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.
Document Type
Article
Source Publication
Geologie en Mijnbouw/Netherlands Journal of Geosciences
Version
Published Version
Publication Date
1-1-2005
Volume
84
Issue
3
First Page
231
Last Page
240
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This work is licensed under a Creative Commons Attribution 4.0 International License.
Rights
Notice: This material may be protected by copyright law (Title 17 U.S. Code).
Recommended Citation
Everhart, M. (2005). Tylosaurus kansasensis, a new species of tylosaurine (Squamata, Mosasauridae) from the Niobrara Chalk of western Kansas, USA. Netherlands Journal of Geosciences, 84(3), 231-240. doi:10.1017/S0016774600021016
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