Condylostylus beckeri Speiser, 1920

Grichanov, Igor Ya., 2020, New species of Condylostylus Bigot (Diptera: Dolichopodidae) from Comoros Madagascar, Tanzania and South Africa, with key to Afrotropical species, Zootaxa 4830 (1), pp. 62-74 : 73

Condylostylus beckeri Speiser

Condylostylus beckeri Speiser, 1920: 218 . Type locality: Cameroon: Dschang.

Condylostylus congensis Curran, 1927: 263 , syn. nov. Type locality: Congo-Brazzaville, Mayumbe Lemba.

Condylostylus imitans Parent, 1935: 117 , nec Curran, 1925 (misidentification).

Material examined. Cameroon: 1♂, 3♀, Northwest Reg., Mezam, Bafut village at: 6°05.026ʹN, 10°07.442ʹE, 1060 m, Malaise trap, cultivated plot & degraded forest, 17–19.viii.2013, A.H. Kirk-Spriggs ( BMSA) . Ethiopia: 1♂, 1♀, Amhara, Blue Nile , 1070 m, 10.08°N, 38.19°E, 31.vii.2012, N. Vikhrev ( ZMUM) . Kenya: 2♂, Kikuyu env., Ondiri wetland, 1.253417°S, 36.6641°E, 2011 m, 15.xi.2012, D. Gavryusin ( ZMUM) .

Remarks. New material collected from the Mezam Department of Cameroon, which is very close (about 70 km) to the type locality of C. beckeri (Dschang city), stimulated the re-examination of the description of this species ( Speiser 1920). As it turned out, Speiser incorrectly described the fore leg of his species; i.e., he named the modified basitarsus as tibia, and the simple tarsomere 2 as the basitarsus. In all other respects, C. beckeri male is identical with the holotype of C. congensis (examined; see Grichanov 1998, 1999). Therefore, the latter species is placed in synonymy with the former species. No differences in the male genitalia of C. beckeri collected from Cameroon, Ethiopia and Kenya were found. Nevertheless, wing venation is distinctly different. Vein M 1 is straight, forming an almost straight line with M 2 in the material from Cameroon; M 1 is slightly curved, forming distinct angle with M 2 in the material from Ethiopia (like those veins in Fig. 3E ); and M 1 has proximal stump vein in middle, also forming distinct angle with M 2 in the material from Kenya. These characters may indicate cryptic species, but at this time they are considered as intraspecific variation, which is sometimes found in other species of Sciapodinae .

Distribution. Burundi, Cameroon, DR Congo, Republic of the Congo, Ethiopia, Gabon, Kenya, Rwanda, South Africa, Tanzania, Uganda.

Figures

FIGURE 3. Condylostylus gavryushini sp. nov., male. A. Habitus. B. Head. C. Antenna. D. Fore basitarsus, dorsal view. E. Wing. F. Hypopygium, left lateral view.