Condylostylus comorensis, Grichanov, 2020

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 : 65-66

Condylostylus comorensis sp. nov.

( Fig. 1 )

urn:lsid:zoobank.org:act:94B102B9-E38E-4F05-AD42-273DF41BB91C

Diagnosis. Condylostylus comorensis sp.nov. is remarkable in combining some MSSC of the C. paricoxa and C. burgeoni species groups ( Grichanov 2010), being close to C. danieli from Tanzania and C. ulrichi from Kenya. The new species differs in the following combination of characters: frons with strong anterior vertical bristle and 1–2 hairs arising from small mound; face almost obliterate in middle; fore tibia with 1 curved apicoventral bristle; fore basitarsus strongly widened except basal fifth, with 1 long basoventral bristle; mid tibia flattened ventrally on basal half; mid tarsomeres 4 and 5 enlarged and flattened; cercus filiform, 7 times longer than epandrium.

Description. Male (strongly discolored due to long-term storage in ethanol). Body length 7 mm; antenna length 1 mm; wing length 4.6 mm; wing width 1.3 mm. Head ( Fig. 1A ): frons metallic blue-green, shiny; strong anterior vertical bristle (broken) and 1–2 hairs arising from small mound; upper postocular setae black, short; ventral postcranium covered with irregular white hairs; eyes almost contiguous in middle of face; face under antennae 5 times wider than postpedicel; clypeus slightly bulging; antenna ( Fig. 1B ) shorter than height of head; pedicel with short bristles, with 1 long dorsal bristle; postpedicel subtriangular, slightly longer than high (10/7), with short hairs; arista-like stylus dorsal, microscopically haired; length (mm) of scape, pedicel, postpedicel, stylus (segments 1 and 2), 0.08/0.08/0.1/0.09/0.71; palpus with white and black hairs. Thorax: 6 dorsocentral bristles gradually decreasing in size anteriorly with 2 strongest posterior pairs; acrostichals short, biserial; scutellum with 2 pairs of strong setae. Leg s: Fore and mid coxae with hairs and 2 subapical setae; hind coxa with 1 seta at base; femora without strong or long setae; fore tibia ( Fig. 1C ) with 1 curved apicoventral bristle, 1/5 as long as basitarsus; fore basitarsus strongly widened and flattened except basal fifth, 4 times longer than wide, with ventral pile, 1 long basoventral bristle, 2/5 as long as basitarsus, posteroventral elongate setulae in basal two-fifths, row of elongate setulae along anterodorsal margin of flattened part; mid tibia flattened ventrally on basal half, without setae; mid tarsomeres 4 and 5 ( Fig. 1D ) enlarged and flattened, with elongate setulae; hind basitarsus with small basoventral seta; tarsomeres 3–5 of hind leg slightly thickened ( Fig. 1E ); femur, tibia and tarsomere (from first to fifth) length ratio (mm): fore leg: 1.25/1.94 /0.91/0.56/0.35/0.27/0.17, mid leg: 1.74/3.22/2.33/0.38/0.23/0.15/0.28, hind leg: 2.41/3.59/1.75/0.52/0.3/0.23/0.15. Wing: widened apically; R 4+5 gently curved to M 1 in apical fifth; M 1+2 straight in basal half, slightly convex anteriad in middle part; M 1 with nearly right-angular elbow, forming acute angle with M 1+2 and obtuse angle with M 2; ratio of parts of costa between R 2+3 and R 4+5 to those between R 4+5 and M 1, 10/1; crossvein dm-m straight; ratio of crossvein dm-m to apical part of M 1+2 (fork-handle) to apical part of M 4, 48/104/34; anal vein and lobe reduced; anal angle absent; lower calypter with fine light cilia. Abdomen: thin and long, with short black hairs; segment 1 with white hairs; pregenital segments combined about 2.5 times as long as mesonotum; hypopygium ( Fig. 1F ) with short dark hairs; cercus long, filiform, slightly broadened at base, without basoventral lobe, densely covered with numerous short dark setae dorsally, somewhat sparser on distal half, with longer simple setae on basal third ventrally; cercus 7 times longer than epandrium; surstylus and epandrial lobe greatly reduced. Female. Unknown.

Etymology. The species is named after the Comoros archipelago.

Type material. HOLOTYPE ♂, labelled: [ Comoros:] “Comoren, Grand Comore, Bahani, Weg zur Grotte Cpt. Dubois” [ Path to Captain Dubois grot; 11°38ʹ31ʹʹS, 43°18ʹ29ʹʹE], 600–800 m, 12.iv.2002, M. Kotrba ( ZSM).

Distribution. Comoros.

Figures

FIGURE 1. Condylostylus comorensis sp. nov., male in glycerol. A. Head. B. Antenna. C. Fore tibia and tarsus. D. Mid tarsus. E. Hind tarsus. F. Segments 4–6 of abdomen and hypopygium, right lateral view.