Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 98. (Budapest 2006)

Gattolliat, J.-L. ; Sartori, M.: The mayflies of Ghana (Insecta: Ephemeroptera)

Further material - GUINEA: Niger basin; Niandan river at Bambaya; 2 ó*Ó*; 25.10.1984 (AO066), ELOUARD J.-M. (ORSTOM) coll. and leg. Diagnostic features - The generic placement of this and other related species has been controversial, as illustrated by the numerous generic placements over the years. Basically the synonymy of Notonurus CRASS, 1947 with Compsoneuriella ULMER, 1939 as proposed by GILLIES (1984) is well established. In a recent paper WANG & MCCAFFERTY (2004) rejected the synonymy between Compsoneuriella and Compsoneuria EATON, 1881 proposed by BRAASCH & SOLDÁN (1986) and put Compsoneuriella in synonymy with Thalerosphyrus EATON, 1881. We follow the last development in this controversial issue as proposed by WEBB et al. (2006) and consider Compsoneuria as a valid genus and a senior synonym for both Compsoneuriella and Notonurus. The genus Compsoneuria encompasses five species in continental Africa. The examined material perfectly fits the diagnosis of C. njalensis. The closest species is C. bequaerti, but the Ghana specimens differ in the shape of the genitalia and the colour patterns on the forewing [see DEMOULIN (1956) for comparison]. Distribution - Compsoneuria njalensis is recorded from Sierra Leone and Uganda (DEMOULIN 1970) up to South Africa (SCHOONBEE 1967). The Ghana material was compared to some males from Guinea and proved to be conspecific. The species is new for Ghana and Guinea. OLIGONEURIIDAE All of the oligoneuriid material presented here belongs to the genus Elassoneuria EATON, 1881. The systematics of the family is in great need of a revision, and specific attributes are only tentative. Oligoneuriidae adults are well known to exhibit marked intraspecific variation. At the moment, 6 species are recognized from continental Africa (GILLIES 1974). Elassoneuria cf. Candida EATON, 1913 (Figs 5-6) Material examined - GHANA: Brong-Abafo Region, Volta basin, Black Volta river at Bui camp, 2°15'W, 8°17'N, 106 m, 24 Sâ, 1 ?, 27.10.1965 (G087); same locality, 3 SS, 06.11.1965 (G098). All collected by S. ENDRŐDY-YOUNGA. Diagnostic features - According to GILLIES (1974) the studied specimens share the following characters with E. Candida: gonopods four-segmented and first segment with an inner spur (Figs 5-6). Our uncertainty comes from the fact that the