Paraclius asiobates, Zhang & Yang & Grootaert, 2007

Zhang, Lili, Yang, Ding & Grootaert, Patrick, 2007, Paraclius (Diptera: Dolichopodidae: Dolichopodinae) Of Singapore, With New Species From Mangroves, Raffles Bulletin of Zoology 55 (1), pp. 49-62 : 52-53

Paraclius asiobates , new species

( Figs. 5–7 )

Material examined. – Holotype: male, Sungei Buloh, 18 May.2005, mangrove, Mal. 1 (25161, coll. PG, Si1192, det. PG, ZRC).

Paratypes: 1 male, Sungei Buloh, 25.May 2005, mangrove, Mal. 2 (25164, coll. PG, Si1215, det. PG, RBINS) .

Diagnosis. – Antenna dark yellow, first flagellomere brown on upper half, yellowish on lower half, 1.7 times as long as wide. Mid femur with 5 to 7 ventral bristles (shorter than width of femur); hind femur with row of black ventral bristles. Aedeagus with denticles. Cercus elongate triangular in lateral view, yellow, with brown marginal clavate bristles.

Description. – Male: Body length 6.6 mm, wing length 4.5 mm.

Head metallic green with pale grey pollen. Face narrowing downward, distinctly narrower than first flagellomere. Hairs and bristles black. Upper 5 postoculars black, mid and lower postocular bristles (including posteroventral hairs) white. Antenna ( Fig. 5 ) dark yellowish brown, first flagellomere brown on upper half, yellowish on lower half, 1.7 times as long as wide; arista apicodorsal, minutely pubescent with very short basal segment. Proboscis brown with black hairs, palpus brown with black hairs and black apical bristle.

Thorax metallic green with pale grey pollen. Hairs and bristles black. Six strong dc, 6 pairs of acr; scutellum with 6 bristles (lateral pair longest). Propleuron with 1 long black bristle (as long as first flagellomere) on lower part among 7 smaller pale hairs; 1 long black bristle in upper part also among 7– 8 hairs. Legs yellow, fore coxa yellow including base, mid coxa anteriorly yellow, exteriorly brown; hind coxa mainly brownish. Hind femur with a small black anterior spot at tip. Fore tarsomeres completely yellow; mid tarsomeres 3–5 brownish, hind tarsus completely brownish black. Hairs and bristles black. Mid and hind coxae each with 1 exterior bristle. Mid and hind femora each with 1 preapical bristle. Fore femur with 3 pv in apical quarter. Mid femur with 5 to 7 v (as long as femur is wide) in basal half; hind femur with row of black v (shorter than femur is wide) on the entirely length. Fore tibia with 3 ad and 2 pd, apically with 2 short bristles; mid tibia with 4 ad, 3 pd and 1 av, apically with 4 bristles; hind tibia with 4 ad, 5 pd and a row of thin v over the entire length (as long as tibia is wide), apically with 4 bristles. Relative lengths of tibia and 5 tarsomeres LI 1.3: 0.63: 0.23: 0.18: 0.15: 0.15; LII 1.8: 0.75: 0.50: 0.35: 0.25: 0.18; LIII 2: 0.58: 0.85: 0.63: 0.38: 0.2. Wing greyish, veins black; R 4+5 and M distinctly convergent, apical part of M concave towards wing border. CuAx ratio 0.7. Squama white with black hairs. Halter white.

Abdomen metallic green with pale grey pollen. Hairs and bristles black. Tergite 4 and 5 with long black bristles ventrally at side. Male genitalia ( Figs. 6–7 ): Epandrium longer than wide; lateral lobe long finger-like with 3 bristles; cercus clear yellow; elongate triangular with a row of brown marginal bristles, those on apical half with a clavate tip. Hypandrium thick; aedeagus denticulate.

Female: Unknown.

Etymology. – The name asiobates comes from the Greek asis, mud, slime, and bates, one that walks: referring to its occurrence on the mud flats in the mangrove.

Distribution. – Singapore, mangrove.

Figures

Figs. 5–7. Paraclius asiobates, new species: 5, antenna; 6, male genitalia; 7, surstyli.