Phasia yunnanica Sun

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 112-114

publication ID 10.11646/zootaxa.276.1.1

publication LSID

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scientific name

Phasia yunnanica Sun

sp. nov.

3.4.19 Phasia yunnanica Sun   , sp. nov.

(Figures I­69, II­10.3)


Holotype ♂, CHINA, Yunnan Province, Lanping, 3,000m, 22.viii. 1984, S. Wang (IZAS).


Body length: 8.5 mm.

MALE: HEAD. Head compressed anteriorly. Eyes separated by a distance 0.5 times as wide as ocellar triangle. Fronto­orbital plate black, yellow pruinose, 7­8 rows of hairs laterally (not reaching to eyes). Frontal vitta triangular, black. Frontal vitta at base of antennae 1.2 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae absent; inner vertical setae absent. Face black with grey pruinosity. Parafacial brown and black with grey pruinosity, bare, 3.5 times as wide as first flagellomere. Lower margin of face projecting, visible in profile, brown, grey pruinose. Vibrissa well differentiated; intervibrissal distance 0.8 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 2/5. Gena black with grey pruinosity; hairs white; height 0.11 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 1.4 times as long as pedicel; arista thickened on basal 0.3. Length of oral opening 2 times its width. Occiput flattened, white pruinose; hairs white. Palpus brown.

THORAX. Mesoscutum thinly grey pruinose, without longitudinal vitta, with fine black hairs. 0+1 acrostichal seta; 0+1 dorsocentral seta; 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, white and yellow; scale­like hair absent. Anepimeral setae medium size; black. 1 katepisternal seta. 8­9 meral setae. Scutellum black, thinly 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 white with light brown infuscation. Wing base without scale­like setae. Tegula black. Basicosta brown. Wing pictured, brown, broad; petiole of apical cell 0.18­0.20 times as long as preceding section of R 4+5; M meeting R 4+5 at acute angle. Halter brown. LEGS. Fore femur black; ventrally and laterally with whitish yellow hairs, dorsally with black hairs. Fore tibia black, without bristles, apically with 1 p. Fore tarus flatted; black. Fore claws brown, apex black, 1.3 times as long as fifth tarsomere. Pulvilli brown. Mid femur black; hairs black. Mid tibia black, with 1 ad and 2 v, apically with 1 ad, 1 a, 1 av, 1 pv, 1 p, 1 pd, 1 v and 1 d. Hind femur black; hairs black (with a long, densely anterodorsal bristle area); scale­like setae absent. Hind tibia brown, with 2 ad and 6­7 pd; hind tarsus with dense golden hairs ventrally.

ABDOMEN. Abdominal tergites black, outer side of syntergite I+II and anterior half of tergite III dark yellow; pruinosity present, but thin; longitudinal vitta absent; outer side of syntergite I+II, tergites III, IV with grey pruinosity; tergite VI and outer side of tergite V with golden yellow pruinosity. Relative length of abdominal tergites I+II:III:IV: V = 1.2:1:1:1; relative width I+II:III:IV: V = 0.6:1:1:0.8. Hair spots indistinct. TERMINALIA. Syncercus long, U­notched posteriorly, apex with a pair of saw teeth. Surstylus extremely long, apex broad and strongly arched dorsally. Ejaculatory apodeme small, knob­like. Hypandrium as long as phallapodeme. Epiphallus well developed. Pregonite black, strong, sharply pointed. Postgonite narrow, pointed. Phallus short, as long as hypandrium, not haired. Distiphallus narrow, membranous.

FEMALE: Unknown.




This specific name is derived from the type locality, Yunnan Province, China.


Phasia yunnanica   can be separated from other species of Phasia   by the extremely long, arched surstylus and the specific structure of hypandrium complex. The male terminalia of the type is stored in glycerine in a micro vial.


Royal British Columbia Museum - Herbarium