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Middle Ordovician (Whiterockian) gastropods of western Newfoundland: Macluritoidea and Euomphaloidea

Published online by Cambridge University Press:  14 July 2015

David M. Rohr  and
E. A. Measures
David M. Rohr
Affiliation:
Sul Ross State University, Alpine, TX 79832,
E. A. Measures
Affiliation:
Sul Ross State University, Alpine, TX 79832,
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Abstract

Gastropods that occur in the Anomalorthis brachiopod zone in the Spring Inlet Member of the Table Point Formation and in the Orthidiella brachiopod zone of the Shallow Bay Formation of the Cow Head Group are documented. Gastropods from western Newfoundland comprise part of the Toquima-Table Head fauna, and six of the seven genera described here are also found in Whiterockian strata of Nevada. Four species assigned to Monitorella Rohr, 1994, Maclurites Le Sueur, 1818, and Malayaspira Kobayashi, 1958, originally described by E. Billings in 1865 from Middle Ordovician (Whiterockian) strata of Newfoundland are revised. Five species of Helicotoma Salter, 1859, Malayaspira Kobayashi, 1958; Lytospira Koken, 1896; Rossospira Rohr, 1994; and Pachystrophia Perner, 1903, not previously reported from Newfoundland are also described. The probable opercula of Monitorella crenulata (Billings, 1865), and Maclurites emmonsi (Billings, 1865), are also illustrated for the first time.

Type
Research Article
Information
Journal of Paleontology , Volume 75 , Issue 2 , March 2001 , pp. 284 - 294
Copyright
Copyright © The Paleontological Society 2001

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