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Middle Devonian Crinoids from Western Maryland
Roger K. Pabian and Harrell L. Strimple
Journal of Paleontology
Vol. 50, No. 4 (Jul., 1976), pp. 759-762
Published by: SEPM Society for Sedimentary Geology
Stable URL: http://www.jstor.org/stable/1303668
Page Count: 4
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Eight specimens of Lasiocrinus sp. cf. L. scoparius (Hall) and four specimens of Arthroacantha sp. cf. A. punctobrcchiata (Hall) on slabs are the first crinoids reported from the Marcellus Shale (Middle Devonian) of Maryland. The dorsal cup of L. scoparius from the Marcellus differs from typical L. scoparius in older rocks in New York and suggests a trend to shortening of the cup.
Journal of Paleontology © 1976 SEPM Society for Sedimentary Geology