Phyllomyza hirtipes, Xi & Zhu & Liu & Yang & Yin, 2023

Xi, Yuqiang, Zhu, Yongqiang, Liu, Chang, Yang, Ding & Yin, Xinming, 2023, Three new species of Phyllomyza Fallén (Diptera: Milichiidae) from Yintiaoling National Nature Reserve of Chongqing, with an updated key from China, Zootaxa 5257 (1), pp. 115-122 : 118-119

Phyllomyza hirtipes sp. nov.

( Figs 3, 4 , 9, 10 )

Diagnosis. Gena approximately one-ninth of eye height. Surstylus with upper blade of bifurcated tip extremely swollen and apical margin flat, the lower blade thin and with sharp tip.

Description. Male. Body length 1.3–1.5 mm; wing length 1.3–1.5 mm.

Head brown with greyish microtomentum; orbital plate brown, with microtomentum, ocellar triangle brownish without microtomentum; lunule strap-shaped, darkish brown with black margin. Posterior eye margin ventrally diverging from head margin; eye 1.5 times as high as long, gena approximately one-ninth of eye height. Setae and setulae on head black; ocellar triangle with 2 ocellar setae and 3 short setae; frons with 3 orbital and 2 frontal setae on darkish brown orbital stripe, orbital setae lateroclinate and frontal setae medioclinate, 4 interfrontal setae; postocellar setae cruciate. Lunule with 2 setae. Vibrissal angle relatively flat; vibrissa strong, located below level of lower eye margin. Antenna darkish brown with microtomentum; pedicel with black setulae at middle and margin, setulae at margin longer than others, the longest one about 3 times longer than others; first flagellomere with pubescence, irregularly circular; arista 3 times as long as first flagellomere, brown, distinctly pubescent. Proboscis short, brown, with sparse black setulae. Palpus short with blunt apex, anterior 1/3 narrowed in lateral view, about 0.2 mm; darkish brown with short dense brown pubescence, margin with short sparse setae.

Thorax darkish brown with grey microtomentum, except mesonotum shiny brown with sparse black microtomentum; scutellum darkish brown with grey microtomentum. Setae and setulae on thorax black; 1 h, 2 dc, 1 prsc, 2 npl, 1 prs, 1 pos, 1 sa, 2 pa, 1 ia, 1 kepsts (a row of setulae at forward position); scutellum 1.5 times wider than long, with pair of asc and bsc, asc 3 times longer than bsc. Legs slender, coxae and femora darkish brown, tibiae yellow except hind tibiae darkish brown at posterior 2/3, tarsi yellowish. Setae and setulae on legs black. Mid tibia with 1 black preapical dorsal seta. Wing hyaline; veins brown; M 1 between r-m and dm-cu as long as dm-cu. Calypter yellowish, with dense brownish microtrichae, margin with black setulae. Knob of halter darkish brown, stalk brownish.

Abdomen brown with grey microtomentum. Setae and setulae on abdomen black; T2–T5 with long setae at posterior margin; sternites with sparse setulae. Posteromedial triangular projection of T1 into T2 strong; S2 generally horseshoe-shaped, apical margin blunt, S3 vertically rectangular, S4 and S5 horizontally trapezoid, S5 shorter than S4, only half as long as S4. Male genitalia: epandrium with 7 strong black setae; surstylus with upper blade of bifurcated tip extremely swollen and apical margin flat, the lower blade thin and with sharp tip; cercus arched with a little longer ventral appendix, with short sparse setae.

Female. Unknown.

Type material. HOLOTYPE male, CHINA, Chongqing, Yintiaoling Nature Reserve, Huangcaoping , 2168 m, 31°25′N 109°55′E, 2022. VI. 30, Yuliang Guan & Rongzhen Xu. PARATYPES: 2 males, same data as holotype.

Distribution. China (Chongqing)

Etymology. The specific epithet refers to the epandrium with strong setae.

Remarks. This species is similar to P. motuoensis Xi, Yang et Yin , but can be separated by the 4 interfrontal setae; the vibrissa located below level of lower eye margin; the M 1 between r-m and dm-cu as long as dm-cu. In P. motuoensis , the number of interfrontal setae are three; the vibrissa is located at the level of lower eye margin; M 1 between r-m and dm-cu longer than dm-cu ( Xi, Yang & Yin 2019).

Figures

FIGURES 1–6. Head (male, lateral view) and wing (male). 1–2, Phyllomyza fuscusagenis sp. nov.; 3–4, Phyllomyza hirtipes sp. nov.; 5–6, Phyllomyza obtusus sp. nov. Scale bars = 0.1 mm.

FIGURES 7–12. Male epandrium, cercus, and surstylus, posterior view and lateral view. 7, Phyllomyza fuscusagenis sp. nov., posterior view; 8, Phyllomyza fuscusagenis sp. nov., lateral view; 9, Phyllomyza hirtipes sp. nov., posterior view; 10, Phyllomyza hirtipes sp. nov., lateral view; 11, Phyllomyza obtusus sp. nov., posterior view; 12, Phyllomyza obtusus sp. nov., lateral view. Scale bars = 0.1 mm.