Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

Pariselle, Antoine; Nyom, Arnold R. Bitja; Bilong, Charles Félix Bilong

doi:10.11646/zootaxa.3881.3.4

Cited by 14 publications

(37 citation statements)

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“…rognoni Pariselle, Bilong Bilong & Euzet, 2003 [ 45 ]; C . schreyenbrichardorum Pariselle & Vanhove, 2015 [ 15 ]; C. sanjeani Pariselle & Euzet, 1997 [ 40 ]; C. sigmocirrus Pariselle, Bitja Nyom & Bilong Bilong, 2014 [ 46 ]; C . steenbergei Gillardin, Vanhove, Pariselle, Huyse & Volckaert, 2012 [ 42 ]; C .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the dorsal bar auricles in C. aspiralis n. sp. have small hollow outgrowths on the anterior face, a feature observed in congeners infecting representatives of Tylochromis Regan, 1920, such as the Tanganyikan C. mulimbwai and C. muzumanii , both parasites of T. polylepis [ 41 ] (see above), and the non-Tanganyikan C. chrysopiformis , C. djietoi and C. sigmocirrus Pariselle, Bitja Nyom & Bilong Bilong, 2014 from T. sudanensis Daget, 1945 [ 46 ], C. kothiasi Pariselle & Euzet, 1994 from T. jentinki (Steindachner, 1862) [ 51 ], and also C. dageti , C . euzeti and C. falcifer found on Hemichromis fasciatus Peters, 1857 [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

“…amphoratus Pariselle & Euzet, 1996 [ 56 ]; C. berrebii Pariselle & Euzet, 1994 [ 51 ]; C. cirratus Paperna, 1964 [ 59 ]; C . cubitus Dossou, 1982 [ 49 ]; C. djietoi [ 46 ]; C . giostrai Pariselle, Bilong Bilong & Euzet, 2003 [ 45 ]; C. karibae Douëllou, 1993 [ 55 ]; C .…”

Section: Resultsmentioning

confidence: 99%

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Underexplored diversity of gill monogeneans in cichlids from Lake Tanganyika: eight new species of Cichlidogyrus Paperna, 1960 (Monogenea: Dactylogyridae) from the northern basin of the lake, with remarks on the vagina and the heel of the male copulatory organ

2017

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BackgroundLake Tanganyika harbours the most diverse cichlid assemblage of the Great African Lakes. Considering its cichlid flocks consist of approximately 250 endemic species, we can hypothesize a high species-richness in their often quite host-specific monogenean ectoparasites belonging to Cichlidogyrus Paperna, 1960. Yet, only 24 species were described from Tanganyikan hosts and some host tribes have never been investigated for monogeneans. This study presents the first parasitological examination of species of the tribes Cyprichromini (Cyprichromis microlepidotus (Poll, 1956)), Eretmodini (Eretmodus marksmithi Burgess, 2012 and Tanganicodus irsacae Poll, 1950) and Ectodini (Aulonocranus dewindti (Boulenger, 1899)). Specimens of the ectodine Ophthalmotilapia nasuta (Poll & Matthes, 1962) from which four Cichlidogyrus spp. have been previously described from more southern localities were also studied. Further, we discuss the haptor configuration in Tanganyikan Cichlidogyrus spp. and highlight the morphological diversity of the vagina, and that of the heel, a sclerotized part of the male copulatory organ, absent in some species of Cichlidogyrus.Methods Cichlidogyrus spp. were isolated from gills and fixed using GAP. Haptoral and genital hard parts were measured and drawn by means of a phase contrast microscopic examination.ResultsWe describe eight new species: Cichlidogyrus milangelnari n. sp. on C. microlepidotus; C. jeanloujustinei n. sp. on E. marksmithi; C. evikae n. sp. on T. irsacae; C. aspiralis n. sp., C. glacicremoratus n. sp. and C. rectangulus n. sp. on O. nasuta; and C. pseudoaspiralis n. sp. and C. discophonum n. sp. on A. dewindti. Three haptoral morphotypes were recognized among the new species. Species of Cichlidogyrus from closely related hosts exhibited the same morphotypes. Geographical variation in Cichlidogyrus spp. fauna as observed in O. nasuta and three morphotypes were distinguished. Finally, we listed 111 Cichlidogyrus species, of which 27 and three Tanganyikan species lack sclerotized vagina and heel, respectively, just like 19 and seven species outside of the lake.ConclusionsHaptoral and genital features in the Tanganyikan Cichlidogyrus fauna reflect the phylogenetic relationships of their cichlid hosts. It seems that several lineages of Cichlidogyrus spp. exist in Lake Tanganyika but further studies are necessary to confirm this hypothesis and answer questions related to Lake Tanganyika and its cichlids.Electronic supplementary materialThe online version of this article (10.1186/s13071-017-2460-6) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Underexplored diversity of gill monogeneans in cichlids from Lake Tanganyika: eight new species of Cichlidogyrus Paperna, 1960 (Monogenea: Dactylogyridae) from the northern basin of the lake, with remarks on the vagina and the heel of the male copulatory organ

