Phyllomyza euthyipalpis, Xi, Yuqiang & Yang, Ding, 2013

Xi, Yuqiang & Yang, Ding, 2013, Four new species of Phyllomyza Fallén from China (Diptera, Milichiidae), Zootaxa 3718 (6), pp. 575-582 : 581-582

Phyllomyza euthyipalpis sp. nov.

(Figs. Figs. 4 , 8 , 15, 16 )

Diagnosis. Palpus dark brown, straight, evenly elongate, almost as long as eye height. Surstylus with upper blade of bifurcated tip slightly swollen and lower one not swollen.

Description. Male. Body length 1.6 mm; wing length 1.6 mm.

Head black with grayish microtomentum; orbital plate subshiny black with microtomentum, ocellar triangle brownish without microtomentum; lunule strap-shaped, brownish black. Posterior eye margin ventrally diverging from head margin; eye 1.5 times as high as long, gena approximately one-seventh 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 brownish orbital stripe, orbital setae lateroclinate and frontal setae medioclinate, 4 interfrontal setae; postocellar setae converging. Lunule with 2 setae. Vibrissal angle relatively acute, vibrissa strong, located below level of lower eye margin. Antenna blackish brown with pubescence; pedicel with short black setulae at middle and margin, longest one about 4 times longer than others; first flagellomere with pubescence; arista 3 times as long as first flagellomere, black, distinctly pubescent. Proboscis short and with short sparse black setulae at margin. Palpus elongate, 7 times as long as wide, dark brown with short dense black setulae, margin with short sparse seta.

Thorax yellowish brown with grey microtomentum, except mesonotum shiny blackish brown with black microtomentum, scutellum dark brown with gray microtomentum. Setae and setulae on thorax black; 1 h, 2 dc, 1 prsc, 2 npl, 1prs, 1sa, 1 pa, 1 ia, 1 kepsts (a row 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 brownish, femora dark brown, tibiae yellow except hind tibia yellow to dark brown, tarsi yellowish. Setae and setulae on legs black, especially middle coxa with longer setae. Fore tibia with 1 black preapical dorsal seta. Wing hyaline, unspotted; veins brown; Sc strong; M1 between r-m and dm-cu as long as dm-cu. Calypter yellowish with brownish microtomentum, margin with brownish setulae. Knob of halter yellowish white.

Abdomen brownish with grey microtomentum. Setae and setulae on abdomen black; T2–T5 with setae at posterior 3/4, rowed marginal setae longer than others; sternites with sparse black setulae. Posteromedial triangular projection of T1 into T2 weak; S2 generally horseshoe-shaped, S3 and S4 generally subquadrate; S5 rectangular, 1.5 times longer than wide. Male genitalia: epandrium with 11 pairs of strong setae at middle; surstylus with upper blade of bifurcated tip slightly swollen and lower one not swollen; cerci arched with short sparse setae.

Female. Unknown.

Type material. HOLOTYPE ♂, CHINA, Yunnan, Yingjiang, Xima, 24°45′N 97°42′E, 2012. V.4, Wenliang Li. PARATYPES: 1 ♂, CHINA, Yunnan, Dali, Cangshan, 25°41′N 100°08′E, 2012. VI.4, Zehui Kang.

Distribution. China (Yunnan)

Etymology. The specific name refers to the palpus straight, elongate.

Remarks. This new species is distinctly different from other species of the genus in the palpus longer and straight, surstylus with the upper blade of the bifurcated tip slightly swollen and lower one not swollen, both blades almost with the same length.

Figures

FIGURES 1 – 4. Male head, lateral view. 1, Phyllomyza angustigenis sp. nov.; 2, Phyllomyza cuspigera sp. nov.; 3, Phyllomyza clavellata sp. nov.; 4, Phyllomyza euthyipalpis sp. nov.. Scale bars = 0.1 mm.

FIGURES 5 – 8. Wings (male). 5, Phyllomyza angustigenis sp. nov.; 6, Phyllomyza cuspigera sp. nov.; 7, Phyllomyza clavellata sp. nov.; 8, Phyllomyza euthyipalpis sp. nov.. Scale bars = 0.1 mm.

FIGURES 13 – 16. Male epandrium, cerci, and surstyli, posterior view and lateral view. 13, Phyllomyza clavellata sp. nov., posterior view; 14, Phyllomyza clavellata sp. nov., lateral view; 15, Phyllomyza euthyipalpis sp. nov., posterior view; 16, Phyllomyza euthyipalpis sp. nov., lateral view. Scale bars = 0.1 mm.