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GSA Bulletin; September 2001; v. 113; no. 9; p. 1229-1233; DOI: 10.1130/0016-7606(2001)113<1229:TRMFVE>2.0.CO;2
© 2001 Geological Society of America
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The reptile Macroleter: First vertebrate evidence for correlation of Upper Permian continental strata of North America and Russia

Robert R. Reisz*,1 and Michel Laurin{dagger},2

1 Department of Zoology, Erindale Campus, University of Toronto, Mississauga, Ontario L5L 1C6, Canada
2 Institut für Paläontologie, Naturhistorisches Forschungsinstitut, Museum für Naturkunde, Zentralinstitut der Humboldt- Universität zu Berlin, Invalidenstrasse 43, D-10115 Berlin, Germany

The spectacular evolutionary history of terrestrial vertebrates is uncharacteristically poorly documented between the Paleozoic subequatorial exposures of the Permo–Carboniferous of North America and Europe, and the much higher latitude, Upper Permian deposits of central Russia and southern Africa. We report here that the discovery of the reptile Macroleter in Oklahoma provides the first direct vertebrate evidence of biochronological correlation between continental sediments from the Upper Permian of North America and Russia. The presence of the reptile Macroleter, a member of a major group of Upper Permian amniotes known previously only from central Russia, in North America improves dramatically our understanding of this early phase of amniote evolution, and also provides evidence of terrestrial tetrapod faunal interchange between North America and Russia in Late Permian time.

Key Words: paleobiogeography • paleontology • Permian • terrestrial reptile




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