Sternberg Museum of Natural History Faculty Publications
 

Source Publication

Geologie en Mijnbouw/Netherlands Journal of Geosciences

Document Type

Article

Publication Date

1-1-2005

Volume

84

Issue

3

First Page

231

Last Page

240

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

DOI

10.1017/S0016774600021016

Abstract

Tylosaurus kansasensis sp. nov. is described herein on the basis of thirteen specimens collected from the Smoky Hill Chalk (upper Coniacian) of western Kansas, USA. The new species, originally designated Tylosaurus n. sp., co-occurred with T. nepaeolicus and exhibits a number of primitive characters that place it in a basal position in the mosasaur phylogeny. Among the key differences separating this species from other tylosaurines are a shortened, more rounded pre-dental process of the premaxilla, a distinctive quadrate lacking an infrastapedial process, and a parietal foramen located adjacent to the frontal-parietal suture.

Comments

This article was originally published in Netherlands Journal of Geosciences.

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