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

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

Distribution - T. longus is known from Congo and Sudan. This is the first report of this species from West Africa and is new for Ghana. Tricorythus sp. Material examined - GHANA: Northern Region, Banda-Nkwanta, Volta, 2°09'W, 8°22'N, 122 m, 6 $$, 07.10.1965 (G089); same locality, 56 ?$, 01.09.1965 (G070); 8 99, 27.09.1965 (G083); 28 99, 01.10.1965 (G088); Brong-Abafo Region, Bui camp, Volta, Black Volta, 2°15'W, 8°17'N, 106 m, 10 9$, 27.10.1965 (G087); same locality, 6 99, 01.11.1965 (G097); Ashanti Region, Kumasi, Volta, 1°36'W, 6°43'N, 293 m, 21 ?$, 06.07.1967 (G232); same locality, 72 99, 02.07.1967 (G230); 1$, 24.06.1965 (G016); 2 99, 25.07.1967 (G220); Kwadaso/Kumasi, Volta, 1°39'W, 6°42'N, 259 m, 16 9$, 30.06.1969 (G379); same locality, 7 99, 28.07.1969 (G383). All collected by S. ENDRŐDY-YOUNGA. Diagnostic features - Material constituted by female imagoes and subimagoes. At the moment, no reliable identification can be provided. CAENIDAE Caenis elouardi MALZACHER, 1990 Material examined - GHANA: Northern Region, Banda-Nkwanta, Volta, 2°09'W, 8°22'N, 122 m, 2 99, 14.10.1965 (G090); same locality, 2 99, 07.10.1965 (G089); 7 99, 27.09.1965 (G083); 8 99, 01.10.1965 (G088); 2 99, 21.09.1965 (G081); 6 99, 13.09.1965 (G073); Brong-Abafo Region, Bui camp, Volta, Black Volta, 2°15'W, 8°17'N, 106 m, 3 o*d\ 06.11.1965 (G098); same locality, 85 S3, 1 9, 27.10.1965 (G087); 5 S<S, 1 9, 01.11.1965 (G097); 5 cjcj, 16.11.1965 (G100); Ashanti Region, Kumasi, Volta, 1°36'W, 6°43'N, 293 m, 1 9, 25.06.1969 (G377). All collected by S. ENDRŐDY-YOUNGA. Diagnostic features - The specimens listed above shares with C. elouardi some unique features such as rounded tip in the male forceps and forecoxae more widely separated than in other species. Compared to the original description by MALZACHER (1990), our specimens slightly differ by the shape of the penis lobes and the forceps, but according to MALZACHER (pers. comm.), these small differences must be regarded as intraspecific variations. C. elouardi belongs to a group of Caenis species mainly diversified in South America (MALZACHER 1990,2001). Distribution - Caenis elouardi was described from Guinea and has never been mentioned since that time. In the ORSTOM collection deposited in our museum, we found several other populations from Guinea and Ivory Coast (MALZACHER & SARTORI, in prep.)