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The upper Paleozoic (Pennsylvanian-Permian) ammonoid Emilites

Published online by Cambridge University Press:  14 July 2015

Royal H. Mapes  and
Darwin R. Boardman
Royal H. Mapes
Affiliation:
Department of Geological Sciences, Ohio University, Athens 45701
Darwin R. Boardman
Affiliation:
Department of Geosciences, Texas Tech University, Lubbock 79409
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Abstract

Four species of Emilites are now known; these are E. incertus (Böse), E. plummeri Ruzhencev, E. brownwoodi n. sp., and E. bennisoni n. sp. Representatives of this genus may occur as early as Middle Pennsylvanian in North America to as late as Early Permian in the Soviet Union. All described taxa are from North America except E. plummeri, which is from the Soviet Union. Because Emilites is extremely rare in upper Paleozoic ammonoid assemblages, generic and species level phylogenetic relationships are poorly understood. Emilites is not considered to be a good generic-level zone indicator due to its relatively long time range and its rarity.

Information

Type
Research Article
Information
Journal of Paleontology , Volume 62 , Issue 1 , January 1988 , pp. 69 - 75
Copyright
Copyright © The Paleontological Society 

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