Folia Parasitologica, vol. 59 (2012), issue 1

Folia Parasitologica 59[1] 59-63 (2012) | 10.14411/fp.2012.009

Two new species of Protogyrodactylus (Monogenoidea: Dactylogyridae) from the gills of Gerres nigri (Teleostei: Gerreidae) from Senegal

Walter A. Boeger1, Arfang Diamanka2, Antoine Pariselle3, Luciana Patella1
1 Molecular Ecology, Evolutionary Parasitology Laboratory, Departamento de Zoologia and Grupo Integrado de Aquicultura e Estudos Ambientais, Caixa Postal 19073, Universidade Federal do ParanŠ, Brazil
2 Laboratory of Parasitology and Laboratory of Aquatic Animals Pathologies - Khaled Bin Sultan Living Oceans Foundation, Department of Animal Biology, Faculty of Sciences and Technologies, University Cheikh Anta Diop, Dakar, Senegal
3 UR 203 / UMR 5554, IRD/ISE-M, Universitť Montpellier II - CC 063, 34095 Montpellier Cedex 5, France

Protogyrodactylus ethiopicus sp. n. and P. kritskyi sp. n. are described from the gills of Gerres nigri GŁnther (Gerreidae, Perciformes) captured from the estuary of the Sine-Saloum River (Senegal, West Africa). These new species differ from previously described species within the genus by a mid- or dextro-ventral vaginal opening (dextral in all other species). They are part of a morphological species group within Protogyrodactylus Johnston et Tiegs, 1922 that has the tip of the superficial root of the ventral anchor resembling a hook and two anterior projections on the anterior margin of the ventral bar. Protogyrodactylus ethiopicus differs from the remaining species in this group mainly by the morphology of the base of the male copulatory organ (MCO), which is disk-shaped, and the shape of the anterior projections of the ventral bar (round in the new species and relatively elongate in the other species of the group). The other new species, P. kritskyi, differs from all others in the same morphological group in having a MCO with a greatly expanded base that bears a heel-like subterminal sclerotization.

Keywords: Protogyrodactylus, Gerres nigri, Senegal, Protogyrodactylus ethiopicus, Protogyrodactylus kritskyi

Received: September 16, 2011; Accepted: November 22, 2011; Published: February 23, 2012


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