Two new species of Cichlidogyrus (Monogenea: Dactylogyridae) parasitizing the gills of African cichlid fishes (Perciformes) from Senegal: morphometric and molecular characterization
| Authors | |
|---|---|
| Year of publication | 2013 |
| Type | Article in Periodical |
| Magazine / Source | Parasitology Research |
| MU Faculty or unit | |
| Citation | |
| Web | Full Text |
| Doi | http://dx.doi.org/10.1007/s00436-013-3291-9 |
| Field | Zoology |
| Keywords | Hemichromis letourneuxi; Sarotherodon galilaeus; Tilapia guineensis; Monogenea; Cichlidogyrus dracolemma; Cichlidogyrus nageus; phylogeny; taxonomy; Senegal |
| Description | Two new species of Cichlidogyrus are described from the gills of three species of African cichlids collected from the Gambia River basin in the Niokolo-Koba National Park, Senegal: Cichlidogyrus dracolemma n. sp. from Hemichromis letourneuxi and C. nageus n. sp. from Sarotherodon galilaeus and Tilapia guineensis. The new species are recognized on the basis of morphological differences in the male copulatory organs (MCOs) and apparent differences in the SSU rDNA and ITS1 sequence data. Cichlidogyrus dracolemma n. sp. resembles specimens of Cichlidogyrus from Hemichromis bimaculatus, probably misidentified as C. bychowskii by Paperna in 1965, in having morphologically similar types of haptoral sclerites and MCO. The new species is characterized by possessing an MCO with a kite-shaped termination of the accessory piece and a vagina distally surrounded by a circular superficial sclerotization of the body surface.. Molecular phylogenetic analyses showed a strongly supported clade including C. dracolemma n. sp. and two species collected from Hemichromis fasciatus, namely Cichlidogyrus longicirrus Paperna, 1965 and Cichlidogyrus falcifer Dossou and Birgi, 1984. Based on both morphology and molecular phylogeny, Cichlidogyrus nageus n. sp. appears to be closely related to Cichlidogyrus acerbus Dossou, 1982 obtained from S. galilaeus. Morphologically, C. nageus n. sp. is readily separated from all known congeners by the characteristic pestle shaped termination of the accessory piece of the MCO. Molecular phylogenetic reconstruction showed that C. dracolemma n. sp. and C. nageus n. sp. cluster with the Cichlidogyrus species possessing the same haptoral configuration and host preferences (on subfamily and tribe level, respectively). |
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