Phasia singuliseta Sun

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 184-185

publication ID 10.11646/zootaxa.276.1.1

publication LSID

persistent identifier

treatment provided by


scientific name

Phasia singuliseta Sun

sp. nov.

3.6.15 Phasia singuliseta Sun   , sp. nov.

(Figures I­58, II­8.1)


Holotype ♂, INDIA, Coimbatore, (ex: "new cotton bug"), 24.v.1922, Y.R. Rao Coll. (USNM); allotype ♀, INDIA, Coimbatore, (ex: "new cotton bug"), vi.1922, Y.R. Rao Coll., (USNM); paratype, 3♂, INDIA, Coimbatore, (ex: "new cotton bug"), 17 and 24. v.1922, Y.R. Rao Coll (USNM).


Body length: 5­6 mm.

MALE: HEAD. Head spherical or nearly so. Eyes separated by a distance as wide as single ocellus. Fronto­orbital plate black with grey pruinosity, one row of hairs laterally (at middle). Frontal vitta brown, triangular. Frontal vitta at base of antennae 1.6 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 black with grey pruinosity, bare, 1.1­1.2 times as wide as first flagellomere. Lower margin of face projecting, visible in profile, black, yellow pruinose. Vibrissa well differentiated; intervibrissal distance 1.1 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/3. Gena black with grey pruinosity; hairs white; height 0.12 times eye height. Lunule black and shining, brown; sublunular bulla indistinct. Antenna pedicel yellow or brown; first flagellomere black, 1.1 times as long as pedicel; arista thickened on basal 0.3. Length of oral opening 1.3 times its width. Occiput flattened, white pruinose; hairs white. Palpus yellow.

THORAX. Mesoscutum thinly grey pruinose, without black longitudinal vitta or indistinct, with fine black hairs. 0+1 acrostichal seta; 0+1 dorsocentral seta; 1 postpronotal seta; presutural supra­alar seta present, but fine; 0 postsutural intra­alar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron thinly grey pruinose; hairs black. Anepimeral setae medium size, black; 2 katepisternal setae; 5­7 meral setae. Scutellum black with grey pruinosity (thinly), 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 brown. Basicosta yellow. Wing hyaline, narrow; petiole of apical cell 0.40­0.45 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter yellow. LEGS. Fore femur brown to black; hairs black. Fore tibia brown, without bristles, apically with 1 pv, 1 p and 1 d. Fore tarus black. Fore claws brown, apex black; 1.2 times as long as fifth tarsomere. Pulvilli brown. Mid femur brown to black; hairs black. Mid tibia brown, with 2 ad and 1 v, apically with 1 a; 1 av, 1 pv, 1 v and 1 d. Hind femur brown to black; hairs black. Hind tibia brown, arched, slightly shorter than hind femur, with 6 ad and 4 pd.

ABDOMEN. Abdominal tergites with yellow spot or area (syntergite I+II, tergite III, and anterior half of tergite IV yellow); pruinosity yellow; longitudinal vitta distinctly present. Relative length of abdominal tergites I+II:III:IV: V = 1.2:1:0.9:1; relative width I+II:III:IV: V = 0.5:1:1:0.8. Hair spots of tergites IV and V indistinct. TERMINALIA. Syncercus broad, notched posteriorly, with two pairs of indistinct saw teeth. Surstylus longer than cercus, apex broadened, arched dorsally. Ejaculatory apodeme slender. Hypandrium shorter than phallapodeme. Pregonite small. Postgonite strong, bent ventrally, not pointed. Phallus broad and long, 2.6 times as long as hypandrium, haired dorsally on basal 1/2. Distiphallus membranous.

FEMALE. Wing hyaline. Eyes touching. Anterior spine­like setae of hind tibia absent. Sternite VII (sheath) longer than sternite VI, pointed apically, slightly bent, apex straight, sternite VII with linear wrinkles ventrally. Ovipositor bent upward.




The Latin " singuliseta   " refers to the single row of fronto­orbital setae.


Royal British Columbia Museum - Herbarium