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

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

About 20 genera of Baetidae are presently known to occur in the Afrotropical area; 19 of them are known from West Africa (BARBER-JAMES & LUGO-ORTIZ 2003). Baetidae Genus 1 possesses single intercalary veins; therefore it does not belong to subfamily Baetinae (sensu GILLIES 1991). The single costal spur of the hindwings also excludes Genus 1 from Afroptilum GILLIES, 1990, Centroptiloides LESTAGE, 1918, Dicentwptilum WUILLOT et GILLIES, 1994 and Mickiops MCCAFFERTY, LUGO-ORTIZ et BARBER-JAMES, 1997. The shape of the gonopods also indicates that Genus 1 differs from Dabulamanzia LUGO-ORTIZ et MCCAFFERTY, 1996 and genera with highly transformed gonopods [Bugilliesia complex sensu LUGO-ORTIZ & MCCAFFERTY (1996)]. The shape of hindwing, in peculiar the costal spur (Fig. 3), differs from Cheleocloeon WUILLOT èt GILLIES, 1993 and Peuhlella, but presents high similarity with Crassabwa LUGO-ORTIZ et MCCAFFERTY, 1996 (fig. 20f in CRASS 1947). The gonopods of Genus 1 also seem similar to those of Crassabwa (fig. 20e in CRASS 1947). The basal segment of the type species C. flava (CRASS, 1947) apparently does not have any process, but this structure is present in other species of the genus (fig. 21b in KOPELKE 1980). The forewing appears different between the two genera: Crassabwa possesses relatively long single intercalary veins in the radial area, but reduced ones in the cubital fields (fig. 20d in CRASS 1947). The genus Crassabwa has never been reported from West Africa and no specimens from this area have been found in our collections. According to the present state of knowledge, Genus 1 should be either a new genus, the imaginai stage of a genus previously known only in the larval stage, or an atypical new species of Crassabwa. Baetidae (unidentified) Material examined - GHANA: Northern Region, Banda-Nkwanta, Volta, 2°09'W, 8°22'N, 122 m, 2$$, 13.09.1965 (G073); same locality, 1 $,01.10.1965 (G088); 1 $, 07.10.1965 (G089); Brong-Abafo Region, Bui camp, Volta, Black Volta, 2°15'W,8°17'N, 106 m, 1 S, 1 $,27.10.1965 (G087); same locality, 1 $, 16.11.1965 (G100); Central Region, Tafo, Volta, 0°22'W, 6°14'N, 198 m, 5 $ $, 10.05.1969 (G350). All collected by S. ENDRŐDY-YOUNGA. Western Region, Mpoho, Pra, 1°47' W, 5°25' N, 3 $$, 05.01.1969 (G996), ENTZ, B. Diagnostic features - The poor condition of the material makes any attempt of identification even at a generic level fruitless.