Teuchophorus ornatuloides, 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 : 152-154

Species 3: Teuchophorus ornatuloides sp. nov. (male)

(figures 7–12)

Etymology. Resembling the species T. ornatulus .

Diagnosis. Rather large species, without stigma. Eyes touching on face. Antenna dark brown; third segment wider than long. Hind margin of wing with a ‘flag’, consisting of only two or three agglutinated, bent bristles. Mid tibia bent, ventrally concave on apical half, with a long, flattened, yellow ventral bristle. Mid femur ventrally near base with very long, partly coagulated bristles. Hind femur with a black ventral bristle.

Material examined. Thailand, Trang province: Trang, riverbanks in secondary rain forest, 26 October 1997,    male and two      male (No. 97121, leg. P. Grootaert) ; Loei province, Na Haeo , waterfall near SWU-FIRS, 8 April 2001, three males (No. 21044, leg. P. Grootaert) .

Male

Body length 1.6 mm; wing length 1.3 mm.

Head. Frons and face with shining dark metallic ground colour. Eyes touching each other on lower half of face. Palpi yellowish brown, each with a small black apical bristlet. Rostrum yellowish brown. Occiput shining greenish black. Chaetotaxy as usual; two very small postocellars. Postoculars uniseriate, dark. Antenna (figure 9): basal segments dark brown, third segment lighter brown, yellowish brown basally. Marginal bristles on second segment very short, longer on upperside. Third segment wider than long, with a very short, downward shifted, rather blunt apex. Arista nearly three times as long as antenna, very shortly pubescent; basal aristal segment nearly as long as third antennal segment.

Thorax. Thorax and scutellum shining dark metallic green; pleurae partly dark brown. Chaetotaxy as usual; acr uniseriate, rather long. Scutellum without lateral hairs. No propleural bristles or hairs.

Legs. Legs and coxae yellow. Mid coxa with a pale brown streak. Hind femur brownish on apical third.

Fore leg. Coxa anteriorly with short, yellow hairs, that grow longer and become bristle-like downwards. Femur with two short and weak preapical pv. Tibia shorter than femur (about 4:5), without bristles or serration. First tarsal segment without ventral spinules at base. Length of tibia and tarsal segments (in mm): 0.3:0.15:0.05: 0.04:0.04:0.06.

Mid leg. Coxa anteriorly shortly haired. Femur (figure 7) slightly thickened on basal half; ventrally, at one-quarter from base, one short, and two very long, yellow hairs, partly coagulated, the longest of which is twice as long as depth of femur; a small preapical av. Tibia (figure 7) a little shorter than femur, on apical half feebly bent and ventrally concave; in this concavity, at three-quarters from base of tibia, a long, flattened, yellow bristle; ventrally at apex a nearly equally long black bristle; at one-third from base a black pd; about middle a shorter, black pv; a preapical black ad, preceded by a few short, bent bristly hairs. First tarsal segment with a minute black spinule at ventral base. Length of tibia and tarsal segments (in mm): 0.4:0.17:0.12: 0.1:0.07: 0.06.

Hind leg. Coxa with a weak, black exterior bristle. Femur (figure 8) at about one-third from base with a black ventral bristle, shorter than depth of femur; on apical third two or three av, the first of which is slightly longer than diameter of femur; at one-quarter from base a small anterior bristle. Tibia (figure 8) about as long as femur; three weak, short dorsal bristles on apical half, the longest of which is hardly longer than diameter of tibia; posteroventrally, on basal half, a row of short hairs, shorter than diameter of tibia; ventrally on apical half a crowding of very short, spine-like bristles; this row continues on the first two tarsal segments. Length of tibia and first three tarsal segments (remainder of tarsus broken of) (in mm): 0.5:0.1: 0.16:0.11.

Wing. Wing (figure 10) feebly brownish tinged. No stigma; costa feebly thickened. r4+5 and m1+2 nearly parallel, very slightly diverging near wing tip. Length ratio of basal and apical parts of m1+2 about 4:7. Hind margin of wing regularly curved; on lowest part of axillary lobe a narrow ‘flag’ (figure 11), consisting of two or three coagulated, apically bent, dark bristles. Halters yellow. Squamae yellow, with a broad, dark brown border, and brownish cilia.

Abdomen. Terga dark brown, feebly shining, with very short, dark hairs and hind-marginal bristlets. Sterna dark brown. Hypopygium (figure 12) moderately large, dark brown.

Female Unknown.

Discussion

Closely related to T. ornatulus sp. nov. and T. vexillifer sp. nov. by shape and bristling of mid tibia. It shares with ornatulus the long bristles on mid femur, but that species does not have a ‘flag’ on wing margin, nor a ventral bristle on hind femur; vexillifer has a flag consisting of six bristles, and it has no long bristles on mid femur.