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Ordovician Polyplacophora (Mollusca) from North America

Published online by Cambridge University Press:  11 August 2017

Richard D. Hoare  and
John Pojeta Jr.
Richard D. Hoare
Affiliation:
Department of Geology, Bowling Green State University, Bowling Green, Ohio 43403 and U.S. Geological Survey and Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560
John Pojeta Jr.
Affiliation:
Department of Geology, Bowling Green State University, Bowling Green, Ohio 43403 and U.S. Geological Survey and Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560
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Abstract

Abundant silicified polyplacophorans from numerous localities in the Ordovician in Kentucky and other localities in Virginia, Wisconsin, and Minnesota are described systematically. New species are: Spicuchelodes cressmani, Calceochiton floweri, Preacanthochiton baueri, Orthriochiton recavus, Helminthochiton blacki, H. marginatus, and Alastega martini; new genera and species are: Listrochiton weiri, Litochiton crebatus, and Amblytochiton incomptus; and new families are Litochitonidae and Alastegiidae. Hemithecella expansa Ulrich and Bridge in Butts, 1941 and Chelodes cf. C. mirabilis (Butts, 1926), from the Chepultepec Formation in Virginia are also described. Comparisons are made with Chelodes whitehousei Runnegar, Pojeta, Taylor, and Collins, 1979 from Australia and Calceochiton hachitae Flower, 1968 from New Mexico.

Listings of the fauna associated with the chitons are given for the Kentucky occurrences; taphonomic discussions of these are included.

Type
Research Article
Information
Journal of Paleontology , Volume 80 , Issue S64: Paleontological Society Memoir 64. Ordovician Polyplacophora (Mollusca) from North America , May 2006 , pp. 1 - 27
Copyright
Copyright © 2006, The Paleontological Society 

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