Phaonia oxystoma Emden 1965
Creators: name: Xue, W.
name: Q., Zhao
name: D, D.
name: Wang, M.
name: R, P.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Muscidae
Phaonia
Phaonia oxystoma

description: DIAGNOSIS OF PHAONIA OXYSTOMA -GROUPAND DISTRIBUTION
Mid tibia with a row of medium p; scutellum black, not tinged with yellow; Pre acr well developed; post dc 3; lower facial margin projecting in profile; legs largely yellow.
The species of Phaonia oxystoma -group are mainly distributed in Qingzang Plateau (Tibet) and its marginal areas, for instance Sichuan province (Dayi: Xiling, Maowen county: Sanlong, Yingjing, Ya’an: Mt. Erlang, Hanyuan: Mt. Jiaoding, Mt. Emei, Luding: Yanzigou), Tibet (Medog: Galongla, Mt. Duoxiongla), Yunnan province (Lushui: Pianma).
KEY TO THE SPECIES OF PHAONIA OXYSTOMA -GROUP FROM CHINA (MALES)
1 Basicosta brownish or black 2
– Basicosta yellow 6
2 Mid and hind femora without pv; legs yellow, only black on apical femora and basal tibiae as well as tarsi; cerci with one pair of long setae on preapical part, the distal surstyli with 2–3 thorn-shaped setae P. buplicispina DENG et MA, 2002
– Mid and hind femora with pv 3
3 Notopleuron haired 4
– Notopleuron bare 5
4 Fore tibia without p; mid femur without av; parafacial about 2/3 of 1st flagellomere in width; calypteres white, halteres dark reddish-brown P. helvitibia FENG, 2002
– Fore tibia with p; mid femur with av; parafacial wider than 1st flagellomere obviously; calypteres yellow, halteres brownish-yellow P. setisternita MA et DENG, 2002
5 Frons wider than anterior ocellus slightly; trochanters dark brown; palpi black, longer than prementum obviously; spiracles dark brown; surstyli strong and short P. fuscibasicosta MA et DENG, 2002
– Frons 2.0 times as wide as anterior ocellus; trochanters yellowish-brown; palpi dark brown, equal to prementum in length; spiracles dark reddishbrown; surstyli slender P. subfuscibasicosta MA et DENG, 2002
6 Hind tibia with av 1 7
– Hind tibia with av 2 16
7 Antenna with arista pubescent, the longest hair longer than its diameter; parafacial rather wide, 1.5 times of 1st flagellomere in width; palpi black, short extremely P. brevipalpata FANG et FAN, 1988
– Antennae with arista short plumose or plumose; parafacial at most equal to 1st flagellomere in width 8
8 Frons rather narrow, at least equal to anterior ocellus in width 9
– Frons rather wide, slightly less than or equal to the distance between posterior ocelli in width 14
9 Parafacial narrow, subequal to 1/2 of 1st flagellomere in width 10
– Parafacial rather wide, slightly less than or equal to 1st flagellomere in width 11
10 Frontal setae 3; prementum short, 2.5 times as long as wide; genal height 1/6 of eye height; palpi black; cerci slender in profile, which inner lobe subequal to outer lobe in length in posterior view P. axinoides FENG, 1995
– Frontal setae 5–6; prementum long, 4.0 times as long as wide; genal height 1/3 of eye height; palpi dark brown; cerci rather wide in profile, which inner lobe longer than outer lobe obviously in length in posterior view P. dayiensis MA et DENG, 2002
11 Hind femur without pv; calypteres brownish-yellow; anterior spiracle yellowish-brown, posterior one brown P. hanyuanensis FENG et MA, 2002
– Hind femur with pv 12
12 Tergites 3 and 4 with wide posterior marginal straps; palpi dark brown, which apex become wider; the width of lateral lobe of sternite 5 equal to its length; antennae black; frons equal to anterior ocellus in width P. latilamella FENG et MA, 2002
– Tergites 3 and 4 without posterior marginal straps 13
13 Eyes bare, the upper and medium parts of ommatibia not expanded; palpi black; spiracles dark brown; cerci with distinct outer lobe; the length of sternite 5 longer than its width distinctly P. sublatilamella XUE et ZHAO sp. n.
