Protomedetera bico nvexa, 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 : 138

Protomedetera bico nvexa sp. n. Figs 1, 2

Diagnosis.

Pedicel with four apical bristles twice as long as total length of first flagellomere and pedicel. Vein costa bold at basal 1/3. Cercus short thick, with two round apical protuberances each with a strong apical bristle. Hypandrium with one irregular process at apical 2/5 to 1/4, sharp apically. Phallus not modified.

Description.

Male (Fig. 1). Body length 1.7 mm, wing length 1.5 mm, wing width 0.7 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 pale. Two strong oc, two strong vt. Antenna wholly yellow; scape short and small, almost invisible; pedicel cup-like, large, with first flagellomere sunken in it, with circlet of apical bristles of which four very long strong, distinctly covering first flagellomere, twice as long as total length of first flagellomere and pedicel; first flagellomere small, rounded, nearly as long as wide, with tiny pubescence; arista black, almost bare, nearly as long as head width, with basal segment 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 and short strong apical bristle; palpus yellow, slightly raised, rounded, with black preapical bristle.

Thorax raised dorsally at anterior area, dark metallic green, with some grey pollinosity. Mesonotum flat before scutellum. Pp with one strong spine-like bristle at lower 1/3. Hairs and bristles on thorax black; two h, one ph, one su, two npl, two sa, one pt, five dc, six biseriate acr at anterior portion. Anterior portion densely covered by short bristles. Scutellum with one pair of strong sc.

Legs mainly yellow except mid and hind coxae, dorsum of mid and hind femora brown. Hairs and bristles on legs mainly black. One weak prothoracic bristle above fore coxa. Fore coxa at a distance with mid coxa. Mid and hind coxae each with one weak outer bristle at middle. Femora without distinct bristles. Mid tibia with one ad at middle and three apical bristles. Hind tibia with two tiny apical bristles. Hind tarsomere I somewhat shortened and flat. Tibiae and five tarsomeres of legs LI: 2.0: 1.0: 0.3: 0.3: 0.2: 0.4; LII: 3.0: 1.5: 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, costa vein thickened at basal 1/3, R4+5 and M parallel. CuAx ratio 0.25. Squama pale with long pale hairs. Halter pale.

Abdomen metallic green with grey pollinosity. Hairs and bristles black. Hypopygium (Fig. 2): Epandrium yellowish. Hairs and bristles pale. Epandrium nearly rectangular, twice as long as wide; epandrial lobe indistinct. Surstylus wide, finger-like, rounded at tip, with ten bristles, of which one extremely long. Cercus short thick, with two round apical protuberances each with one long strong apical bristle. Hypandrium with one irregular process at apical 2/5 to 1/4, sharp at tip. Phallus normal.

Female. Unknown.

Etymology.

The name biconvexa means two protuberances, referring to the two apical two protuberances of the cercus.

Material examined.

Holotype male, PAPUA NEW GUINEA, Madang province, Baiteta (4°59'10.36"S, 145°45'47.05"E) FOG XH, 16/III/1994, leg. Olivier Missa (coll. RBINS).

Paratypes: PAPUA NEW GUINEA, Madang province, Baiteta (4°59'10.36"S, 145°45'47.05"E), FOG AR 15, 15/VI/1995, leg. Olivier Missa; 1 male, FOG AR 24, 5/VII/1995; 1 male, FOG XJ, 7/IV/1994 (coll. RBINS). MALAYSIA: 1 male, Pulau Tioman, Salang, 13/VII/ 2005 (leg. I. Van de Velde) (coll. RBINS).