Teuchophorus parmatus, Meuffels & Grootaert, 2004

Meuffels, Henk & Grootaert, Patrick, 2004, The genus Teuchophorus in South-East Asia and New Guinea, description of new species, species-groups and their phylogeny (Insecta, Diptera, Dolichopodidae), Journal of Natural History 38 (2), pp. 143-258 : 188-190

Species 26: Teuchophorus parmatus sp. nov. (male and female) (figures 111–116)

Etymology. Lat. parmatus , ‘armed with a small round shield’, alluding to the shape of the wing stigma.

Diagnosis. Small species, with a very large stigma, comparable to T. pusio Mf. & Gr. and T. eurystigma sp. nov. It differs from both of them by its separated eyes, from eurystigma also by its yellow antennae. Legs very poorly bristled: mid tibia with two ad and one pd; hind tibia with only one dorsal bristle.

Material examined. Type material: Thailand: Trang province, Pak Meng , creek in mangrove, 26 October 1997,    male and      three males, two females (No. 97124, leg. P. Grootaert) .

Male

Body length 1.1–1.3 mm; wing length 1.1–1.15 mm.

Head. Frons and face with shining dark metallic green ground colour. Face about half as wide as depth of third antennal segment. Palpi small, brownish yellow, each with a small, brown apical bristlet. Rostrum brownish yellow. Occiput shining blackish green. Chaetotaxy as usual; no postocellars. Postoculars uniseriate, very short, black. Antenna (figure 111): yellow; basal segments feebly browned. Second segment with a circlet of relatively long bristlets, that are longest above. Third segment small, as deep as second segment, deeper than long, with a downward shifted apex. Arista shortly pubescent, about four times as long as antenna; basal aristal segment a little shorter than third antennal segment.

Thorax. Mesoscutum and scutellum shining dark metallic green. Pleurae brown; mesopleura shining dark metallic green. Chaetotaxy as usual; acr uniseriate, short. Propleura with a single short, thin hairlet.

Legs. Legs, including coxae, pale yellow.

Fore leg. Coxa anteriorly with a row of short, pale hairs, that become darker, longer and more bristle-like near tip of coxa. Femur without bristles. Tibia slightly shorter than femur, without bristles or serration. First tarsal segment with a tiny black spinule at ventral base. Length of tibia and tarsal segments (in mm): 0.35: 0.2:0.09: 0.07:0.05:0.06.

Mid leg. Coxa anteriorly on apical half shortly haired. Femur without bristles, apart from a short preapical av. Tibia about as long as femur; two ad, one pd, no ventral bristles. Length of tibia and tarsal segments (in mm): 0.56: 0.21:0.14:0.1:0.05:0.06.

Hind leg. Coxa with a weak, black exterior bristle. Femur (figure 112) without bristles. Tibia (figure 112) about as long as femur; one weak dorsal bristle beyond middle; ventrally a short, weak bristle before middle and about six very short, spinulous bristlets on apical third. Length of tibia and tarsal segments (in mm): 0.53: 0.11:0.17:0.11: 0.06:0.06.

Wing. Wing (figure 113) feebly brownish tinged. A very large, brown stigma, more or less rounded at base (figure 114); its tip reaches to level of tp; spinulation of costa above stigma not longer than elsewhere; bases of r2+3 and r4+5 shifted somewhat downwards below the stigma. r4+5 and m1+2 nearly parallel. Length ratio of basal and apical parts of m1+2 about 7:12. Halters yellow.

Abdomen. Hairs and hind-marginal bristlets on terga dark, very short. Hypopygium (figures 115, 116) brown to dark brown, with small yellow cerci.

Female

Body length 1.15–1.2 mm; wing length 1.15–1.25 mm.

Face broader than in male (nearly as wide as depth of third antennal segment). Wing without stigma; r2+3 and r4+5 not shifted downwards. Oviscapt with a row of black acanthae.