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Occurrence of Sievertsia (Echinodermata: Cyclocystoidea) from the Middle Devonian of northern Indiana

Published online by Cambridge University Press:  14 July 2015

Richard H. Fluegeman  and
R. William Orr
Richard H. Fluegeman
Affiliation:
Department of Geology, Ball State University, Muncie, Indiana 47306
R. William Orr
Affiliation:
Department of Geology, Ball State University, Muncie, Indiana 47306
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Extract

Cyclocystoids (range: Ordovician–Devonian), particularly of Devonian age, are extremely rare fossils and stratigraphic ranges of most taxa are little known. For this reason, the discovery of a single fragmentary specimen referable to Sievertsia (Smith and Paul, 1982) from the Traverse Formation (Middle Devonian) in Cass County, northern Indiana, deserves mention. Furthermore, the precise stratigraphic position of the cyclocystoid occurrence is documented by a combination of significant conodont and brachiopod faunas. The specimen was collected in situ on a weathered surface from a position approximately 1.2 m above the base of the type section of the Miami Bend Lithofacies (Cooper and Phelan, 1966, p. 6, U.S. National Museum Locality 391a; Orr, 1969, p. 338, Locality 5) exposed at the top of the west wall of the old France Stone Company quarry (inactive) on the north side of U.S. Highway 24, 3.2 km east of Logansport, SW¼, NE¼, sec. 27, T27N, R2E, Cass County, Indiana (Logansport 7½′ quadrangle).

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 64 , Issue 3 , May 1990 , pp. 480 - 482
Copyright
Copyright © The Paleontological Society 

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References

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