Campsicnemus sanctaehelenae, Grichanov, 2012

Grichanov, Igor Ya., 2012, Review of Campsicnemus species from the Atlantic Ocean Islands (Diptera: Dolichopodidae), European Journal of Taxonomy 11, pp. 1-12 : 4-6

Campsicnemus sanctaehelenae sp. nov.

Fig. 2

Material examined

Holotype

ST. HELENA: ♂, Centre, High Central Ridge, 2300-2600 ft, Feb. 1967 / Coll. Mus. Tervuren, Seconda Mission Zoologique à Sainte-Hélène, J. Decelle, N. et J. Leleup [ RMCA].

Paratypes

ST. HELENA: 1 ♂, Centre, High Central Ridge, Cabbage Tree Road, 2500 ft, Mar. 1967 / Coll. Mus. Tervuren, Seconda Mission Zoologique à Sainte-Hélène, J. Decelle, N. et J. Leleup; ST. HELENA: 1 ♂, Centre, High Central Ridge, 2500 ft, Apr. 1967 / Coll. Mus. Tervuren, Seconda Mission Zoologique à Sainte-Hélène, J. Decelle, N. et J. Leleup [ RMCA].

Etymology

The species is named for the island of origin.

Diagnosis

Mid tibia considerably dilated along entire length and curved; mid basitarsus with thick apical tooth, about 1/3 the length of next segment; postpedicel about 4 times longer than high, with drawn-out apex.

Description

Male

Similar to C. meridionalis sp. nov. in all respects except as noted.

LENGTH (mm). Body 1.5, wing 1.9/0.6, antenna 0.6, hypopygium 0.2.

HEAD. Antennal postpedicel brown, long haired, about 4 times longer than high, with drawn-out apex ( Fig. 2A ); length ratio of scape to pedicel to postpedicel to stylus, 5/3/19/28.

LEGS. Including fore coxa yellow, mid coxa brown and hind coxa brownish at base; fore leg simple; fore femur with fine subapical posteroventral seta; fore tibia with fine subapical posterior seta; mid femur without flat ventral strip, without subapical ventral excavation, with anteroventral and posteroventral rows of setae in distal half, nearly as long as height of femur; mid tibia laterally flattened and strongly thickened along entire length, widest at 3/4, shallow ventral subapical excavation; mid tibia with row of short erect hairs on basal half, with group of about 10 black spinules ventrally at widest point, with sparse irregular anterior and posterodorsal rows of long setae, about as long as maximal width of tibia, with strong subapical ventral bristle; mid basitarsus thick and slightly curved, with thick black apicoventral tooth, about 1/3 the length of next segment ( Fig. 2E ); hind femur with single strong subapical anterior bristle, with row of about 5 long stiff ventral cilia on distal half, with few subapical posteroventral cilia. Fore leg length ratio (from tibia to tarsomere 5): 35/18/8/7/5/6, mid leg: 50/13/12/10/7/7, hind leg: 58/12/18/11/7/8.

WING. ( Fig. 2B ). hyaline; ratio of cross-vein dm-cu to distal part of CuA 1, 9/22.

Female

Unknown.

Differential diagnosis

Having subequal in length first two segments of mid tarsus and bearing strong apicoventral spine on mid basitarsus, the new species belongs to C. atlanticus group of species, being close to C. meridionalis sp. nov., but strongly differing in flattened and thickened mid tibia and mid leg ornamentation (see key below).

Figures

Fig. 2. Campsicnemus sanctaehelenae sp. nov., ♂ holotype. A. antenna. B. wing. C. mid femur. D. hind femur and tibia. E. mid tibia and tarsus.