Revalidation of Enteromius alberti and presence of Enteromius cf. mimus (Cypriniformes: Cyprinidae) in the Lake Edward system, East Africa Author Maetens, Heleen 6DBEE3D3-FAC8-438D-B937-54728E17CD1F Section Vertebrates, Biology Department, Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium. Laboratory of Biodiversity and Evolutionary Genomics, Department of Biology, University of Leuven, Ch. Deberiotstraat 32, 3000 Leuven, Belgium. Operational Directorate Taxonomy and Phylogeny, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1000 Brussels, Belgium. Masaryk University, Department of Botany and Zoology, Kotlářská 2, 611 37 Brno, Czech Republic. heleen.maetens@africamuseum.be Author Steenberge, Maarten Van 57C714E0-F233-4B3E-960E-17A7863FBF6F Section Vertebrates, Biology Department, Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium. Laboratory of Biodiversity and Evolutionary Genomics, Department of Biology, University of Leuven, Ch. Deberiotstraat 32, 3000 Leuven, Belgium. Operational Directorate Taxonomy and Phylogeny, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1000 Brussels, Belgium. Masaryk University, Department of Botany and Zoology, Kotlářská 2, 611 37 Brno, Czech Republic. maarten.vansteenberge@naturalsciences.be Author Snoeks, Jos 13A8AB26-FF46-437C-9806-D49E11C5E15D Section Vertebrates, Biology Department, Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium. Laboratory of Biodiversity and Evolutionary Genomics, Department of Biology, University of Leuven, Ch. Deberiotstraat 32, 3000 Leuven, Belgium. Operational Directorate Taxonomy and Phylogeny, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1000 Brussels, Belgium. Masaryk University, Department of Botany and Zoology, Kotlářská 2, 611 37 Brno, Czech Republic. jos.snoeks@africamuseum.be Author Decru, Eva 1AEB7EED-C939-4702-8590-B3FCA7076324 Section Vertebrates, Biology Department, Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium. Laboratory of Biodiversity and Evolutionary Genomics, Department of Biology, University of Leuven, Ch. Deberiotstraat 32, 3000 Leuven, Belgium. Operational Directorate Taxonomy and Phylogeny, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1000 Brussels, Belgium. Masaryk University, Department of Botany and Zoology, Kotlářská 2, 611 37 Brno, Czech Republic. eva.decru.icht@gmail.com text European Journal of Taxonomy 2020 2020-08-11 700 1 28 journal article 21333 10.5852/ejt.2020.700 5fcc010d-8df1-418f-87b1-b29e649ed604 3981069 17D38562-BF4F-448F-9969-8524CEACC4B2 Genus Enteromius Cope, 1867 The results confirmed the occurrence of two syntopic species of Enteromius with a smooth dorsal fin ray in the Lake Edward system. Specimens of group A were conspecific with the types of E. alberti , except for one type specimen, which was assigned to group B, and with the holotype and paratypes of E. cercops . Enteromius alberti used to be considered a synonym of E. stigmatopygus . Based on our results, and following the principle of priority for species names, we propose to revalidate E. alberti with E. cercops as its junior synonym. A redescription of E. alberti is provided based on the lectotype (here designated) ( Fig. 7a ) and one paralectotype of E. alberti , the type series of E. cercops , here synonymised with E. alberti , and the additional specimens from the Lake Edward system examined in this study and identified as E. alberti (n = 37). The other paralectotype of E. alberti , which was revealed not to be conspecific with E. alberti , was not included in the redescription. The measurements and meristics can be found in Table 2 . An illustration of a fresh specimen of E. alberti , captured during the HIPE expeditions is provided in Fig. 7b . The specimens of group B were most similar to E. mimus , though the PCA on log-transformed measurements ( Fig. 6 ) suggested some differences. Therefore, we decided to assign the specimens of group B to E. cf. mimus with “cf” indicating specimens that are comparable to E. mimus but whose identification is uncertain ( Decru et al. 2016 ). Because of the unsuitable original description of E. mimus for modern taxonomic purposes, we decided to make a redescription based on the lectotype (here designed) ( Fig. 8 ) and eight of the nine paralectotypes of E. mimus . We found one paralectotype to have a serrated dorsal fin ray; therefore, it was considered not to be conspecific with the other types and excluded from the redescription. Specimens from the Lake Edward system identified as E. cf. mimus , the specimens from Tshambi and the aberrant lectotype of E. alberti were not included in the redescription, but their measurements and meristics are given in Table 2. A picture of a fresh specimen of E. cf. mimus is given in Fig. 9 . For both redescribed species, a lectotype was chosen from the syntypes . For E. alberti , this is the specimen illustrated in the original description by Poll (1939), which is also the largest specimen. The lectotype of E. mimus is the specimen that resembles most the original figure of E. mimus in the Catalogue of the Fresh-water Fishes of Africa in the British Museum (Natural History) , Volume IV, by Boulenger (1916) . The sampling sites of the two species in the Lake Edward system and the type localities of E. mimus , E. alberti and E. cercops are illustrated in Fig. 10 . The specimens from Tshambi, initially identified as E. alberti , are indicated as E. cf. mimus on the map, as found in the present study.