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Pseudothelphusa zongolicae (Decapoda, Pseudothelphusidae), a new species of freshwater crab from Veracruz, Mexico

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A new species of freshwater crab of the family Pseudothelphusidae from Zongolica, Veracruz, Mexico, is described. Only one previous report exists of a pseudothelphusid crab from the Zongolica region in central Veracruz, but that one belongs to a different tribe. The new species is placed in the genus Pseudothelphusa due to the evident torsion of the male gonopod and to the presence of the typical reniform caudo-marginal projection of Pseudothelphusa. The new species can be distinguished from its congeners by a gonopod with a caudo-marginal projection with a single large lobe, which extends proximally to reach beyond the middle of the gonopod’s principal axis, and a conical prominence with terminal pore setae on the distal crest of the caudo-lateral surface. The new species represents the 26th species of the genus with affinities with species from the Pacific versant of Mexico.

Affiliations: 1: Colección Nacional de Crustáceos, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-153, Mexico 04510, D.F., Mexico


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1. Alvarez F. , 1989. " Smalleyus tricristatus, new genus, new species, Pseudothelphusa parabelliana, new species (Brachyura: Pseudothelphusidae) from Los Tuxtlas, Veracruz, Mexico". Proc. biol. Soc. Washington, Vol 102: 45- 49.
2. Rodríguez G. , Hobbs H. H. Jr. , 1989. "Freshwater crabs associated with caves in southern Mexico and Belize, with descriptions of three new species (Crustacea: Decapoda)". Proc. biol. Soc. Washington, Vol 102: 394- 400.
3. Smalley A. E. , 1964. "A terminology for the gonopods of the American river crabs". Syst. Zool., Vol 13: 28- 31.
4. Villalobos J. L. , 2005. Sistemática de los cangrejos de agua dulce de México, Tribu Pseudothelphusini Ortmann, 1897 (Crustacea: Decapoda: Brachyura: Pseudothelphusidae). Análisis filogenético, biogeográfico y descripción de especies nuevas: 1-363. (Ph.D. Dissertation, Posgrado en Ciencias Biológicas, UNAM, Mexico).
5. Villalobos J. L. , Alvarez F. , 2008. "Los cangrejos de agua dulce de la familia Pseudothelphusidae (Decapoda: Brachyura: Eubrachyura) de México, con un apéndice de las especies citadas para América hasta 2006". In: Alvarez F. , Rodríguez-Almaraz G. (eds.), Crustáceos de México: Estado actual de su conocimiento: 1- 522. ( Universidad Autónoma de Nuevo León, Monterrey).
6. Villalobos J. L. , Alvarez F. , 2010. "Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda: Brachyura: Pseudothelphusidae)". Zool. Journ. Linn. Soc. London, Vol 160: 457- 481.

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