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Issue: Vol. 4216 No. 6: 11 Jan. 2017
Type: Article
Published: 2017-01-11
DOI: 10.11646/zootaxa.4216.6.3
Page range: 559–571
Abstract views: 107
PDF downloaded: 4

Three new species of freshwater crabs of the genus Pseudothelphusa (De Saussure, 1857) (Crustacea: Decapoda: Pseudothelphusidae) from Mexico

Programa de Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, México 04510, México.
Colección Nacional de Crustáceos, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-153, México 04510, México.
Colección Nacional de Crustáceos, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-153, México 04510, México.
Crustacea Pseudothelphusini Michoacán Guerrero

Abstract

Three new species of freshwater crabs of the genus Pseudothelphusa (De Saussure, 1857) from south-central Mexico are described: Pseudothelphusa acahuizotla n. sp., P. ixtapan n. sp., and P. purhepecha n. sp. The new species are included in Pseudothelphusa due to a male gonopod with torsion and the presence of the characteristic mesial process and caudomarginal projection. Pseudothelphusa acahuizotla n. sp. is morphologically similar to P. belliana Rathbun, 1898, but can be distinguished by the relative size of the distal lobe of the caudomarginal projection and by the presence of a conical tooth on the caudal surface of the mesial process of the male gonopod. Pseudothelphusa ixtapan n. sp. is similar to P. dilatata Rathbun, 1898, and P. morelosis Pretzmann, 1968, and can be distinguished by a mesial process of the male gonopod with only one lateral tooth and an inferior margin with small teeth. Pseudothelphusa puerhepechae n. sp. exhibits a mesial process of the male gonopod with two triangular spines on its lateral margin, a character that with some variations is present in P. nayaritae Álvarez & Villalobos, 1994, P. rechingeri Pretzmann, 1965, P. lophophallus Rodríguez & Smalley, 1969, and P. parabelliana Álvarez 1989; but it can be distinguished by the separation and shape of the two spines of the mesial process and the shape of the lobes of the caudomarginal projection. With the new species described herein there are now 29 species in the genus Pseudothelphusa.

 

References

  1. Álvarez, F. & Villalobos, J.L. (1996) Especie nueva de cangrejo de agua dulce del género Pseudothelphusa (Brachyura: Pseudothelphusidae) de Guerrero, México. Anales del Instituto de Biología, Universidad Nacional Autónoma de México, Serie Zoología, 67 (2), 297–302.

    Álvarez, F., Villalobos, J.L., Armendáriz, G. & Hernández, C. (2012) Relación biogeográfica entre cangrejos dulceacuícolas y acociles a lo largo de la zona mexicana de transición: revaluación de la hipótesis de Rodríguez (1986). Revista Mexicana de Biodiversidad, 83, 1073–1083.

    Cumberlidge, N., Álvarez, F. & Villalobos, J.L. (2014) Results of the global conservation assessment of the freshwater crabs (Brachyura, Pseudothelphusidae and Trichodactylidae): The Neotropical region, with an update on diversity. ZooKeys, 457, 133–157.
    https://doi.org/10.3897/zookeys.457.6598

    Cumberlidge, N., Ng, P.K.L., Yeo, D.C.J., Magalhaes, C., Campos, M.R., Álvarez, F., Naruse, T., Daniels, S.R., Esser, L.J., Attipoe, F.Y.K., Clotilde-Ba, F.L., Darwall, W., McIvor, A., Baillie, J.E.M., Collen, B. & Ram, M. (2009) Freshwater crabs and the biodiversity crisis: Importance, threats, status, and conservation challenges. Biological Conservation, 142, 1665–1673.
    https://doi.org/10.1016/j.biocon.2009.02.038

    García-Madrigal, M.S. & Bastida-Zavala, J.R. (1998) Variaciones morfométricas de Pseudothelphusa belliana (Decapoda: Pseudothelphusidae) en Michoacán, México. Revista de Biología Tropical, 46 (4), 921–927.

    Rathbun, M.J. (1898) A contribution to a knowledge of the fresh-water crabs of America. The Pseudothelphusinae. Proceedings of the United States National Museum, 21 (1158), 507–537.
    https://doi.org/10.5479/si.00963801.21-1158.507

    Rodríguez, G. (1982) Les crabes d’eau douce d’Amerique. Famille des Pseudothelphusidae. Faune Tropicale, 22, 1–223.

    Rodríguez, G. & Smalley, A.E. (1969) Los cangrejos de agua dulce de México de la familia Pseudothelphusidae (Crustacea, Brachyura). Anales del Instituto de Biología, Universidad Nacional Autónoma de México, Serie Ciencias del Mar y Limnología, 1, 69–112.

    Smalley, A.E. (1964) A terminology for the gonopods of the American river crabs. Systematic Zoology, 13, 28–31.
    https://doi.org/10.2307/2411434

    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. Ph.D. Dissertation, Facultad de Ciencias, Universidad Nacional Autónoma de México, 394 pp.

    Villalobos, J.L. & Álvarez, F. (2003) Two new species of freshwater crabs of the genus Tehuana (Brachyura: Pseudothelphusidae) from southern Mexico. Journal of Crustacean Biology, 23 (1), 223–229.
    https://doi.org/10.1163/20021975-99990329

    Villalobos, J.L. & Álvarez, F. (2008) Los cangrejos de la familia Pseudothelphusidae (Decapoda: Brachyura: Eubrachyura) de México, con un apéndice de las especies citadas para América hasta el 2006. In: Álvarez, F. & Rodríguez-Almaraz, G. (Eds.) Crustáceos de México: Estado Actual de su Conocimiento, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México, pp. 239–300.

    Villalobos, J.L. & Álvarez, F. (2010) Phylogenetic analysis of the Mexican freshwater crabs of the tribe Pseudothelphusini (Decapoda, Brachyura, Pseudothelphusidae). Zoological Journal of the Linnean Society, 160, 457–481.
    https://doi.org/10.1111/j.1096-3642.2009.00606.x

    Villalobos, J.L. & Álvarez, F. (2013) Two new genera and three new species of freshwater crabs (Crustacea: Pseudothelphusidae: Potamocarcinini) from Chiapas, Mexico. Zootaxa, 3599 (5), 457–470.
    https://doi.org/10.11646/zootaxa.3599.5.3