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      Morphological and molecular data on a new species of Plagiorhynchus Lühe, 1911 (Acanthocephala: Plagiorhynchidae) from the long-billed curlew (Numenius americanus) from northern Mexico.

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          Abstract

          A new species of the genus Plagiorhynchus Lühe, 1911 from the intestine of the long-billed curlew (Numenius americanus) from northern Mexico is described. Plagiorhynchus (Plagiorhynchus) aznari n. sp. is morphologically distinguished from other congeneric species from the Americas by having a trunk expanded anteriorly and a cylindrical proboscis, armed with 19 longitudinal rows of hooks, with 14-15 hooks each row. Nearly complete sequences of the small subunit and large subunit of the nuclear ribosomal DNA of the new species were determined and compared with available sequences from GenBank. Phylogenetic analyses inferred from the two molecular markers consistently showed that P. (Plagiorhynchus) aznari n. sp. is closely related to P. (Plagiorhynchus) allisonae, and this clade is sister to a clade formed by P. (Prosthorhynchus) transversus and P. (Prosthorhynchus) cylindraceus from Plagiorhynchidae. The new species represents the second record of the genus in Mexico and the fourth species in the Americas. The phylogenetic relationships among the members of the order Polymorphida in this study provide significant insights into the evolution of ecological associations between parasites and their definitive hosts. Our analyses suggest that the colonization of marine mammals, fish-eating birds and waterfowl in Polymorphidae might have occurred independently, from a common ancestor of Centrorhynchidae and Plagiorhynchidae that colonized terrestrial birds and mammals.

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          Author and article information

          Journal
          J Helminthol
          Journal of helminthology
          Cambridge University Press (CUP)
          1475-2697
          0022-149X
          Jul 22 2019
          : 94
          Affiliations
          [1 ] Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Avenida Universidad 3000, Ciudad Universitaria, CP 04510, Mexico City, Mexico.
          [2 ] Division of EcoScience, Ewha Womans University, Seoul 03760, Republic of Korea.
          [3 ] Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS - CCT CONICET - CENPAT), Güemes 1030, 8520 San Antonio Oeste, Río Negro, Argentina.
          [4 ] Cátedras CONACyT, Instituto de Ecología, A.C., Red de Estudios Moleculares Avanzados, Carretera antigua a Coatepec 351, El Haya, Xalapa 91070, Veracruz, Mexico.
          Article
          S0022149X19000543
          10.1017/S0022149X19000543
          31328706
          4ff02613-0f8b-4b82-a492-cad02c8d4685
          History

          new species,Acanthocephala,LSU rDNA,Plagiorhynchidae,Plagiorhynchus,SSU rDNA,systematic,taxonomy

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