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Parasite. 2018;25:64. doi: 10.1051/parasite/2018059. Epub 2018 Dec 7.

Six new dactylogyrid species (Platyhelminthes, Monogenea) from the gills of cichlids (Teleostei, Cichliformes) from the Lower Congo Basin.

Author information

1
Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, Agoralaan gebouw D, 3590 Diepenbeek, Belgium - Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium.
2
ISEM, Univ de Montpellier, CNRS, IRD, Montpellier, France.
3
Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium - Laboratory of Biodiversity and Evolutionary Genomics, University of Leuven, Charles Deberiotstraat 42, 3000 Leuven, Belgium.
4
Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, Agoralaan gebouw D, 3590 Diepenbeek, Belgium.
5
Institut Supérieur Pédagogique, Mbanza-Ngungu, B.P. 127, Democratic Republic of the Congo.
6
Centre de Recherche en Hydrobiologie, Uvira, B.P. 73, Democratic Republic of the Congo.
7
Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, Agoralaan gebouw D, 3590 Diepenbeek, Belgium - Laboratory of Biodiversity and Evolutionary Genomics, University of Leuven, Charles Deberiotstraat 42, 3000 Leuven, Belgium - Department of Botany and Zoology, Faculty of Science, Masaryk University, Kamenice 735/5, 625 00 Brno, Czech Republic - Zoology Unit, Finnish Museum of Natural History, University of Helsinki, Pohjoinen Rautatiekatu 13, 00100 Helsinki, Finland.

Abstract

The Lower Congo Basin is characterized by a mangrove-lined estuary at its mouth and, further upstream, by many hydrogeographical barriers such as rapids and narrow gorges. Five localities in the mangroves and four from (upstream) left bank tributaries or pools were sampled. On the gills of Coptodon tholloni, Coptodon rendalli, Hemichromis elongatus, Hemichromis stellifer and Tylochromis praecox, 17 species of parasites (Dactylogyridae & Gyrodactylidae, Monogenea) were found, eight of which are new to science. Six of these are herein described: Cichlidogyrus bixlerzavalai n. sp. and Cichlidogyrus omari n. sp. from T. praecox, Cichlidogyrus calycinus n. sp. and Cichlidogyrus polyenso n. sp. from H. elongatus, Cichlidogyrus kmentovae n. sp. from H. stellifer and Onchobdella ximenae n. sp. from both species of Hemichromis. On Cichlidogyrus reversati a ridge on the accessory piece was discovered that connects to the basal bulb of the penis. We report a putative spillback effect of the native parasites Cichlidogyrus berradae, Cichlidogyrus cubitus and Cichlidogyrus flexicolpos from C. tholloni to the introduced C. rendalli. From our results, we note that the parasite fauna of Lower Congo has a higher affinity with the fauna of West African and nearby freshwater ecoregions than it has with fauna of other regions of the Congo Basin and Central Africa.

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