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A new species of Rhabdias (Nematoda: Rhabdiasidae), a lung parasite of Pseudopaludicola pocoto (Anura: Leptodactylidae) from north-eastern Brazil: description and phylogenetic analyses

Published online by Cambridge University Press:  03 November 2020

D.H. Morais*
Affiliation:
Universidade Federal de Uberlândia – UFU, Instituto de Ciências Agrárias, LMG-746, Km 1, Monte Carmelo38500-000, MG, Brazil
M.I. Müller
Affiliation:
UNESP – Univ. Estadual Paulista, Campus de Botucatu, Instituto de Biociências, Setor de Parasitologia, Av. Bento Lopes s/n Distrito de Rubião Junior CEP 18080-970, Botucatu, SP, Brazil Departamento de Ciências Biológicas, Universidade Federal de São Paulo (UNIFESP), Diadema, São Paulo, Brazil
F.T.V. Melo
Affiliation:
Laboratório de Biologia Celular e Helmintologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
A. Aguiar
Affiliation:
Laboratório de Herpetologia, Departamento de Zoologia, Instituto de Biociências de Rio Claro, Universidade Estadual Paulista – UNESP
Y. Willkens
Affiliation:
Laboratório de Biologia Celular e Helmintologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
C. de Sousa Silva
Affiliation:
Departamento de Biologia, Universidade Regional do Cariri – URCA, Rua Cel. Antônio Luis, 1161, CEP 63105-000, Pimenta, Crato, CE, Brazil
E.G. Giese
Affiliation:
Laboratório de Histologia e Embriologia Animal, Instituto da Saúde e Produção Animal, Universidade Federal Rural da Amazônia, Belém, Pará, Brazil;
R.W. Ávila
Affiliation:
Núcleo Regional de Ofiologia, Centro de Ciências, Universidade Federal do Ceará, Av. Humberto Monte, Pici, 60455-970, Bloco 902, Fortaleza, CE, Brazil
Reinaldo José da Silva
Affiliation:
UNESP – Univ. Estadual Paulista, Campus de Botucatu, Instituto de Biociências, Setor de Parasitologia, Av. Bento Lopes s/n Distrito de Rubião Junior CEP 18080-970, Botucatu, SP, Brazil
*
Author for correspondence: D.H. Morais, E-mail: [email protected]

Abstract

Rhabdias pocoto n. sp. is herein described from the lungs of the swamp frog Pseudopaludicola pocoto Magalhães, Loebmann, Nogueira, Kokubum, Baptista, Haddad & Garda, 2014, from the Caatinga biome in the state of Ceará, in north-eastern Brazil. The new species is characterized by a body that dilates posteriorly, six small lips (protuberances) and two rounded lateral expansions of cuticular inflation on the anterior end, each containing an amorphous gland-like structure inside and a short and conical tail. Additionally, molecular analysis and comparison of the partial mitochondrial cytochrome c oxidase I sequence of R. pocoto n. sp. revealed genetic divergence between the new species and the sequences of Rhabdias spp. previously deposited in GenBank. Phylogenetic analysis grouped the new taxon into the R. pseudosphaerocephala species complex + R. glaurungi clade. The new discovery represents the 19th species of Rhabdias spp. described in the Neotropical region, the ninth in Brazil and the first species of Rhabdias found parasitizing South American frogs of the genus Pseudopaludicola, as well as the first Caatinga biome species of Rhabdias.

Type
Review Article
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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