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Acusicola rochai n. sp. (Copepoda: Ergasilidae) parasitizing Anableps anableps (Anablepidae) from the Amazon Coast, with a key for Acusicola spp.

Published online by Cambridge University Press:  01 August 2024

João Victor Couto ,
Jorge Luiz Silva Nunes ,
Fabiano Paschoal  and
Felipe Bisaggio Pereira Open the ORCID record for Felipe Bisaggio Pereira [Opens in a new window]
João Victor Couto
Affiliation:
Programa de Pós-Graduação em Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
Jorge Luiz Silva Nunes
Affiliation:
Laboratório de Organismos Aquáticos, Departamento de Oceanografia e Limnologia, Universidade Federal do Maranhão, São Luís, MA, Brazil
Fabiano Paschoal
Affiliation:
Programa de Pós-Graduação em Biodiversidade e Conservação, Universidade Federal do Maranhão, São Luís, MA, Brazil
Felipe Bisaggio Pereira*
Affiliation:
Departamento de Parasitologia, Instituto de Ciências Biológicas, Bloco L4 sala 252, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
*
Corresponding author: Felipe Bisaggio Pereira; Email: felipebisaggiop@hotmail.com
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Abstract

Ergasilid copepods represent one of the commonest groups of fish parasites in Brazil. Within Ergasilidae, three genera share a peculiar latching mechanism on the antenna that completely encircles the gill filament, one of which is Acusicola Cressey, 1970. During a survey of estuarine fish from the Brazilian Amazon Coast, a new species of Acusicola was found on the gills of the largescale foureyes Anableps anableps (Linnaeus, 1758) (Actinopterygii: Anablepidae) in São Marcos Bay, State of Maranhão. Acusicola rochai n. sp. can be distinguished from its closest congeners mainly by three protrusions on the dorsal surface of third and fourth pedigerous somites, and by smooth interpodal plates. This work is the first report of a parasitic copepod infesting a fish from Anablepidae and, consequently, the host An. anableps. The existing dichotomous key proposed for the genus Acusicola includes only ten species, excluding the eight species subsequently described. Therefore, in the present work, a new dichotomous key is provided based on reliable and well-documented features.

Keywords

Brazilian Amazon CoastCyclopoidaCyprinodontiformesEctoparasitesLittoral of Maranhão
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 104 , 2024 , e64
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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