Phaonia nujiangensis Zhou & Wei, 2023

Zhou, Zhongyan & Wei, Lianmeng, 2023, Two new species of the Phaonia boleticola - group (Diptera, Muscidae, Phaoniinae) from China, ZooKeys 1168, pp. 219-229 : 219

Phaonia nujiangensis Zhou & Wei sp. nov.

Figs 6-10 , 15-17

Types.

Holotype. China: "Gaoligongshan, Nujiang River side, 580 m, Yunnan, 24°49 ’51.75” N, 98°46 ’12.00” E, 2.X.2011, LM Wei, TH Shou, Y Gu, P Jiang and WP Cao" (WLMWISAGC, 1 male). Paratype. China: Same data as holotype (WLMWI SAGC, 1 male).

Diagnosis.

Eye bare, frons black, somewhat narrower than the space between outer margin of two posterior ocelli; antenna brownish-yellow, gena black-red, grey pollinose, about 0.1 times eye height or narrower than width of postpedicel; dc 2+3, both anterior and posterior spiracles pale yellow, katepimeron bare; legs yellow, fore femur brownish-black, mid and hind femora each with apex somewhat darkened dorsally; tarsus black, somewhat brownish, mid tibia with 3 p, hind tibia with 2 av. Male terminalia: Viewed posteriorly: Cerci nearly completely fused in approximated portion. Apex of surstylus square-shaped and swollen. Viewed laterally: Cercus nearly hooked, the hind margin flexed at a right-angle. Surstylus strap-like, base strongly and apex slightly widened, apex bluntly rounded and hind margin curved posteriorly. St5 almost jar-shaped, apical angle of lateral lobe narrow, not curved inwards. Aedeagus with a small oval membranous area apically; acrophallus tail-shaped, membranous. Ejaculatory apodeme long, narrowly triangular.

Description.

Male. Black species. Thorax appearing dark red in ground-colour, thickly grey-brown pollinose. Wing brownish-yellow. Legs yellow, fore femur brownish-black, mid and hind femora somewhat darkish dorsally at apex; tarsus black, somewhat brownish. Abdomen elongate conical, reddish-brown, thinly grey-brown pollinose.

Head. Eye bare, anterior inner facets distinctly enlarged. Frons black, somewhat narrower than the space between outer margin of two posterior ocelli. Frontal vitta devoid of pruinosity, completely disappeared at narrowest point. Fronto-orbital plate densely silver-grey pollinose. Frontal setae 6 pairs, upper two as weak as setulae, distributed on more than anterior half. Lunule darkish red-brown, silver-grey pollinose. Antenna brownish-yellow, postpedicel dark brownish apically, scape and pedicel darkish red-brown; postpedicel about 2.4 times as long as pedicel and also about 2.4 times long as wide. Arista darkish brown, thickened basally, long plumose, the longest rays as long as width of postpedicel. Facial ridge and median area black, silver-grey pollinose, the former less than half as wide as antennal width. Face bright black, thinly grey pollinose; facial ridge black but bright black along upper margin along a narrow strip, which is also thinly grey pollinose. Lower facial margin not protruding in profile. Gena black-red, grey pollinose, about 0.1 times eye height or narrower than postpedicel width, its anterior margin with a row of upcurved setae. Palpus rod-like, brownish-black, longer than haustellum. Prementum stout, dark brown, thinly grey pollinose. Labellum developed, dark yellow. Occiput black, grey pollinose, with dark setae.

Thorax black, appearing dark red in ground-colour, thickly grey-brown pollinose. Viewed posteriorly, scutum with 4 longitudinal dark vittae, the inner pair obviously thin and stripe-like. Scutellum darkish red-brown, somewhat dark red in ground-colour, with hardly any pruinosity. Acr 0+1, as weak as setula. Dc 2+3. Pra short, about half as long as posterior notopleural seta. Anterior postpronotal seta developed, longer than postpronotal seta. Scutellum bare laterally and ventrally. Both anterior and posterior spiracles pale yellow. Katepisternal setae 1:2. Prosternum, notopleuron, meron and katepimeron bare.

