Phasia latifrons ( Paramonov, 1958 ), Sun & Marshall, 2003

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 194-196

publication ID 10.11646/zootaxa.276.1.1

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Phasia latifrons ( Paramonov, 1958 )

comb. nov.

3.7.2 Phasia latifrons ( Paramonov, 1958)   , comb. nov.

(Figures I­29, II­3.2)

Besserioides latifrons Paramonov, 1958: 596   ­ Crosskey 1973: 111 (catalog) ­ Cantrell and Crosskey 1989: 735 (catalog).


Body length: 2.5 mm.

MALE: HEAD. Head compressed anteriorly. Vertex 0.25 times as wide as head width; eyes separated by a distance wider than ocellar triangle. Fronto­orbital plate black, brownish grey pruinose, 1­2 rows of hairs laterally. Frontal vitta broad, almost parallel. Frontal vitta at base of antennae 2.8 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, 0.2 times as wide as first flagellomere. Lower margin of face projecting, visible in profile, black with grey pruinosity. Vibrissa well differentiated; intervibrissal distance 4 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/5. Gena black with grey pruinosity; hairs black; height 0.12 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 2.1 times as long as pedicel; arista thickened on basal 1/3. Length of oral opening 1.3 times its width. Occiput slightly convex, white pruinose; hairs black. Palpus black.

THORAX. Mesoscutum thinly pruinose, even, without black longititudinal vitta, with fine black hairs. 0+1 acrostichal seta; 1+1 dorsocentral setae; 2 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. Anepimeral setae strongly; black; usually 1 katepisternal setae; 4­5 meral setae. Scutellum black; almost 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 hyaline, 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, with one row of long ad. Fore tibia black, without bristles, apically with 1 av, 1 pv and 1 d. Fore tarus black. Fore claws brown, apex black; 0.9 times as long as fifth tarsomere. Pulvilli black. Mid femur black; hairs black. Mid tibia black, with 1 ad, apically with 1 pd. Hind femur black; hairs black. Hind tibia black, with 3 ad and 3 pd.

ABDOMEN. Abdominal tergites black, syntergite I+II and most part of tergite III dark yellow; grey pruinose; longitudinal vitta absent; outer margin and hind margin of tergites with long setae. Relative length of abdominal tergites I+II:III:IV: V = 1.1:1:1:1; relative width I+II:III:IV: V = 0.6:1:1:0.8. Hair spots distinct. TERMINALIA. Syncercus broad triangular, V­notched posteriorly. Surstylus flattened, bent dorsally, longer than cercus. Ejaculatory apodeme short, knob­like. Hypandrium as long as phallapodeme. Pregonite even, with two saw teeth ventrally. Postgonite long, pointed. Phallus without fine white hairs dorsally, 1.3 times as long as hypandrium. Epiphallus small, partly sclerotized. Phallapodeme not arched. Dorsolateral process longer than ventrolateral process. Ventrolateral process well sclerotized, with several saw teeth apically.

FEMALE: Unknown.


Holotype ♂, [ AUSTRALIA, Australian Capital Territory], A.C.T. Bentora, 5.ii.1952, S.J. Paramonov (ANIC, examined).




Royal British Columbia Museum - Herbarium














Phasia latifrons ( Paramonov, 1958 )

Sun, Xuekui & Marshall, Stephen A. 2003

Besserioides latifrons

Cantrell, B. K. & R. W. Crosskey 1989: 735
Crosskey, R. W. 1973: 111
Paramonov, S. J. 1958: 596