Six new dactylogyrid species (Platyhelminthes, Monogenea) from the gills of cichlids (Teleostei, Cichliformes) from the Lower Congo Basin Author Jorissen, Michiel W. P. Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, & Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium Author Pariselle, Antoine ISEM, Univ de Montpellier, CNRS, IRD, Montpellier, France Author Huyse, Tine 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 Author Vreven, Emmanuel J. 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 Author Snoeks, Jos 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 Author Decru, Eva 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 Author Kusters, Thomas Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, Author Lunkayilakio, Soleil Wamuini Institut Supérieur Pédagogique, Mbanza-Ngungu, B. P. 127, Democratic Republic of the Congo Author Bukinga, Fidel Muterezi Centre de Recherche en Hydrobiologie, Uvira, B. P. 73, Democratic Republic of the Congo Author Artois, Tom Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, Author Vanhove, Maarten P. M. Research Group Zoology: Biodiversity, & Toxicology, Centre for Environmental Sciences, Hasselt University, & 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 text Parasite 2018 Paris, France 2018-12-07 25 64 1 21 http://dx.doi.org/10.1051/parasite/2018059 journal article 10.1051/parasite/2018059 1776-1042 PMC6284406 30526819 12628634 EEFEB392-86FC-40ED-B8C3-01936A04C892 Parasites of Hemichromis The collected representatives of Hemichromis are the native H. elongatus and H. stellifer [10]. On these hosts, we have discovered three new species that are morphologically similar to already described ones: O. ximenae n. sp. , which resembles O. voltensis ; C. calycinus n. sp. , which resembles C. teugelsi and C. polyenso n. sp. , which resembles C. euzeti [35]. Furthermore, we can assume from the literature that C. euzeti is sympatric (occurs on the same individual host) with C. longicirrus in Benin , Cameroon and ROC , though not explicitly stated [6, 22, 34], while in Lower Congo, C. longicirrus is sympatric with C. polyenso n. sp. Similarly, O. voltensis and O. aframae are presumably sympatric in Benin , Cameroon , Senegal , Gambia , Mali and Ivory Coast [6, 26, 34], while in Lower Congo O. aframae is sympatric with O. ximenae n. sp. As shown, there are similarities between the parasite faunas of Hemichromis spp. throughout different ecoregions. However, parasites of Hemichromis spp. remain unexplored for large portions of Africa; thus, it is too early to draw conclusions about their biogeography and diversity. Nonetheless, it can be hypothesized that compared with the species discovered in Lower Congo, more morphologically similar species exist in other freshwater ecoregions on other representatives of Hemichromis . Cichlidogyrus kmentovae n. sp. was only found on H. stellifer , but our sample size is too small to verify whether it does not infect H. elongatus as well. Cichlidogyrus falcifer occurs on H. fasciatus [35] as well as on H. elongatus and thus is an intermediate specialist (a parasite occurring on more than one host from the same genus, see [21]).