Wing brownish-yellow, veins yellow to dark brown. Tegula blackish-brown, basicosta brown. Costal spine developed, obviously longer than cross-vein r-m. C setulose ventrally on 1st to 3rd sections and basal half of 4th sections. Radial node bare dorsally and ventrally. Cross-veins r-m and m-ms lightly clouded and the latter curved. Distal part of R4+5 and M straight, both somewhat diverging towards apex but parallel at apex. Calypters yellow, the lower one narrow, tongue-shaped, with distal margin round and inner margin separated from scutellar margin. Haltere yellow.

Legs yellow, fore femur brownish-black, mid and hind femora somewhat darkish dorsally at apex; tarsus black, somewhat brownish. Fore tibia with a median developed p. Mid femur with a row of short and dense a on basal half, with 3 spine-like av, very short, without pv; apically with 2 ad and 3 pd. Mid tibia with 3 p, developed. Hind femur with a row of developed ad, 2 av at apex, proximal one developed, apically with 2 d, 1 pd. Hind tibia with 2 av, proximal one developed, 1 strong pd (calcar) present at apical 1/4, without apical pv.

Abdomen elongate conical, reddish-brown, thinly grey-brown pollinose. Tg3-5 with a dark median vitta, that on Tg5 very narrow and blurred at edges. Tg5 dark red-brown apically. St1 bare. Male terminalia: Viewed posteriorly (Fig. 6 ): Cerci vest-like, nearly completely fused in approximated portion and obviously invaginated at apex, apical outer angle bluntly rounded; inner angle with an apical seta. Apex of surstylus square-shaped and swollen. Viewed laterally (Fig. 7 ): Cercus nearly hooked, the hind margin flexed at a right-angle. Surstylus strap-like, moderately elongated, base strongly and apex slightly widened, apex bluntly rounded and hind margin curved posteriorly. St5 (Fig. 8 ) almost jar-shaped, apical angle of lateral lobe narrow, not curved inwards. Hypandrium (Fig. 10 ) meniscate, with deep median incision posteriorly. Genital tergite (Fig. 9 ): Pregonite slender, flexed from the middle, basal half curved cone-like, apical half strap-shaped, rounded apically. A pair of asymmetric postgonites, rather developed; the left one apparently smaller than the right one, base trapezoid and end curved, with 3 ventral setae medially; the right one wide strap-shaped, straight, rounded apically, with 4 ventral setae near the middle and 2 median setae. Distiphallus elongated, the base strap-shaped, well sclerotized, with a small oval membranous area apically. Acrophallus tail-shaped, membranous. Aedeagal apodeme slender, sclerotized apex expanded like a fan and wrapped round with a membranous plate. Epiphallus developed, rod-shaped, with apex expanded like a fan. Ejaculatory apodeme (as in Fig. 9 ) long, narrowly triangular.

Female. Unknown.

Measurements.

Male. Body length 4.9-5.0 mm.

Etymology.

The specific name refers to the type locality.

Distribution.

China, Yunnan (Nujiang River margin, Gaoligongshan).

Remarks.

The new species resembles P. hainanensis Xue et al., but this species differs from the new species by the yellow antenna; cerci narrower, with distal outer angle acute; surstylus elongated, with apex narrow; St5 with apical angle of lateral lobe not curved inwards. Furthermore, the new species is similar to P. agitata sp. nov. but can be separated from the latter by the following characters: frons somewhat narrower than the space between outer margin of two posterior ocelli; katepimeron bare; both anterior and posterior spiracles pale yellow; legs yellow, fore femur brownish-black; and male terminalia has different morphological characteristics from that of P. hainanensis .

Figures

Figures 6 - 10. Phaonia nujiangensis Zhou & Wei, sp. nov. 6, 7 cercus in posterior and lateral views 8 sternite 5 in ventral view 9 terminalia, lateral view 10 hypandrium, lateral view. Scale bar: 0.1 mm.

Figures 11 - 17. Phaonia agitata Zhou & Wei, sp. nov. (♂) (11 - 14) Phaonia nujiangensis Zhou & Wei, sp. nov. (♂) (15 - 17) 11, 16 habitus in lateral view 13 head in lateral view 14, 15 head in anterior view 12, 17 thorax and wing in dorsal view. Scale bar: 0.2 mm.