Phasia lauta Sun

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 174-175

publication ID 10.11646/zootaxa.276.1.1

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scientific name

Phasia lauta Sun

sp. nov.

3.6.9 Phasia lauta Sun   , sp. nov.

(Figures I­28, II­8.1)


Holotype ♂, INDONESIA, North Borneo, Upper Kinabatangan R., ii.1950, J.K. Cox. [ex: Com. Inst. Ent. Coll., No.11687] (BMNH).


Body length: 7.5 mm.

MALE: HEAD. Head compressed anteriorly. Eyes separated by a distance as wide as single ocellus. Fronto­orbital plate black; greyish yellow pruinose, one row of hairs laterally. Frontal vitta triangle, black. Frontal vitta at base of antennae 2.1 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae present; inner vertical setae present. Face black, yellow pruinose. Parafacial black, greyish yellow pruinose, bare, 1.1 times as wide as first flagellomere. Lower margin of face perpendicular, not projecting; orange yellow, yellow pruinose. Vibrissa well differentiated; intervibrissal distance as long as distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/4. Gena black with grey pruinosity and yellow pruinose; hairs white; height 0.11 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 1.1 times as long as pedicel; arista thickened on basal 0.18. Length of oral opening 1.8 times its width. Occiput flattened, white pruinose; hairs white. Palpus brown.

THORAX. Mesoscutum thinly pruinose; presutural area with 4 broad black longitudinal vittae, with fine black hairs. 0+1 acrostichal seta; 0+1 dorsocentral setae; 1 postpronotal seta; presutural supra­alar seta present, strong; 0 postsutural intra­alar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron thinly grey pruinose; hairs black and white or yellow. Anepimeral setae hair­like, black; 1 katepisternal seta; 9­11 meral setae. Scutellum brown, grey pruinose, with two pairs of marginal setae; apical setae present and distinct; discal setae randomly arranged, not in rows. Subscutellum not very prominent. WING. Lower calypter hyaline white. Wing base without scale­like setae. Tegula black. Basicosta yellow. Wing hyaline, narrow; petiole of apical cell 0.26 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter brown. LEGS. Fore femur swollen, black; hairs black. Fore tibia black, without bristles, apically with 0­1 v, 1 pv, 1 d. Fore tarus flatted; black. Fore claws black; 1.3 times as long as fifth tarsomere. Pulvilli brown. Mid femur black; hairs black. Mid tibia black, with 1 v, apically with 1 ad, 1 a, 1 av, 1 pv, 1 p, 1 v and 1 d. Hind femur black; hairs black. Hind tibia black, slightly arched, with 6­7 pd and 4­ 5 ad.

ABDOMEN. Abdominal tergites brownish black; pruinosity absent; longitudinal vitta absent. Relative length of abdominal tergites I+II:III:IV: V = 1.3:1:0.9:1; relative width I+II:III:IV: V = 0.5:1:1:0.8. Hair spots indistinct. TERMINALIA. Syncercus broad triangular, with a shallow notch posteriorly. Surstylus broadened apically, arched dorsally, longer than cercus. Ejaculatory apodeme small, apex bent. Hypandrium shorter than phallapodeme. Pregonite not developed. Postgonite long, pointed, bent ventrally. Phallus very long and broad, about 2.3 times as long as hypandrium, haired dorsally on basal 1/2. Distiphallus membranous.

FEMALE. Unknown.




This specific name is from Latin " lautus" meaning elegant or neat, and refers to the shiny, bare abdominal dorsum.


Royal British Columbia Museum - Herbarium