Sciadicleithrum spp. (Dactylogyridae, Monopisthocotyla) parasitizing Saxatilia brasiliensis (Cichlidae, Cichliformes) from the Munim River Basin, northeastern Brazil, with a description of a new species

By

Silva, Marciara L.
Ottoni, Felipe
Viana, Diego Carvalho
Saraiva, Dennisiane J.
Justo, Márcia Cristina Nascimento
Cohen, Simone Chinicz

Type

Article

Date of Publication

2025-11-13

Original Publication

Zoosystematics and evolution

Volume

101

Series / Issue

Issue: 4

Pages

2161--2169

Subjects

Cichlinae , Crenicichlina , hosts , Maranhão , Saxatilia brasiliensis

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft

Identifiers

DOI: https://doi.org/10.3897/zse.101.147382

 

Abstract

<br> During a study conducted on the helminth fauna of fishes in the middle Munim River Basin, Maranhão State, northeastern Brazil, a new species of<br> Sciadicleithrum<br> ,<br> S. anapurusensis<br> sp. nov.<br> , is reported from the gills of<br> Saxatilia brasiliensis<br> (Bloch, 1792), a cichlid endemic to the Northeast region of Brazil. In addition, a known species,<br> Sciadicleithrum araguariensis<br> Paschoal, Scholz, Tavares-Dias &amp; Luque, 2016, was recovered from the same host and is redescribed here, providing new morphological and biogeographical data.<br> Sciadicleithrum anapurusensis<br> sp. nov.<br> differs from all congeneric species in the general morphology of sclerotized structures (anchors, bars, vagina, accessory piece, and the number of MCO rings), being mainly characterized by the bifurcated accessory piece with unequal branches at the distal portion, with a subterminal thin projection and a hook-shaped terminal end. The findings of this study emphasize the importance of carrying out comparable surveys on different host species in order to increase the knowledge on monopisthocotylan parasites of fishes in this area. Furthermore, the finding of two congeneric species in the same host species reinforces the host specificity of<br> Sciadicleithrum<br> species to cichlid hosts.<br>