Lichtwardtia conspicabilis Tang & Grootaert

Tang, Chufei, Yang, Ding & Grootaert, Patrick, 2018, Revision of the genus Lichtwardtia Enderlein in Southeast Asia, a tale of highly diverse male terminalia (Diptera, Dolichopodidae), ZooKeys 798, pp. 63-107 : 63

Lichtwardtia conspicabilis Tang & Grootaert sp. n. Figs 12, 13

Material examined.

Holotype male (coll. RBINS): CAMBODIA: Siem Reap prov., Angkhor, Preah Khan Temple, 6 June 2006; sweep netting (leg. Oul Yothin). Paratypes (coll. RBINS): CAMBODIA: 2 males, locality same to the holotype, 4-14 April 2006, Malaise trap (leg. Oul Yothin).

Diagnosis.

Antenna nearly entirely dark yellow. Wing brownish tinged, a distinct swelling of the costa present just before R1 joins the costa. Mid coxa with two light brown bands laterally. Hind coxa entirely yellow. Cercus with elongate tip bearing a longer bristle than the other marginals; hypandrium with bifurcate tip and a black curved appendage on the right-hand side. Phallus wide, with preapical ventral process.

Description.

Male.Body length 3.7 mm, wing 3.5 × 1.1 mm.

Head dark metallic green, with thick pale pollinosity; face slightly raised, frons and face both with thick pale pollinosity, gradually narrowed downward. Hairs and bristles on head black; upper four postocular bristles black but all lower postoculars pale. Antenna dark yellow except portion at level of arista-like stylus slightly brownish. Postpedicel nearly triangular, blunt apically, with brown pubescence, nearly as long as wide; arista-like stylus dark brown, nearly as long as width of head, feather-like, with long pubescence, basal portion 0.2 times as long as apical portion. Proboscis dark yellow, with black hairs; palpus dark yellow, with one short weak black apical bristle.

Thorax dark green, with pale grey pollinosity. Hairs and bristles on thorax black; five strong dc, ten pairs of long acr. Scutellum with two pairs sc, apical pair long and strong, basal pair very short and weak. Legs mainly yellow, but mid coxa with two light brown bands laterally, hind coxa entirely yellow. Fore and mid coxae anteriorly to laterally with rows of bristle-like hairs and six marginal bristles; mid coxa with one outer bristles at apical third, hind coxa with two outer bristles, basal one strong, apical one weak. Mid trochanter with two ap. Hind trochanter with one outer hair at middle. Fore femur without distinct bristles. Mid femur with one strong ad and one preapical pv. Hind femur with one strong anterior on apical fourth. Fore tibia with three ad, one av and three ap (of which one posterodorsal very long). Mid tibia with two ad, five pd, two pv, and four ap. Hind tibia with three ad, two pd, one pv and four ap. Fore tarsomere I with one short av at base. Hind tarsomere I with one strong dorsal beyond middle, two short av close to base and two short apical bristle. Relative lengths of tibia and five tarsomeres of legs LI: 10.0: 4.0: 2.5: 2.0: 1.5: 1.5; LII: 16.0: 7.5: 4.0: 3.0: 1.5: 1.0; LIII: 18.0: 7.5: 7.5: 6.0: 4.0: 2.5. Wing brownish tinged, veins brown. M with fading M2, M1 with one short subvein. Crossvein dm-cu straight. CuAx ratio 1.3. Lower calypter pale with long black hairs. Haltere white.

Abdomen metallic green, with pale pollinosity. Hairs and bristles on abdomen black.

Male terminalia (Figure 13): Epandrium 1.6 times longer than wide. Surstylus with several digitations. Cercus ovoid with short apical process, pale except the black seam around the apical margin, with weak digitations around outer margin only, ventral marginal bristles black; with elongate tip bearing a longer bristle than the other marginal, a long black inner bristle below the tip. Hypandrium thick, with bifurcate tip and a black curved appendage on the right-hand side. Phallus wide, with preapical ventral process.

Female. Unknown.

Comments.

This species resembles superficially L. polychroma in having a swelling of the costa and by the similar elongate cercus and the complicated structure of the tip of the hypandrium. However, L. polychroma possesses a large brown tooth at the right side. L. conspicabilis sp. n. has a curved black extension of the left side and the tip of the phallus is deeply indented.

Etymology.

The name conspicabilis refers to the remarkable structure of the hypandrium.

Distribution.

Cambodia.