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Macluritid opercula (Gastropoda) from the Middle Ordovician of Siberia and Alaska

Published online by Cambridge University Press:  14 July 2015

David M. Rohr  and
A. P. Gubanov
David M. Rohr
Affiliation:
Department of Geology, Sul Ross State University, Alpine, Texas 79832
A. P. Gubanov
Affiliation:
Institute of Geology, Novosibirsk 630090, Russia
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Abstract

Two occurrences of Middle Ordovician opercula belonging to the gastropod Maclurites are described, one from the Taimyr Peninsula, Siberia, and one from the Kuskokwim Mountains, Alaska. The Taimyr opercula are the first to be described from Russia. Like other opercula of the genus, these thick specimens have a relatively massive prong on the interior to which the retractor muscle was attached. The Alaskan specimens preserve a secondary muscle attachment site. The described occurrences of Maclurites opercula are summarized.

Type
Research Article
Information
Journal of Paleontology , Volume 71 , Issue 3 , May 1997 , pp. 394 - 400
Copyright
Copyright © The Paleontological Society 

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