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      Decapod crustaceans from the Paleocene of Central Texas, USA Translated title: Crustáceos decápodos del Paleoceno de Texas central, EUA

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          Abstract

          Fourteen species of decapods crustaceans are described from a single locality near Mexia, Texas, where Paleocene sediments of the Mexia Clay Member of the Wills Point Formation crop out. The species are represented by Hoploparia sp., Linuparus wilcoxensis Rathbun, 1935, an unnamed paguroid, Kierionopsis nodosa Davidson, 1966, Pithonoton cardwelli new species, Caloxanthus sp., Macroacaena johnsoni (Rathbun, 1935), new combination, Raninoides bournei (Rathbun, 1928), R. treldenaesensis (Collins and Jakobsen, 2003), Prehepatus sp., Tehuacana americana (Rathbun, 1935), new combination, Costacopluma texana new species, Paraverrucoides alabamensis (Rathbun, 1935) and Viapinnixa mexiaensis new species. Morphological details unknown for previously described species are included. New systematic placements are offered based on recent research. Intraspecific morphological variation is documented for the goneplacoid crab Tehuacana americana. Costacopluma texana is the second Paleogene species of that genus in southeastern USA, and because of its abundance represents the most completely described species for the genus. This fauna represents one of the most diverse assemblages of Paleocene crustacean decapods.

          Translated abstract

          Se describen catorce especies de crustáceos decápodos colectados en una sola localidad cercana a Mexia, Texas, en donde afloran sedimentos del Miembro Arcilloso Mexia de la Formación Wills Point. Las especies están representadas por Hoploparia sp., Linuparus wilcoxensis Rathbun, 1935, un paguroideo indeterminado, Kierionopsis nodosa Davidson, 1966, Pithonoton cardwelli especie nueva, Caloxanthus sp., Macroacaena johnsoni (Rathbun, 1935), combinación nueva, Raninoides bournei (Rathbun, 1928), R. treldenaesensis (Collins y Jakobsen, 2003), Prehepatus sp., Tehuacana americana (Rathbun, 1935) combinación nueva, Costacopluma texana especie nueva, Paraverrucoides alabamensis (Rathbun, 1935) y Viapinnixa mexiaensis especie nueva. Se incluyen detalles morfológicos, no descritos para especies previamente reportadas. Se ofrece una sistemática actualizada, basada en investigaciones recientes. Se documenta la variación morfológica intraespecífica para el cangrejo goneplacoideo Tehuacana americana. Costacopluma texana es la segunda especie del género en el Paleógeno del sureste de EUA, y debido a la abundancia de ejemplares, es la especie descrita con mayor detalle del género Costacopluma. Esta fauna representa una de las asociaciones más diversas de crustáceos decápodos del Paleoceno.

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          Most cited references 147

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          Fossil Crustacea of the Atlantic and Gulf Coastal Plain

          (1935)
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            The oxystomatous and allied crabs of America

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              Histoire Naturelle des Crustacés, Comprenant l’Anatomie, la Physiologie et la Classification de ces Animaux

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                Author and article information

                Journal
                rmcg
                Revista mexicana de ciencias geológicas
                Rev. mex. cienc. geol
                Instituto de Geología, UNAM (México, DF, Mexico )
                1026-8774
                2007-2902
                December 2009
                : 26
                : 3
                : 745-763
                Affiliations
                Loma Linda California orgnameLoma Linda University orgdiv1Department of Earth and Biological Sciences U.S.A
                México DF orgnameUniversidad Nacional Autónoma de México orgdiv1Instituto de Geología Mexico vegver@ 123456unam.mx
                Statesboro GA orgnameGeorgia Southern University orgdiv1Department of Geology and Geography U.S.A.
                Article
                S1026-87742009000300015 S1026-8774(09)02600300015

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 104, Pages: 19
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                Product Information: website

                Crustacea, Texas, Paleocene, Paleoceno, Mexia

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