocoordinates 40.3° N, 66.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Niobrara Formation (Colorado Group), Turonian to Turonian (93.9 - 83.6 Ma)

• from "Kansas chalk" (presumably the Turonian to Santonian Niobrara Chalk)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified chalk

• "slabs" of "chalk"

Size class: macrofossils

Preservation: adpression

Collected by W. G. Bourne; reposited in the AMNH

Primary reference: H. F. Osborn. 1899. A complete mosasaur skeleton, osseous and cartilaginous. Memoirs of the American Museum of Natural History 1(4):165-188 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85963: authorized by John Alroy, entered by John Alroy on 22.01.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

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Reptilia
 Squamata - Mosasauridae
Tylosaurus dyspelor
Tylosaurus dyspelor Cope 1870 mosasaur