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Echinochiton dufoei: A New Spiny Ordovician chiton

Published online by Cambridge University Press:  14 July 2015

John Pojeta Jr. ,
D. J. Eernisse ,
R. D. Hoare  and
M. D. Henderson
John Pojeta Jr.
Affiliation:
U.S. Geological Survey, Museum of Natural History, Smithsonian Institution, Washington, DC 20560
D. J. Eernisse
Affiliation:
Department of Biological Sciences, California State University, Fullerton, California 92834
R. D. Hoare
Affiliation:
Department of Geology, Bowling Green State University, Bowling Green, Ohio 43403
M. D. Henderson
Affiliation:
Burpee Museum of Natural History, Rockford, Illinois 61103
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Abstract

Echinochiton dufoei new genus and species is described from the Ordovician age Forreston Member, Grand Detour Formation (Blackriveran) near Beloit, Wisconsin. For a variety of reasons, we regard E. dufoei as a chiton; the species is known from four articulated or partially articulated specimens, one of which has eight plates and two of which have a mucro on the tail plate. Echinochiton dufoei differs from other chitons in having large hollow spines that project from each of the known plates. In plate shape and position, E. dufoei is much like the Upper Cambrian species Matthevia variabilis Walcott, 1885, and the Lower Ordovician species Chelodes whitehousei Runnegar, Pojeta, Taylor, and Collins (1979).

Type
Research Article
Information
Journal of Paleontology , Volume 77 , Issue 4 , July 2003 , pp. 646 - 654
Copyright
Copyright © The Paleontological Society

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