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      A new species of Spauligodon (Nematoda: Pharyngodonidae) in Sceloporus (Squamata: Phrynosomatidae) from the Reserve of the Biosphere Barranca de Metztitlán, Hidalgo, Mexico Translated title: Una especie nueva de Spauligodon (Nematoda: Pharyngodonidae) en Sceloporus (Squamata: Phrynosomatidae) de la Reserva de la Biosfera Barranca de Metztitlán, Hidalgo, México

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          Abstract

          A new species of Spauligodon collected from the digestive tract of Sceloporus minor and Sceloporus grammicus is described. The species is assigned to Spauligodon because the caudal alae start at the level of the precloacal papillae and embed the adcloacal papillae. The species described herein is most similar to S. garciaprietoi, S. goldbergi, and S. mearnsi because all of them present spicules; diagnostic traits include having male worms with 1-5 spines in the tail, tripartite lateral alae with 5 ridges, females with spines in the tail and eggs that are fusiform. Spauligodon lamothei n. sp. was found in 4 of 9 individuals of S. minor and 1 of 5 individuals of S. grammicus. This species is the tenth recorded in the neotropics and the third from Mexico.

          Translated abstract

          Se describe una especie nueva de Spauligodon colectada del tubo digestivo de Sceloporus minor y Sceloporus grammicus. La especie fue asignada a Spauligodon porque el ala caudal inicia al nivel de la papila precloacal y la papilla adcloacal está embebida en la misma. La especie que se describe es similar a S. garciaprietoi, S. goldbergi, y S. mearnsi porque todas presentan espículas, los machos presentan de 1-5 espinas en la cola, ala lateral tripartita con 5 crestas, las hembras presentan espinas en la cola, y huevos fusiformes. Spauligodon lamothei n. sp. se encontró en 4 de 9 ejemplares de S. minor y en 1 de 5 individuos de S. grammicus. Esta especie representa el décimo registro en el neotrópico y el tercero de México.

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          Most cited references 11

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          GASTROINTESTINAL HELMINTHS OF SEVEN SPECIES OF SCELOPORINE LIZARDS FROM MEXICO

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            Gastrointestinal Helminths of Yarrow's Spiny Lizard Sceloporus jarrovii (Phrynosomatidae) in Mexico

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              Helminth infracommunity structure of the sympatric garter snakes Thamnophis eques and Thamnophis melanogaster from the Mesa Central of Mexico.

              Seventy-two Mexican garter snakes (Thamnophis eques) and 126 black-bellied garter snakes (T. melanogaster) were collected from 4 localities of the Mesa Central of Mexico between July 1996 and February 1998 and examined for helminths. Both species of garter snakes occurred sympatrically in every locality except in Lake Cuitzeo. Both species of snakes shared 9 helminth species, and in general, T. melanogaster hosted a larger number of species than T. eques. In each locality, a different helminth species showed the highest levels of prevalence and abundance (Spiroxys susanae in Ciénaga de Lerma, Telorchis corti in Lago de Pátzcuaro, Proteocephalus variabilis in Lago de Cuitzeo, and Contracaecum sp. in Lago de Chapala). Helminth communities in garter snakes of the Mesa Central are depauperate and dominated by a single parasite species. In those localities where the snakes occurred in sympatry, helminth communities were, in general, more diverse and species-rich in T. melanogaster. Differences in the ecology and physiology of these species of garter snakes may explain this pattern because black-bellied garter snakes (T. melanogaster) are more aquatic than Mexican garter snakes (T. eques) and primarily eat aquatic prey, potentially exposing themselves to a larger number of helminths transmitted by predator-prey infection. The helminth infracommunities of garter snakes in the Mesa Central of Mexico show a strong Nearctic influence because most of the species infecting these hosts have been recorded in other Nearctic colubrid snakes. However, the helminth infracommunities of these garter snakes are less species-rich and less diverse than those in colubrid snakes in more temperate latitudes. The widespread ecological perturbation of sampling sites in the Mesa Central because of human activity, and geographic differences in foraging ecology of the hosts and, thus, exposure to parasites transmitted by intermediate hosts may help to explain these patterns.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México )
                2007-8706
                August 2008
                : 79
                : suppl ago
                : 129-133
                Affiliations
                [1 ] Universidad Autónoma del Estado de Hidalgo Mexico
                Article
                S1870-34532008000300018

                http://creativecommons.org/licenses/by/4.0/

                Product
                Product Information: SciELO Mexico
                Categories
                Biodiversity Conservation

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