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Mazon Creek Cycloidea

Frederick R. Schram, Ronald Vonk and Cees H. J. Hof
Journal of Paleontology
Vol. 71, No. 2 (Mar., 1997), pp. 261-284
Published by: Paleontological Society
Stable URL: http://www.jstor.org/stable/1306460
Page Count: 24
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Mazon Creek Cycloidea
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Abstract

The Mazon Creek Cycloidea contain four taxa: Cyclus americanus Packard, 1885, Cyclus obesus, new species, Halicyne max, new species, and Apionicon apioides, new genus, new species. We conclude, based on a cladistic analysis, that cycloids are specialized maxillopodan crustaceans and a possible sister group to the Copepoda. They may have filled a niche similar to modernday crabs.

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