Phasia cylindrata Sun

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 193-194

publication ID 10.11646/zootaxa.276.1.1

publication LSID

persistent identifier

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scientific name

Phasia cylindrata Sun

sp. nov.

3.7.1 Phasia cylindrata Sun   , sp. nov.

(Figures I­16, II­3.3)


Holotype ♂, PAPUA NEW GUINEA, Wau, 1,200m, 22.x.1965, J and M. Sedlacek (BPBM); allotype ♀, same as holotype; paratypes, 1♂ 1♀, PAPUA NEW GUINEA, Vogelkop, Jef Lio I. Sele Straits, 1­5m, 15.viii.1957, D.E. Hardy (BPBM); 4♀, PAPUA NEW GUINEA, Wau, 1,200m, 11­25.x.1965, J and M. Sedlacek (BPBM); 2♀, PAPUA NEW GUINEA, Wau, Morobe Distr., 1,200m, 7.vii.1961 and 23.ix.1962, J. and M. Sedlacek (BPBM); 1♀, PAPUA NEW GUINEA, Dreikikir, Sepik Distr., 400m,, J.L. and M. Gressitt (BPBM); 2♀, [ PAPUA NEW GUINEA], New Britain, Keravat,, 3.vii.1965 and 15.x.1968, R.W. Crosskey and N.L.H. Krauss (BMNH, BPBM).


Body length: 5­7 mm.

MALE: HEAD. Head spherical or nearly so. Eyes separated by a distance as wide as ocellar triangle. Fronto­orbital plate black with grey pruinosity, 1­2 rows of hairs laterally (closed to frontal setae). Frontal vitta black, broad. Frontal vitta at base of antennae 2.2 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae present; inner vertical setae absent. Face black with grey pruinosity. Parafacial black with grey pruinosity, bare, 0.9 times as wide as first flagellomere. Lower margin of face slightly projecting, visible in profile, brown, grey pruinose. Vibrissa well differentiated; intervibrissal distance 2.7 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/5. Gena black with grey pruinosity; hairs black and yellow; height 0.1 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 1.6­1.7 times as long as pedicel; arista thickened on basal 1/3. Length of oral opening 1.1­1.2 times its width. Occiput slightly convex, greyish yellow pruinose; hairs white. Palpus brown.

THORAX. Mesoscutum strongly yellowish grey pruinose, even, without black longitudinal vitta, with fine black hairs. 0+1(2) acrostichal setae; 1(2)+1(2) dorsocentral setae; 1­2 postpronotal setae; presutural supra­alar seta present, strong; 1 postsutural intra­alar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron thinly grey pruinose; hairs black; and without scale­like setae. Anepimeral setae hair­like, black; 3 katepisternal setae; 4­5 meral setae. Scutellum black, shining, without pruinosity, 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 black. Wing pictured; white with light brown infuscation only, extremely narrow; petiole of apical cell 0.3 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter yellow. LEGS. Fore femur black; hairs black. Fore tibia black, without bristles, apically with 1 d. Fore tarus normal; brown. Fore claws yellow; 1.1 times as long as fifth tarsomere. Pulvilli yellow. Mid femur black; hairs black. Mid tibia black, with 1 ad, and 1 v, apically with 1 ad, 1 a, 1 pv, 1 p, 2 v and 1 d. Hind femur black; hairs black; scale­like setae absent. Hind tibia brown; posterodoral side gold yellow pruinose, with 5 pd and 5­ 6 ad.

ABDOMEN. Abdomen slender; Abdominal tergites black; pruinosity golden yellow; longitudinal vitta absent; syntergite I+II with purple area on middle area. Relative length of abdominal tergites I+II:III:IV: V = 1.3:1:1:1.2; relative width I+II:III:IV: V = 0.8:1:1:0.9. Hair spots distinct. TERMINALIA. Syncercus triangular, V­notched posteriorly; apex bent downward. Surstylus flattened, straight, longer than cercus. Ejaculatory apodeme small, knob­like. Hypandrium broad, slightly shorter than phallus and phallapodeme. Phallapodeme not arched. Pregonite triangular. Postgonite shorter than pregonite, apex spherical. Epiphallus sclerotized. Phallus short, without fine hairs dorsally. Distiphallus partly sclerotized, swollen, apex slender, pointed and bent.

FEMALE: Body size smaller than male. Wing hyaline. Eyes separated by a distance wider than the flagellomere. Mesoscutum greyish brown pruinose. Anterior spine­like setae of hind tibia present. Abdominal tergites black shining. Sternite VII (sheath) longer than sternite VI, pointed, apex bent, directed dorsally, sternite VII with linear wrinkles ventrally. Ovipositor bent upward.




Phasia cylindrata   is named for its slender abdomen.


Royal British Columbia Museum - Herbarium