Campsicnemus meridionalis, 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 : 2-4

Campsicnemus meridionalis sp. nov.

Fig. 1

Material examined

Holotype

ST. HELENA: ♂, 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 [ RMCA].

Paratypes

ST. HELENA (one of the specimens with additional label: P. Vanschuytbroeck det. 1971, Campsicnemus mirabilis Frey ): 3 ♂♂, same data as for holotype; ST. HELENA: 3 ♂♂, Centre, High Central Ridge, 2300- 2600 ft, Feb. 1967 / Coll. Mus. Tervuren, Seconda Mission Zoologique à Sainte-Hélène, J. Decelle, N. et J. Leleup; ST. HELENA: 2 ♂♂, Centre, High Central Ridge, 2500 ft, Apr. 1967 / Coll. Mus. Tervuren, Seconda Mission Zoologique à Sainte-Hélène, J. Decelle, N. et J. Leleup; ST. HELENA: 1 ♂, Centre, High Central Ridge, 2600-2700 ft, 16 Sep. 1965 / Coll. Mus. Tervuren, Mission Zool. Ste-Hélène, P. Basilewsky, P.L.G. Benoit et N. Leleup [ RMCA].

Etymology

From the Latin “southern”. Means the southernmost point of the genus’ distribution in the Atlantic Ocean.

Diagnosis

Mid femur with deep ventral subapical excavation; mid tibia and basitarsus densely covered with long setae along entire length; mid basitarsus about 1/3 the length of next segment; antennal postpedicel 3 times longer than high at base, with drawn-out apex.

Description

Male

LENGTH (mm). Body 1.85, wing 2.3/0.65, antenna 0.6, hypopygium 0.2.

HEAD. ( Fig. 1B ). Frons shining blue-violet; ocellar and vertical bristles black, 2/3 the length of antennal stylus; occiput and vertex metallic, brownish-grey pollinose; face with brown background, yellowishgrey pollinose, reduced to thin line at middle, in upper part and in lower part half as wide as height of postpedicel; palpus small, oval, dirty yellow, covered with white hairs and one dark seta; proboscis brownish, extending below eye in lateral view; antenna about as long as head height; scape and pedicel yellow; postpedicel light brown, long haired, about 3 times longer than high, with drawn-out apex; arista-like stylus black, basodorsal, pubescent; length ratio of scape to pedicel to postpedicel to stylus, 5/3/14/30; postocular setae yellow, 2–3 upper postocular setae brown.

THORAX. Mesonotum and scutellum brown-black, with blue metallic reflection; pleura dark brown, grey pollinose, humeri light brown; thoracic setae black: 3 pairs of dorsocentrals (with posterior dorsocentral shorter and finer); 1 notopleural; 1 pair of strong scutellars; acrostichals absent; halter yellow.

LEGS. Including fore and hind coxae yellow, mid coxa brown; 5 th segments of all tarsi brown; fore leg simple, without remarkable setation; mid femur with flat ventral strip along entire length, with deep subapical ventral excavation, with almost complete posteroventral row of setae, half as long as height of femur; mid tibia laterally flattened and slightly thickened along entire length, with basoventral swelling covered with microscopic erect spinules, dense anterior and posterodorsal rows of long setae, 1.5 ‒ 2 times longer than width of tibia, somewhat shorter on distal fourth, with 2–3 apicals; mid basitarsus with dorsal row of setae, about as long as diameter of basitarsus, and with black apicoventral spine, about 1/3 the length of next segment ( Fig. 1E ); hind leg practically simple; hind femur with single strong subapical anterior bristle, with row of about 5 long stiff subapical posteroventral cilia; hind tibia with 1 anterodorsal, 2 posterodorsals and 2–3 apicals. Fore leg length ratio (from tibia to tarsomere 5): 38/21/10/8/6/6, mid leg: 70/12/11/10/7/6, hind leg: 75/18/21/14/8/7.

WING. ( Fig. 1C ). hyaline; R 4+5 and M 1+2 almost straight and parallel behind level of dm-cu; ratio of crossvein dm-cu to distal part of CuA 1, 10/25; calypter yellowish, with brownish cilia.

ABDOMEN. Blackish-bronze, shining, weakly grey pollinose; with short black setae; terga 1–2 with white hairs laterally; hypopygium blackish-brown, with small brown cercus covered with white hairs and with simple black surstylus, not dissected.

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 is related to C. atlanticus , distinctly differing from the latter in mid leg ornamentation (see key below).

Figures

Fig. 1. Campsicnemus meridionalis sp. nov., ♂ holotype. A. habitus. B. head. C. wing. D. mid femur. E. mid tibia and tarsus. F. hind femora.