LACM 5539 locality, Rooks County (Cretaceous of the United States)

Also known as Tylosaurus kansasensis paratype

Where: Rooks County, Kansas (39.2° N, 99.3° W: paleocoordinates 41.0° N, 65.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Late/Upper Coniacian (89.3 - 85.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; chalk

Size class: macrofossils

Collected by J. D. Stewart in 1966; reposited in the LACM

Primary reference: M. J. Everhart. 2005. Tylosaurus kansasensis, a new species of tylosaurine (Squamata, Mosasauridae) from the Niobrara Chalk of western Kansas, USA. Netherlands Journal of Geosciences — Geologie en Mijnbouw 84(3):231-240 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 118151: authorized by Philip Mannion, entered by Philip Mannion on 06.10.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Mosasauridae
Tylosaurus kansasensis Everhart 2005 mosasaur
LACMNH 127815 - paratype (complete skull, vertebrae and limb elements).