Phasia serrata Sun

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 56-57

publication ID 10.11646/zootaxa.276.1.1

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Phasia serrata Sun

sp. nov.

3.3.6 Phasia serrata Sun   , sp. nov.

(Figures I­55, II­7.1)


Holotype ♂, PHILIPPINES, Negros OR., Mt. Talinas, 1,000m, 29­31. 1960, H. Torrevillas (BMBP); paratype 1♂, PHILIPPINES, Luzon, Dalton Pass, 915m, Nueva Vizcaya, 9­10.iv.1968, (Malaise trap) D.E. Hardy and M.D. Delfinado (BMBP).


Body length: 3 mm.

MALE: HEAD. Head spherical or nearly so. Eyes separated by a distance 0.5 times as wide as ocellar triangle. Fronto­orbital plate black, blackish grey pruinose; 6­7 rows of hairs laterally (reaching to eyes). Frontal vitta black. Frontal vitta at base of antennae 0.9 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae present; inner vertical setae present. Face black with grey pruinosity. Parafacial black with grey pruinosity; upper part haired; 1.6­1.7 times as wide as first flagellomere. Lower margin of face perpendicular, not projecting, brown, grey pruinose. Vibrissa well differentiated; intervibrissal distance 1.9­2.1 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 3/5. Gena brown and black with grey pruinosity; hairs black and white; height 0.1 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 0.3. Length of oral opening 1.4 times its width. Occiput flattened, white pruinose; hairs black. Palpus black.

THORAX. Mesoscutum black, strongly pruinose, without black longitudinal vitta, with fine black hairs. 0+1 acrostichal seta; 0+1 dorsocentral seta; 1­2 postpronotal setae; presutural supra­alar seta present, strong; 1 postsutural intra­alar seta; 2 notopleural setae; 1­2 supra­alar setae; 2 postalar setae. Pleuron thinly grey pruinose; hairs black; and without scale­like setae. Anepimeral setae hair­like, black; 2 katepisternal setae; 6­8 meral setae. Scutellum black; blackish 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 brown to black. Wing base without scale­like setae. Tegula black. Basicosta black. Wing pictured; white with light brown infuscation, narrow; petiole of apical cell 0.45 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter brown. LEGS. Fore femur black; hairs black. Fore tibia black, without bristles, apically with 1 v, 1 pv and 1 d. Fore tarus black. Fore claws black; 1.1 times as long as fifth tarsomere. Pulvilli brown. Mid femur black; hairs black. Mid tibia black. Hind femur black; hairs black; scale­like setae absent. Hind tibia black, with 6 pd and 4 ad.

ABDOMEN. Abdominal tergites black; pruinosity present, but thin; longitudinal vitta absent. Relative length of abdominal tergites I+II:III:IV: V = 1.1:1:1:1.1; relative width I+II:III:IV: V = 0.4:1:1:0.8. Hair spots indistinct. TERMINALIA. Syncercus triangular, shallowly notched posteriorly; apex with a pair of saw teeth. Surstylus slender, straight, much longer than cercus. Ejaculatory apodeme small, knob­like. Hypandrium broad, shorter than phallapodeme. Pregonite spherical. Postgonite long and sharp pointed. Epiphallus well developed. Phallus slender, longer than hypandrium, basal half haired dorsally. Distiphallus partly sclerotized.

FEMALE: Unknown.




The Latin "serrus" means sawteeth, referring to the cerci, which have a pair of sawteeth posteriorly.


Royal British Columbia Museum - Herbarium