Phasia japanensis Sun

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 87-89

publication ID 10.11646/zootaxa.276.1.1

publication LSID

persistent identifier

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scientific name

Phasia japanensis Sun

sp. nov.

3.4.10 Phasia japanensis Sun   , sp. nov.

(Figures I­26, II­10.4)


Holotype ♂, JAPAN, Nagano, Shimashima, Azumi­mura, 4.x.1988, E. Suglyama (BLKU); allotype ♀, JAPAN, Aomori Co., Asamushi, 18.x.1980, Sho Fukushi (BLKU); paratypes, 1♀, same as allotype (BLKU); 1♂ 1♀, JAPAN, Ishikawa, P. Shiramine, 10.x.1964, S. Takano (ZMPA); paratypes, 2♂ 8♀, JAPAN, Honshu, Tochigi, 600m, Shiobara Spa., 25­26.x.1988, H. Kurahashi (NIHJ).


Body length: 8­13 mm.

MALE: HEAD. Head compressed anteriorly. Eyes separated by a distance as wide as ocellar triangle. Fronto­orbital plate black with grey pruinosity; 6­7 rows of hairs laterally (not 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 absent. Face black with grey pruinosity. Parafacial brown; grey pruinose, almost bare, 2.2 times as wide as first flagellomere. Lower margin of face projecting, visible in profile, orange yellow, grey pruinose. Vibrissa well differentiated; intervibrissal distance 0.9­1 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 2/5. Gena brown, grey pruinose, with a yellow spot; hairs white; height 0.18 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 1.2 times as long as pedicel; arista thickened on basal 0.25. Length of oral opening 2.1 times its width. Occiput flattened, white pruinose; hairs black. Palpus yellow.

THORAX. Mesoscutum shining, without pruinosity, with fine black hairs. 0+1 acrostichal seta; 0+1 dorsocentral seta; 2 postpronotal setae; presutural supra­alar seta present, strong; 0­1 postsutural intra­alar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron thinly grey pruinose; hairs black; and without scale­like setae. Anepimeral setae medium size, black; 1 katepisternal seta; 11­13 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 white with light brown infuscation. Wing base without scale­like setae. Tegula black. Basicosta black. Wing pictured; white with light brown infuscation, broad; petiole of apical cell 0.18­0.2 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, dorsal surface with black hairs. Fore tibia black, with 1­2 p, apically with 1 p and 1 d. Fore tarus black. Fore claws black; 1.2 times as long as fifth tarsomere. Pulvilli black. Mid femur black, mixed with whitish yellow and black hairs. Mid tibia black, with 1 ad, 2 p and 1 v, apically with 1 ad, 1 a, 1 av, 1 pv, 1 p, 1 v and 1 d. Hind femur black; hairs black; scale­like setae absent. Hind tibia black, with 11­13 pd and 7­ 8 ad.

ABDOMEN. Abdominal tergites with yellow spot or area (with a black median longitudinal vitta); pruinosity absent. Relative length of abdominal tergites I+II:III:IV: V = 1.4:1:1:1.2; relative width I+II:III:IV: V = 0.5:1:1:0.8. Hair spots of tergites IV, V indistinct. TERMINALIA. Syncercus broad, shallowly notched posteriorly; apex bent ventrally and hook­like. Surstylus straight, slender, slightly broadened apically, longer than cercus. Ejaculatory apodeme long, hook­like. Hypandrium as long as phallapodeme. Pregonite triangular, with a tooth ventrally. Epiphallus well developed. Postgonite slender, branched apically, haired ventrally. Phallus longer than hypandrium, dense hair dorsally. Dorsolateral process short, straight. Ventrolateral process long, strongly bent dorsally.

FEMALE. Body size smaller than male. Wing hyaline. Eyes separated by a distance 0.5 times as wide as ocellar triangle, not touching. Anterior spine­like setae of hind tibia present. Abdomen black, thinly grey pruinose. Sternite VII (sheath) longer than sternite VI, broad posteriorly; two posterior angles bent down into triangles; sternite VII with linear wrinkles ventrally. Ovipositor extremely long, almost straight.




The name Phasia japanensis   reflects the apparent restriction of this species to Japan.


Two specimens housed in the Institute of Zoology, Academic Sciences of Poland, Warsawa, labelled as " Alophora kagensis Takano   " are assigned as paratypes of Phasia japanensis Sun   , sp. nov.


Royal British Columbia Museum - Herbarium