Phaonia agitata 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 agitata Zhou & Wei sp. nov.

Figs 1-5 , 11-14

Types.

Holotype. China: "Guizhou, Fanjing Mountain, 1800 m, 27°55'N, 108°41'E, 22.VI.1994, LM Wei", (WLMWISAGC, 1 male). Paratypes. Same data as holotype (WLMWISAGC, 2 males).

Diagnosis.

Eye bare, antenna brownish-yellow; dc 2+3, katepimeron setulose, both anterior and posterior spiracles brown; legs dark brown, with apex of femora and trochanters brown, tibiae yellow-brown and tarsus black, somewhat brownish, mid tibia with 2 p, hind tibia with 3 av; male terminalia: in posterior view, cerci with distal outer angle dully rounded; in profile, surstylus short, with apex widened; st5 (Fig. 3 ) oval, apical angle of lateral lobe pointed and curved inwards. Aedeagus with acrophallus triangular, membranous. Ejaculatory apodeme diamond-shaped.

Description.

Male. Bright black species, thorax grey-brown pollinose, scutellum dark. Viewed posteriorly, scutum with 4 longitudinal dark vittae. Wing darkish brown. Legs dark brown, femoral tips and trochanters brown, tibiae yellow-brown and tarsus black, somewhat brownish.

Head with eye bare, anterior inner facets distinctly enlarged. Frons somewhat wider than the space between outer margin of two posterior ocelli. Frontal vitta black, devoid of pruinosity, about as wide as facial ridge. Fronto-orbital plate dark, densely silver-grey pollinose. Frontal setae 5 pairs, mixed with individual setulae, uppermost one as weak as setulae, the distance from this to anterior ocellus about 1.5 times the space between outer margin of two posterior ocelli. Lunule darkish tawny-yellowish, silver-grey pollinose. Antenna brownish-yellow, postpedicel brownish apically, scape and pedicel brown; postpedicel about 2.3 times as long as pedicel or about 3.3 times as long as wide. Arista brownish-yellow, thickened basally, with long plumosity, the longest rays about as long as width of postpedicel. Face and facial ridge mainly black, more or less yellowish, brown-grey pollinose. Lower facial margin not protruding in profile. Genal groove dark red dark, almost without pruinosity. Gena black, brown-grey pollinose, about 0.18 times of eye height or equal to 1.5 times width of postpedicel, its anterior margin with a row of upcurved setae. Palpus rod-like, black, longer than haustellum. Prementum stout, brown, thinly grey pollinose. Labellum developed, dark red. Occiput black, grey pollinose, with dark setae.

Thorax. Acr 0+1. Dc 2+3. Pra short, at most as long as posterior notopleural seta. Anterior postpronotal seta developed, longer than postpronotal seta. Scutellum bare laterally and ventrally. Anterior and posterior spiracles brown. Katepisternal setae 1:2. Katepimeron setulose. Prosternum, notopleuron and meron bare.

Wing with veins brown to dark brown. Tegula and basicosta black. Costal spine undeveloped, clearly shorter than cross-vein r-m. C setulose ventrally, but 5th section bare. Radial node bare dorsally and ventrally. Cross-veins r-m and m-m without much clouding and the latter curved. Distal part of R4+5 curved up and M straight and both of them gradually diverging towards apex. Calypters yellow, lower one narrow, tongue-shaped, with distal margin round, inner margin separated from scutellar margin. Haltere reddish-yellow.

Legs. Fore tibia with a median p. Mid femur with a row of short and dense a on basal half, a row of setula-like av and pv, without ad; apically with 2 ad and 3 pd. Mid tibia with 2 p. Hind femur with a row of developed ad, 6 av at apex and a row of setulae-like pv; apically with 2 ad, 1-2 pd and 1 p. Hind tibia with 3 av, proximal one developed, 1 strong pd (calcar) present at apical 1/4, without apical pv.

Abdomen oval, of the same colour as thorax. Tg1+2 with a dark tongue-shaped median patch. Tg3 with long and narrow dark cone-shaped median vitta. Tg4 and 5 each with a very narrow median vitta. Tg6 bare, dark brown. St1 bare. Male terminalia: Viewed posteriorly (Fig. 1 ): Cerci vest-like, fused on upper half of approximated portion and clearly invaginated at apex, distal outer angle bluntly rounded, inner angle with an apical seta. Surstylus spherical swollen apically. Viewed laterally (Fig. 2 ): Cercus inwardly curved conically. Surstylus strip-like, not elongated, narrow medially, with apex arched. St5 (Fig. 3 ) oval, apical angle of lateral lobe pointed and curved inwardly. Hypandrium (Fig. 5 ) spoon-shaped, its ventral margin deep incurvate, curved basoposteriorly. Genital tergite (Fig. 4 ) with pregonite slender, slightly curved, rounded apically. A pair of asymmetric postgonites, rather developed, the left one rounded apically, apparently smaller than the right one; the right postgonite hooked, pointed apically. Distiphallus elongated, the base infundibular, well sclerotized, widened toward apex. Acrophallus triangular, membranous. Aedeagal apodeme slender, bifurcate basally. Epiphallus developed strap-like, with apex expanded globe-like. Ejaculatory apodeme (as in Fig. 4 ) diamond-shaped with a sclerotized band medially and a papillary bulge on the surface.

Female. Unknown.

Measurements.

Male. Body length 6.9-7.0 mm.

Etymology.

The Latin agitatus means “agitated”, which refers to the excitement that the authors experienced when involved in fieldwork activity.

Distribution.

China (Fanjing Mountain, Guizhou).

Remarks.

The new species resembles P. hainanensis Xue et al. and these two species belong to the P. boleticola -group because they share the following characters: legs partly yellow, dc 2+3, meron bare, abdomen with a black median vitta and without a shining patch. It can be separated from the latter by the following combination of features: frons somewhat narrower than 2.5 times anterior ocellus, antenna brownish-yellow; male terminalia: in posterior view, cercus is wider, with distal outer angle dully rounded; in profile, surstylus short, with apex widened; st5 with apical angle of lateral lobe never expanded outwards when viewed ventrally. In P. hainanensis , the antenna is yellow; the cercus is narrower, with the distal outer angle acute; surstylus elongated, with apex narrow; st5 with apical outer angle strongly expanded outwards.

This new species is also similar to P. nujiangensis sp. nov. but can be separated from the latter as follows: Frons somewhat wider than the space between outer margins of posterior ocelli; katepimeron setulose; both anterior and posterior spiracles brown; legs dark brown, tibiae yellow-brown; mid tibia with 2 p, hind tibia with 3 av. Male terminalia: Cercus as long as wide. Surstylus spherical, swollen apically, shorter in profile. St5 (Fig. 3 ) oval, apical angle of lateral lobe curved inwards. Aedeagus with acrophallus triangular, membranous (Fig. 4 ).

Figures

Figures 1 - 5. Phaonia agitata Zhou & Wei, sp. nov. 1, 2 cercus in posterior and lateral views 3 sternite 5 in ventral view 4 terminalia, lateral view 5 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.