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Haplochromis --- Freshwater fishes --- Ecology
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A revision was done on the genus Enteromius from the Lake Edward system by a genetic (COI, mtDNA) and morphometric (26 measurements, 13 meristics) approach. The system includes lakes Edward and George, connected by the Kazinga Channel. Enteromius mainly occurs in the rivers. Five species were recognised to occur: E. perince, E. stigmatopygus, E. apleurogramma, E. kerstenii and E. pellegrini. Enteromius perince had the most similarities with E. mimus but differed in the snout length. Therefore, these specimens were assigned to E. cf. mimus, with “cf.” indicating the uncertain delineation of E. mimus. Enteromius stigmatopygus was conspecific with E. alberti, a synonym of E. stigmatopygus. Enteromius alberti is revalidated. Enteromius perince and E. stigmatopygus were not found to occur in the system. Consequently, these specimens were misidentified. In each of the three other species, two genetic clades were found. The clades could be separated on PCAs, although no characteristics were found to distinguish them, except for the clades of E. kerstenii. Two hypotheses were formulated: (i) the two clades of each species belong to the same species, (ii) the two clades form two separated species. Enteromius pellegrini is morphological similar to E. neumayeri. Therefore, these two species were examined. Enteromius portali, synonym of E. neumayeri and described for the system, was morphological different from the specimens of E. pellegrini from the system. Therefore, it was recognised as a sixth species within the system, next to E. cf. pellegrini, E. cf. kerstenii, E. cf. apleurogramma, E. cf. mimus and E. alberti.
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