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Issue: Vol. 5403 No. 1: 18 Jan. 2024
Type: Article
Published: 2024-01-18
DOI: 10.11646/zootaxa.5403.1.6
Page range: 91-103
Abstract views: 213
PDF downloaded: 9

Two new species of Diaphorocleidus and new data on D. affinis (Monogenoidea: Dactylogyridae) parasitizing Bryconops cf. affinis (Characiformes: Iguanodectidae) from the Munim River basin, State of Maranhão, northeastern Brazil

Programa de Pós-Graduação em Ciência Animal; Universidade Estadual do Maranhão; UEMA. Cidade Universitária Paulo VI; Avenida Lourenço Vieira da Silva 1000; 65055-310 São Luís; MA; Brazil
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil
Laboratório de Sistemática e Ecologia de Organismos Aquáticos; Centro de Ciências de Chapadinha; Universidade Federal do Maranhão (UFMA); Campus de Chapadinha; BR-222; KM 04; S/N; Chapadinha; MA; Brazil
Núcleo de Estudos Morfofisiológicos Avançados; Universidade Estadual da Região Tocantina do Maranhão. Campus Imperatriz; Rua Godofredo Viana 1300; 65901-480 Imperatriz; MA; Brazil
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil
Laboratório de Helmintos Parasitos de Peixes; Instituto Oswaldo Cruz; FIOCRUZ. Avenida Brasil 4365; 21040-360 Rio de Janeiro; RJ; Brazil
Pisces Characiform fishes Monogenoid parasites Neotropical Region

Abstract

During a study conducted on the helminth fauna of fishes in the middle Munim River basin, State of Maranhão, northeastern Brazil, three species (two new) of Diaphorocleidus Jogunoori, Kritsky & Venkatanarasaiah, 2004 are reported from the gills of the “piaba” Bryconops cf. affinis (Iguanodectidae): Diaphorocleidus affinis (Mizelle, Kritsky & Crane, 1968), D. forcipiformis n. sp. and D. munimensis n. sp. New morphological data, drawings, and geographic distribution were provided for D. affinis. Diaphorocleidus forcipiformis n. sp. is characterized by a male copulatory organ with 2½ rings counterclockwise and base forming a small tube with two circular flanges and accessory piece bifurcated, claw-shaped, with parts similar in shape and size, one of them distally bifid. Diaphorocleidus munimensis n. sp. is differentiated by the accessory piece, which is composed of two large pieces, united in their proximal part, claw-shaped, and distally hooked. The findings of this initial survey on the helminth parasites of fishes in this area emphasize the importance of carrying out comparable surveys on other fish species. Such surveys may lead to the identification of unknown species or new occurrences.

 

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