2017

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“…Species of this gill parasite are highly host specific, often only infecting a single host species (Pariselle & Euzet, ). To date, 95 species have been described (Pariselle & Euzet, ; Vanhove, Volckaert & Pariselle, ; Gillardin et al ., ; Muterezi Bukinga et al ., ; Pariselle, Bitja Nyom & Bilong Bilong, , ; Řehulková, Mendlová & Šimková, ; Pariselle et al ., , in press). Cichlidogyrus species occur at high prevalence and exhibit high infection intensities (Paperna, ).…”

Section: Introductionmentioning

confidence: 98%

A link between host dispersal and parasite diversity in two sympatric cichlids of Lake Tanganyika

et al. 2014

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A major goal in ecology is to unravel how species assemblages emerge and how they are structured across the landscape. Host-parasite systems are particularly interesting in this context, as limited host dispersal may promote the differentiation of parasite communities. We examined whether the patterns of species diversity in Cichlidogyrus, a genus of monogenean parasitic flatworms with a direct life cycle, are consistent with the hypothesis that parasite diversity is driven by host dispersal. This was carried out by comparing two sympatric cichlid hosts (Tropheus moorii and Simochromis diagramma) with contrasting dispersal abilities. Genetic connectivity among host populations along the Zambian shoreline of Lake Tanganyika was estimated using microsatellite genotyping. Cichlidogyrus parasites were isolated and identified morphologically to the species level.Simochromis diagramma, a host with a high dispersal capacity, was infected by a low number of Cichlidogyrus species, and the parasite assemblages were similar among host populations. In contrast, T.moorii, a host with a low dispersal capacity, was infected by a large number of Cichlidogyrus species, and the parasite assemblages differed strongly among host populations. These outcomes were thus as expected from the hypothesis. Because of the strong host specificity of these Cichlidogyrus species, a lack of connectivity among host populations might facilitate allopatric speciation of the parasite

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“…Currently, 13 monogenean genera are known to infect cichlid species and six of these have been observed on African representatives36. Cichlidogyrus (Monopisthocotylea, Dactylogyridae) is the most species rich, with 102 representatives recorded from 88 different host species10111213141518373839404142. This genus displays variation in host-specificity and contains generalist but also strictly specialist species3943.…”

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Reduced host-specificity in a parasite infecting non-littoral Lake Tanganyika cichlids evidenced by intraspecific morphological and genetic diversity

Kmentová

Gelnar

Mendlová

et al. 2016

Sci Rep

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Lake Tanganyika is well-known for its high species-richness and rapid radiation processes. Its assemblage of cichlid fishes recently gained momentum as a framework to study parasite ecology and evolution. It offers a rare chance to investigate the influence of a deepwater lifestyle in a freshwater fish-parasite system. Our study represents the first investigation of parasite intraspecific genetic structure related to host specificity in the lake. It focused on the monogenean flatworm Cichlidogyrus casuarinus infecting deepwater cichlids belonging to Bathybates and Hemibates. Morphological examination of C. casuarinus had previously suggested a broad host range, while the lake’s other Cichlidogyrus species are usually host specific. However, ongoing speciation or cryptic diversity could not be excluded. To distinguish between these hypotheses, we analysed intraspecific diversity of C. casuarinus. Monogeneans from nearly all representatives of the host genera were examined using morphometrics, geomorphometrics and genetics. We confirmed the low host-specificity of C. casuarinus based on morphology and nuclear DNA. Yet, intraspecific variation of sclerotized structures was observed. Nevertheless, the highly variable mitochondrial DNA indicated recent population expansion, but no ongoing parasite speciation, confirming, for the first time in freshwater, reduced parasite host specificity in the deepwater realm, probably an adaptation to low host availability.

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Four new species of Cichlidogyrus (Monogenea, Ancyrocephalidae) from Sarotherodon mvogoi and Tylochromis sudanensis (Teleostei, Cichlidae) in Cameroon

Cited by 14 publications

References 14 publications

Underexplored diversity of gill monogeneans in cichlids from Lake Tanganyika: eight new species of Cichlidogyrus Paperna, 1960 (Monogenea: Dactylogyridae) from the northern basin of the lake, with remarks on the vagina and the heel of the male copulatory organ

Underexplored diversity of gill monogeneans in cichlids from Lake Tanganyika: eight new species of Cichlidogyrus Paperna, 1960 (Monogenea: Dactylogyridae) from the northern basin of the lake, with remarks on the vagina and the heel of the male copulatory organ

A link between host dispersal and parasite diversity in two sympatric cichlids of Lake Tanganyika

Reduced host-specificity in a parasite infecting non-littoral Lake Tanganyika cichlids evidenced by intraspecific morphological and genetic diversity

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