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Science 10 June 1983:
Vol. 220. no. 4602, pp. 1151 - 1153
DOI: 10.1126/science.220.4602.1151
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Articles

An Ictidosaur Fossil from North America

SANKAR CHATTERJEE 1

1 The Museum, Texas Tech University, Lubbock 79409

Teeth of a North American ictidosaur, Pachygenelus milleri, n. sp., found in the Upper Triassic Dockum Group of Texas, indicate that it is very similar to Pachygenelus monus of South Africa and Chaliminia musteloides of South America. The presence of a Gondwana element in the Northern Hemisphere attests to the ease of dispersal of the Late Triassic vertebrates through Pangea. Ictidosaurs are small, highly advanced, carnivorous cynodonts that display a mosaic of reptilian and mammalian features in the masticatory apparatus. They were contemporaneous with early mammals and probably closely related to them.

Submitted on December 28, 1982
Revised on February 17, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
ELLIOTHERIUM KERSTENI, A NEW TRITHELEDONTID FROM THE LOWER ELLIOT FORMATION (UPPER TRIASSIC) OF SOUTH AFRICA.
C. A. SIDOR and P. J. HANCOX (2006)
Journal of Paleontology 80, 333-342
   Abstract »    Full Text »    PDF »
A NEW TEMNOSPONDYL AMPHIBIAN FROM THE LATE TRIASSIC OF TEXAS.
(2000)
Journal of Paleontology 74, 670-683
New Fossil Evidence on the Sister-Group of Mammals and Early Mesozoic Faunal Distributions.
N. H. Shubin, N. H. SHUBIN, A. W. CROMPTON, H.-D. SUES, and P. E. OLSEN (1991)
Science 251, 1063-1065
   Abstract »    PDF »


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