Protomedetera singaporensis Grootaert & Tang

Tang, Chufei, Grootaert, Patrick & Yang, Ding, 2018, Protomedetera, a new genus from the Oriental and Australasian realms (Diptera, Dolichopodidae, Medeterinae), ZooKeys 743, pp. 137-151 : 142-145

Protomedetera singaporensis Grootaert & Tang sp. n. Figs 9, 10

Diagnosis.

Width of face at middle 1.4 times as wide as first flagellomere. Pedicel with only one long black apical bristle 1.5 times as long as total length of pedicel and first flagellomere. Surstylus with four long apical bristles. Cercus with one long apical bristle.

Description.

Male (Fig. 9). Body length 1.8 mm, wing length 1.8 mm, wing width 0.6 mm.

Head metallic green, nearly black, with grey pollinosity; eyes separated; face nearly parallel, width of face at middle 1.4 times as wide as first flagellomere. Hairs and bristles on head black except postocular bristles and posteroventral hairs pale. Two strong oc, two strong vt. Antenna dark yellow except first flagellomere black; scape short and small, almost invisible; pedicel cup-like, large, with first flagellomere sunken in it, with circlet of bristles, all yellow and short except one black and long, 1.5 times as long as total length of pedicel and first flagellomere; first flagellomere small, rounded, nearly as long as wide, pubescent; arista black, pubescent, nearly as long as head, with basal segment extremely short, less than 0.1 times length of apical segment. Ocellar tubercle distinct but not strongly raised. Upper postcranium deeply concave. Proboscis brown with brown apical hairs; palpus brown, small, with strong brown apical bristle.

Thorax raised dorsally at front area, dark metallic green, with some grey pollinosity. Mesonotum flat before scutellum. Hairs and bristles on thorax pale; two h, one ph, one su, two npl, two sa, one pt, five dc, six biseriate acr at anterior 3/5 portion. Shoulder portion densely covered with short bristles. Scutellum with one pair of strong sc.

Legs mainly yellow but coxae, basal 4/5 of femora and tarsomere V brown. Hairs and bristles on legs pale. Bristles on legs thin and hair-like. Fore and mid coxae each with two rows of anterior bristles. Hind femur with one preapical pv. Mid tibia with one ad at basal 1/3 and one short apical bristle. Hind tarsomere I somewhat shortened and flat. Tibiae and five tarsomeres of legs LI: 2.4: 1.0: 0.5: 0.4: 0.3: 0.5; LII: 3.5: 1.2: 0.8: 0.5: 0.3: 0.4; LIII:4.5: 1.7: 0.8: 0.5: 0.3: 0.5. Wing nearly hyaline, tinged light yellow; veins light brown, R4+5 and M parallel. CuAx ratio 0.125. Squama pale with long pale hairs. Halter pale.

Abdomen metallic green with grey pollinosity except first segment, with one large black spot laterally at segment V. Hairs and bristles black. Hypopygium (Fig. 10a): simple, brown. Hairs and bristles pale. Epandrium nearly rectangular, about 2.5 times as long as wide; epandrial lobe indistinct, only left one row of four long apical bristles. Surstylus (Fig. 10b) simple, finger-like, fused with epandrium, with four long spine-like apical bristles. Cercus (Fig. 10c) nearly oval, 3.2 times as long as wide, slightly narrow at tip, with row of long marginal bristles at apical half, covered by short weak peg-like bristles Hypandrium simple, narrowed towards tip. Phallus simple but hooked apically, mainly hidden in hypandrium.

Female. Unknown.

Etymology.

The name singaporensis refers to the Republic of Singapore where this species was found.

Material examined.

Holotype male: SINGAPORE, Nee Soon (swamp forest), 2 May 2012 in Malaise trap NS2 (leg. J. Puniamoorthy; in coll. LKCNHM with reference R_ckq_DOL_ZRCBDP00005503_Protomedetera_sp_M_NS2).

The NGS barcode is deposited in GenBank accession number: BankIt2080950 Seq1 MG820472.