Protomedetera biseta, Tang, Chufei, Grootaert, Patrick & Yang, Ding, 2018

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 : 139-142

Protomedetera biseta sp. n. Figs 3, 4

Diagnosis.

Pedicel with two long apical bristles 1.5 times as long as total length of pedicel and first flagellomere. Cercus nearly oval, 3.6 times as long as wide, narrow at tip, with several long apical marginal bristles and some short peg-like bristles. Hypandrium simple, rounded apically in lateral view. Phallus thin, hook-like apically, with a preapical denticle.

Description.

Male (Fig. 3). Body length 2.0 mm, wing length 1.7 mm, wing width 1.2 mm.

Head metallic green, nearly black, with grey pollinosity; eyes separated; face nearly parallel, width of face at middle as wide as first flagellomere. Hairs and bristles on head black, postocular bristles and posteroventral hairs short and pale. Two strong oc, two strong vt. Scape and pedicel yellow; scape short and small, almost invisible; pedicel cup-like, large, with first flagellomere sunken in it, with circlet of apical bristles of which two bristles 1.5 times as long as total length of pedicel and first flagellomere; first flagellomere small, rounded, brown, nearly as long as wide, with tiny pubescence; arista black, almost bare, nearly as long as head, with basal segment extremely short, less than 0.1 times as long as apical segment. Ocellar tubercle distinct but not strongly raised. Upper postcranium deeply concave. Proboscis yellow, not strongly sclerotized, with light thin lines; palpus yellow, slightly raised, rounded, with yellow preapical 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, six dc, five biseriate acr at anterior 1/2. Shoulder portion covered by short bristles. Scutellum with one pair of strong sc.

Legs mainly yellow except mid and hind coxae brown. Hairs and bristles on legs mainly pale. One weak prothoracic bristle above fore coxa. Fore coxa with row of bristles anteriorly. Hind coxa with one weak outer bristle. Fore femur with six pv (three at basal 1/6, three at apical 1/6). Hind femur with four pv at apical 1/4. Mid tibia with one ad at basal 1/3 and three apical bristles. Hind tibia with two apical bristles. Hind tarsomere I somewhat shortened and flat. Tibiae and five tarsomeres of legs LI: 2.5: 1.1: 0.5: 0.3: 0.2: 0.4; LII: 3.6: 1.3: 0.8: 0.5: 0.3: 0.4; LIII:3.5: 0.8: 1.0: 0.8: 0.4: 0.5. Wing nearly hyaline, tinged light yellow; veins light brown, R4+5 and M parallel. CuAx ratio 0.2. Squama pale with long pale hairs. Halter pale.

Abdomen metallic green with grey pollinosity. Hairs and bristles black. Hypopygium (Fig. 4a): Hairs and bristles pale. Epandrium nearly rectangular, three times as long as wide; epandrial lobe faded with two spinous bristles. Surstylus (Fig. 4b) simple, with three long spine-like bristles. Cercus (Fig. 4c) nearly oval, 3.6 times as long as wide, narrow at tip, with several long apical marginal bristles and some short peg-like bristles. Hypandrium simple, rounded apically in lateral view. Phallus thin, hook-like apically in lateral view, with one preapical denticle.

Female. Unknown.

Etymology.

The name biseta refers to the two long bristles on the pedicel.

Material examined.

Holotype male: PAPUA NEW GUINEA, Madang province, Baiteta (4°59'10.36"S, 145°45'47.05"E), FOG AR 40, 3/VIII/1995, leg. Olivier Missa (in coll. RBINS).

Paratypes: PAPUA NEW GUINEA, Madang province, Baiteta (4°59'10.36"S 145°45'47.05"E), 2 males, FOG AR 1, 27/IV/1995, leg. Olivier Missa; 1 male, FOG AR 15, 15/VI/1995; 1 male, FOG XA 9, 9/IV/1993, leg. Olivier Missa (in coll. RBINS).