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Maclurina manitobensis (Whiteaves) (Ordovician Gastropoda): the largest known Paleozoic gastropod

Published online by Cambridge University Press:  20 May 2016

David M. Rohr ,
Robert B. Blodgett  and
William M. Furnish
David M. Rohr
Affiliation:
Department of Geology, Sul Ross State University, Alpine, Texas 79832
Robert B. Blodgett
Affiliation:
Branch of Paleontology and Stratigraphy, U.S. Geological Survey, Reston, Virginia 22092
William M. Furnish
Affiliation:
Department of Geology, University of Iowa, Iowa City 52242
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Abstract

The concept of the Ordovician gastropod genus Maclurites Le Sueur, 1818, at present includes much variation. Maclurina Ulrich in Ulrich and Scofield, 1897, is removed as a subjective synonym of Maclurites and reestablished as a separate genus. Species of Maclurites with spiral grooves on the outer whorl surface and a relatively small umbilicus are transferred to Maclurina. Maclurina manitobensis (Whiteaves, 1890) forms a distinctive part of the Late Ordovician-age “Arctic Ordovician fauna.” An unusually large specimen (25 cm in diameter) from the Bighorn Dolomite (Upper Ordovician), Wyoming, is illustrated; this Wyoming specimen is the volumetrically largest Paleozoic gastropod ever reported.

Type
Research Article
Information
Journal of Paleontology , Volume 66 , Issue 6 , November 1992 , pp. 880 - 884
Copyright
Copyright © The Paleontological Society 

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