Phyllomyza convexusa Xi & Yin 2018, sp. nov.
Creators: name: Xi, Yuqiang
name: Yin, Xinming
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Milichiidae
Phyllomyza
Phyllomyza convexusa

description: Phyllomyza convexusa sp. nov. (Figs 1–4)   
 Diagnosis. This new species is somewhat similar to P. dilatata Malloch, but differs from the gena approximately oneseventh of eye height; knob of halter brown yellow, stalk brown; cercus without ventral appendix. In P. dilatata, the gena approximately one-ninth of eye height; knob of halter yellowish white, stalk yellowish; cercus with longer ventral appendix, 1 seta on ventral appendix (Malloch, 1914b).   
Description. Male. Body length 1.7 mm; wing length 1.6 mm.  
Head (Fig. 1) black with grayish microtomentum. Orbital plate subshiny black with microtomentum, ocellar triangle blackish brown without microtomentum; lunule strap-shaped, darkish brown with black margin. Posterior eye margin ventrally diverging from head margin, eye 1.6 times as high as long, gena approximately one-seventh of eye height. Setae and setulae on head black; ocellar triangle with 2 long ocellar setae and 3 short setae; frons with 3 orbital and 2 frontal setae on black orbital stripe, orbital setae lateroclinate and frontal setae medioclinate, 4 interfrontal setae; postocellar setae cruciate. Lunule with 2 setae. Vibrissal angle relatively rectangular; vibrissa strong and located at level of lower eye margin. Antenna blackish brown with brownish microtomentum; pedicel with black setulae at middle and margin, setulae at margin longer than others, two longer setae, longest one about 2 times longer than the other one, about 3.5 times longer than the others; first flagellomere with pubescence, irregular sector; arista darkish brown, distinctly dense pubescence, 3.3 times as long as first flagellomere. Proboscis fold, darkish yellow at anterior 1/2, the rest part darkish brown, with sparse setulae. Palpus slightly rod-like with blunt apex in lateral view, about 0.3 mm, 3.5 times longer than wide; darkish brown with short dense brown pubescence, margin with sparse setulae.  
 Thorax darkish brown with grey microtomentum, except mesonotum shiny darkish brown; scutellum blackish brown with gray microtomentum. Setae and setulae on thorax black; 1 h, 2 dc, 1 prsc, 2 npl, 1prs, 1 pos, 1sa, 2 pa, 1 kepsts (a row setulae at forward position); scutellum 1.3 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 tibia darkish brown at posterior 2/3, tarsi yellowish. Setae and setulae on legs black. Mid tibia with 1 black preapical dorsal seta. Wing (Fig. 2) hyaline; veins brown; Sc strong; M 1 between r-m and dm-cu longer than dm-cu. Calypter yellowish, with dense brownish microtrichae, margin with brownish setulae. Knob of halter brown yellow.   
Abdomen yellowish brown with gray microtomentum. Setae and setulae on abdomen black; T2–T5 with setae at posterior 3/4, marginal setae longer than others; sternites with sparse black setulae. Posteromedial triangular projection of T1 into T2 strong; S2 generally horseshoe-shaped, S3 and S4 irregularly vertical rectangular; S5 generally saddle-shaped, 1.2 times wider than long. Male genitalia (Figs 3–4). Epandrium with 7 pairs of strong setae; surstylus tip slightly swollen and apical slightly blunt; cercus arched and with short sparse setae.  
Female. Unknown.  
Material examined. Holotype ♂, China, Yunnan, Baoshan, Baihualing (25˚17ʹN, 98˚48ʹE; elev. 1370 m), 12.V.2012, coll. Yuanye Liu. Paratypes. 2♂, same data as holotype; 3♂, China, Yunnan, Baoshan, Baihualing (25˚17ʹN, 98˚48ʹE; elev. 1372 m), 12.V.2012, coll. Wenliang Li. All deposited in HAU.  
Distribution. China (Yunnan).  
Etymology. The specific name refers to the apical abdomen of male swollen.
description: Published as part of Xi, Yuqiang & Yin, Xinming, 2018, Four new species of Phyllomyza Fallén (Diptera: Milichiidae), with an updated key from China, pp. 309-316 in Zoological Systematics 43 (3) on pages 311-312, DOI: 10.11865/zs.201824, http://zenodo.org/record/5365088