– Eyes covered with short and sparse ciliated, the upper part of ommatibia extremely large, which 2.0 times or more than the lower ones; palpi yellowish-brown on basal half, black on apical half; anterior spiracle reddish-brown, posterior one coffee; cerci without outer lobe; the width of sternite 5 longer than its length distinctly P. subalpicoloida MA et DENG, 2002
14 Fore femur dark black in dorsal part; hind tibia with 2–3 av; parafacial slightly less than or equal to 1st flagellomere in width; mid femur with a av row P. subalpicoloida MA et DENG, 2002
– Fore femur yellow or yellowish-brown entirely 15
15 Tergites of abdomen with versicolor marginal straps; arista of antennae short plumose, the longest hair subequal to 1/2 of 1st flagellomere in width; parafacial subequal to 1st flagellomere width; anterior spiracle yellow, posterior one brownish; coxae yellow; the inner lobe of cerci shorter or equal to outer lobe in length in posterior view P. deformicauda XUE et LI, 2001
– Tergites of abdomen without versicolor marginal straps; arista of antennae plumose, the longest hair slightly less than 1st flagellomere in width; parafacial subequal to 1/2 of 1st flagellomere width; spiracles dark brown; coxae dark brown; the inner lobe of cerci longer than outer lobe distinctly in length in posterior view P. subalpicola XUE, 1998
16 Frons at most wider than the anterior ocellus slightly 17
– Frons wider than 2.0 times of the anterior ocellus width distinctly 21
17 Hind femur without pv 18
– Hind femur with pv 19
18 Parafacial about 1/2 of 1st flagellomere in width; frons about 1/2 of the anterior ocellus in width; the inner lobe of cerci longer than outer lobe in length in posterior view P. hebeta FANG et FAN, 1987
– Parafacial subequal to 1st flagellomere width; frons slightly wider or equal to the anterior ocellus in width; the inner lobe of cerci equal to or shorter than outer lobe in length in posterior view P. hebetoida MA et DENG, 2002
19 Arista of antennae plumose, the longest hair slightly less than 1st flagellomere in width; frons subequal to 1.5 times of the anterior ocellus; parafacial about 1/3 of 1st flagellomere in width; the inner lobe of cerci longer than outer lobe in length in posterior view P. subfuscitrochenter MA et DENG, 2002
– Arista of antennae short plumose, the longest hair subequal to 1/2 of 1st flagellomere in width 20
20 Palpi black; frons subequal to 1.5 times as wide as anterior ocellus; frons subequal to 1.5 times as wide as anterior ocellus; parafacial subequal to 1.5 times as wide as 1st flagellomere; anterior spiracle yellow, posterior one brown; calypteres brownish; halteres yellow P. bacillirostris XUE et WANG, sp. n.
– Palpi yellowish-brown, dark brown on apical half; frons slightly narrower than anterior ocellus in width; parafacial subequal to 1st flagellomere in width; anterior spiracle reddish-brown, posterior one dark brown; calypteres and the apical halteres yellowish P. parahebeta MA et DENG, 2002
21 Palpi with brown color; genal height about 1/5 of eye height; coxae and trochanters brownish-black or dark brown; cerci with distinct outer lobe P. fuscitrochanter MA et DENG, 2002
– Palpi black at apex; genal height subequal to 1/3 of eye height; coxae and trochanters brownish-yellow; cerci without outer lobe P. amica MA et DENG, 2002
description: Published as part of Xue, W., Q., Zhao, D, D., Wang, M. & R, P., 2009, Phaonia Oxystoma-Group (Diptera, Muscidae): Diagnosis, Key To Identification, Description Of Two New Species And Synonymic Notes, pp. 1-10 in Acta Zoologica Academiae Scientiarum Hungaricae 55 (1) on pages 2-5, DOI: 10.5281/zenodo.5731898