Trego County (YPM) (Cretaceous to of the United States)

Also known as Platecarpus planifrons referred material

Where: Trego County, Kansas (38.8° N, 100.1° W)

• Paleocoordinates: 45.3° N, 59.2° W (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Late/Upper Coniacian to Late/Upper Coniacian (89.3 - 83.5 Ma)

• lower part of member

• bed-level stratigraphic resolution

Environment/lithology: marine; chalk

Size class: macrofossils

Reposited in the YPM

Primary reference: T. Konishi and M. W. Caldwell. 2007. New specimens of Platecarpus planifrons (Cope, 1874) (Squamata: Mosasauridae) and a revised taxonomy of the genus. Journal of Vertebrate Paleontology 27(1):59-72 [M. Carrano/H. Street/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123572: authorized by Philip Mannion, entered by Philip Mannion on 26.01.2012

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Squamata - Mosasauridae
Platecarpus planifrons
Platecarpus planifrons Cope 1874 mosasaur
YPM 40508 (disarticulated and fragmentary cranial and postcranial material including premaxilla, left maxilla, nearly complete frontal, right jugal, ectopterygoid(?), pterygoids, left squamosal, left quadrate, lower jaw fragments, several vertebrae, and phalanges)