Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 98. (Budapest 2006)
Gattolliat, J.-L. ; Sartori, M.: The mayflies of Ghana (Insecta: Ephemeroptera)
POLYMITARCYIDAE Povilla adusta N AVAS, 1912 Materia! examined - GHANA: Northern Region, Banda-Nkwanta, Volta, 2°09'W, 8°22'N, 122 m, 1 (j, 5 ÇÇ, 14.10.1965 (G090); same locality, 1 cS, 27.09.1965 (G083); 2 SS, 21.09.1965 (G081); 1 o, 13.09.1965 (G073). All collected by S. ENDRŐDY-YOUNGA. Lake Volta, Kete Krachi, 0°05'W,7 o 50'N, 100 m, 119 Sâ, 4 99, 03.01.1969 (G991); same locality, 3 SS, 3 99,09.01.1969 (G992); Eastern Region, Adawso, Volta, 0°27'W, 5°52'N, 31 cTc?, 5 99, 28.02.1969 (G995); Western Region, Mpoho, Pra, 1°47'W,5 0 25'N, 6 0*0*, 05.01.1969 (G996); same locality, 1 9,06.01.1969 (G994). All collected by B. ENTZ. Diagnostic features - This burrowing mayfly is the only species of the genus found in Africa, the others inhabiting the Oriental realm (HUBBARD 1984). Povilla adusta is easy to recognize because of its large size. It is the most abundant species collected during this survey, as it is strongly attracted by light traps. Distribution - Povilla adusta is widespread in equatorial Africa, being found from Sudan to South Africa as well as from West Africa to Tanzania (ULMER 1916, DEMOULIN 1970, HUBBARD 1984). In the Museum of Zoology (Lausanne) collections, we have numerous specimens collected in Mali, Guinea, Ivory Coast and Sierra Leone, coll. and leg. J.-M. ELOUARD (ORSTOM). Its presence in Ghana was recorded for the first time by PETR (1970, 1973) who studied this species in the newly built Lake Volta. Povilla adusta nymphs live in lakes and large rivers where they burrow in the sediment but also in wood, being one of the rare mayflies interfering with human beings by damaging boats and pilings below the waterline (KlMMINS 1949). The species is also well known for its synchronous and peculiar mass emergences [see for instance HARTLAND-ROWE (1984)] and is locally so numerous that they can serve as food for the people (BERGERON et al. 1988). Exeuthyplocia minima (ULMER, 1916) Euthyplocia minima ULMER, 1916 (orig.) Exeuthyplocia minima: LESTAGE (1918) (comb.) Material examined - GHANA: Brong-Abafo Region, Volta basin, Black Volta river at Bui camp, 2°15'W, 8°17'N, 106 m, 2 99, 06.11.1965 (G98); same locality, 4 99, 16.11.1965 (Gl 00). All collected by S. ENDRŐDY-YOUNGA. Diagnostic features - The genus Exeuthyplocia LESTAGE, 1918 is represented by the single species E. minima. Its status has been reviewed by HIDEUX (1987). Distribution - Exeuthyplocia minima is mainly found in West Africa, where populations have been recorded in Guinea, Ivory Coast, Mali, Gambia, Togo and Ghana (HIDEUX, 1987). Its range extends eastwards to Uganda and southwards to Congo (GILLIES 1980a, KlMMINS 1960, DEMOULIN 1952).
