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New morphological data for Eosaniwa Koehni Haubold, 1977 and a revised phylogenetic analysis

Published online by Cambridge University Press:  14 July 2015

Olivier Rieppel ,
Jack L. Conrad  and
Jessica A. Maisano
Olivier Rieppel
Affiliation:
1Department of Geology, Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, Illinois 60605,
Jack L. Conrad
Affiliation:
2Department of Paleontology, American Museum of Natural History, 79th Street at Central Park West, New York, New York 10024,
Jessica A. Maisano
Affiliation:
3Jackson School of Geosciences, the University of Texas, Austin, Texas 78712,
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Abstract

Eosaniwa koehni is an enigmatic platynotan that differs from related varanoids in the possession of a very long snout resulting in extremely elongate nasals and vomers; a robust and broad jugal; the presence of denticles on palatines, pterygoids, and vomers; the presence of a subdental shelf on the dentary; and a strongly twisted retroarticular process on the mandible. Phylogenetic analysis suggests that Eosaniwa is a derived varanoid platynotan, nested within a clade also including mosasauroids, Coniasaurus, and Paravaranus.

Type
Research Article
Information
Journal of Paleontology , Volume 81 , Issue 4 , July 2007 , pp. 760 - 769
Copyright
Copyright © The Paleontological Society 

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