FIRST REPORT OF COSTACOPLUMA COLLINS AND MORRIS, 1975 (DECAPODA: BRACHYURA: RETROPLUMIDAE) FROM THE EOCENE OF ALABAMA, U.S.A.

Rodney M. Feldmann; Roger W. Portell

doi:10.1651/S-2712.1

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Rodney M. Feldmann,¹ Roger W. Portell²

¹(RMF, correspondence) Department of Geology, Kent State University, Kent, Ohio 44242, U.S.A. ( ); rfeldman@kent.edu
²(RWP) Florida Museum of Natural History, P.O. Box 117800, University of Florida, Gainesville, Florida 32611-7800, U.S.A. ( ) portell@flmnh.ufl.edu

Abstract

Nine specimens of retroplumid crabs collected from the late early or early middle Eocene Tallahatta Formation in southern Alabama form the basis for description of a new species, Costacopluma grayi. The discovery confirms the extension of the range of the genus into the Eocene and represents the first occurrence of Costacopluma in the United States. As a result of the geologic range extension, the genus is now known to be contemporary with two other retroplumid genera, Retrocypoda, and Retropluma.

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Rodney M. Feldmann and Roger W. Portell "FIRST REPORT OF COSTACOPLUMA (DECAPODA: BRACHYURA: RETROPLUMIDAE) FROM THE EOCENE OF ALABAMA, U.S.A.," Journal of Crustacean Biology 27(1), 90-96, (1 January 2007). https://doi.org/10.1651/S-2712.1

Received: 27 January 2006; Accepted: 1 July 2006; Published: 1 January 2007

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