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A new species of Creptotrema (Allocreadiidae) in Cambeva davisi (Siluriformes) from river streams in fragments of the Atlantic Rainforest, southern Brazil

Published online by Cambridge University Press:  11 November 2024

A. Aguiar Open the ORCID record for A. Aguiar [Opens in a new window] ,
M. B. Ebert Open the ORCID record for M. B. Ebert [Opens in a new window] ,
G.P. Gomes ,
G.M. Teixeira Open the ORCID record for G.M. Teixeira [Opens in a new window] ,
G.A. de Souza Open the ORCID record for G.A. de Souza [Opens in a new window]  and
R.J. da Silva Open the ORCID record for R.J. da Silva [Opens in a new window]
A. Aguiar
Affiliation:
Laboratório de Herpetologia, Departamento de Biodiversidade, Instituto de Biociências, UNESP - Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil Programa de Pós Graduação em Ciências Biológicas, UEL – Universidade Estadual de Londrina, Londrina, Paraná, Brazil
M. B. Ebert*
Affiliation:
Laboratório de Parasitologia de Animais Silvestres, Setor de Parasitologia, Instituto de Biociências, UNESP – Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
G.P. Gomes
Affiliation:
Laboratório de Invertebrados Aquáticos e Simbiontes, Departamento de Biologia Animal e Vegetal, Centro de Ciências Biológicas, UEL – Universidade Estadual de Londrina, Londrina, Paraná, Brazil
G.M. Teixeira
Affiliation:
Laboratório de Invertebrados Aquáticos e Simbiontes, Departamento de Biologia Animal e Vegetal, Centro de Ciências Biológicas, UEL – Universidade Estadual de Londrina, Londrina, Paraná, Brazil
G.A. de Souza
Affiliation:
Laboratório de Paleobiologia e Paleogeografia Antártica, Departamento de Geologia e Paleontologia, Museu Nacional-Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristóvão, Rio de Janeiro, Rio de Janeiro, Brazil
R.J. da Silva
Affiliation:
Laboratório de Parasitologia de Animais Silvestres, Setor de Parasitologia, Instituto de Biociências, UNESP – Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
*
Corresponding author: M.B. Ebert; Email: [email protected]
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Abstract

We described Creptotrema cambeve n. sp. from the intestine of the Brazilian catfish Cambeva davisi (Haseman, 1911) (= Trichomycterus davisi) based on integrative analyses using morphological and molecular approaches. Creptotrema cambeve n. sp. closely resembles morphologically Creptotrema paraense Vicente, Santos & Souza, 1978, which was described from a siluriform fish in Northern Brazil; however, the two species differ mainly in the oral and ventral sucker sizes and the distribution of the vitellaria. The phylogenetic analyses of the 28S rDNA placed the sequences of the new species in a monophyletic clade together with all other Creptotrema spp. and as sister taxon of Creptotrema cruste Alcantara, Ebert, Ferreira-Silva, Forti, Morais, Pérez-Ponce de León & Silva, 2024, a parasite from a Brazilian anuran. Genetic divergences between the new species and other Creptotrema spp. varied from 0.2% to 4.3%, further corroborating the distinction of the new taxon. Creptotrema cambeve n. sp. is the 18th nominal Creptotrema species known from South America and the 22nd erected in the genus. This is the first study reporting a trematode in Cambeva spp. hosts and the second parasitological survey carried out for Ca. davisi, a poorly known small endemic fish.

Keywords

digeneafreshwater fishesparasitism28S rDNAconserved Atlantic rainforest fragment
Type
Research Paper
Information
Journal of Helminthology , Volume 98 , 2024 , e71
Copyright
© The Author(s), 2024. Published by Cambridge University Press

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