A new species of Ergasilus (Copepoda: Ergasilidae) from Geophagus altifrons and G. argyrostictus (Perciformes: Cichlidae) in the Brazilian Amazon

Naraiana Lopes Taborda; Fabiano Paschoal; José Luis Luque

doi:10.1515/ap-2016-0073

Article

A new species of Ergasilus (Copepoda: Ergasilidae) from Geophagus altifrons and G. argyrostictus (Perciformes: Cichlidae) in the Brazilian Amazon

Naraiana Lopes Taborda , Fabiano Paschoal and José Luis Luque

Published/Copyright: July 21, 2016

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From the journal Acta Parasitologica Volume 61 Issue 3

Abstract

A new species of ergasilid copepod, Ergasilus xinguensis n. sp., is described from females found on the gills of two cichlid fishes, Geophagus argyrostictus (Kullander, 1991) (type host) and G. altifrons (Heckel, 1840), from the Brazilian Amazon. The new species can be distinguished from congeners by the unique combination of the following characteristics: the cephalothorax is not inflated and is slightly constricted, the first antennulary segment bears 3 setae, maxillule with 3 unequal outer setae without minute process medially, maxilla has a large syncoxa with one seta near its basis, first and fourth legs are with a 3-segmented endopod, base of the exopod in leg 2 with a conspicuous bluntly-pointed projection and caudal ramus with two rows of curved conical spinules on ventral surface. The new species is the second member of Ergasilus von Nordmann, 1832 found on cichlids of the genus Geophagus (Heckel).

Keywords: Copepoda; Ergasilidae; Ergasilus; Cichlidae; Geophagus; Xingu River; Brazil

Acknowledgements

We wish to thank Aldenice Pereira, Philippe Alves and Tomáš Scholz for help with parasitological examination of fish and Emil José Hernández Ruz, Universidade Federal do Pará in Altamira, for providing facilities during the field trip. We thank Tomáš Scholz for helpful suggestions to an early draft of the manuscript. José L. Luque was supported by a research fellowship from the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico do Brazil (CNPq); Fabiano Paschoal was supported by a student fellowship from CAPES (Coordenação de Aperfeiçoamento de Pessoal do Ensino Superior, Brazil) and Naraiana L. Taborda by a student fellowship from CNPq.

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Received: 2015-12-1

Revised: 2015-2-19

Accepted: 2016-3-11

Published Online: 2016-7-21

Published in Print: 2016-9-1

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https://doi.org/10.1515/ap-2016-0073

Keywords for this article

Copepoda; Ergasilidae; Ergasilus; Cichlidae; Geophagus; Xingu River; Brazil