Apotropina bistriata Liu & Yang, 2015, sp. n.
Creators: name: Liu, Xiaoyan
name: Yang, Ding
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chloropidae
Apotropina
Apotropina bistriata

description: Apotropina bistriata sp. n.
Figs 1, 4–7
Diagnosis. Scutum yellowish brown with 2 brown longitudinal stripes, which extend to scutoscutellar suture. Legs yellow except for mid and hind coxae, distal portions of femora, distal portion of fore tibia and tarsomere 5 yellowish brown. R4+5 and M1+2 parallel distally. Cercus incised on ventral margin, the depth 1/3 of its height. Postgonite with a small incision on ventral 1/3 of distal end.
Description. Male. Body length 2.2 mm, wing length 2.1 mm.
Head brown with gray microtomentum, 0.85 times as long as high; face yellow, somewhat concave in lateral view, facial carina indistinct; frons brown except for anterior 1/3 yellow, 0.9 times as long as wide, projecting only slightly in front of eye; gena yellow, broad, 0.5 times as wide as first flagellomere; parafacial indistinct. Ocellar triangle brown, extending to 0.6 of frons, with a pointed anterior apex; ocellar tubercle light brown. Occiput and postgena brown. Clypeus light brown. Cephalic setae and setulae black. Antenna yellow with thick grayish microtomentum except for dorsal margin of first flagellomere brown; first flagellomere as wide as long; arista yellow except for basal segment brown, with short brown setulae. Proboscis bright brown to yellow with yellow setulae; palpus yellow with black setulae.
Thorax yellowish brown with gray microtomentum. Scutum as long as wide, with 2 brown longitudinal stripes, which extend to scutoscutellar suture. Thoracic pleuron shiny yellowish brown without microtomentum except for ventral 2/3 of katepisternum and posteroventral portion of katepimeron blackish brown. Scutellum brown, 0.6 times as long as wide; ap sc developed, 2.7 times as long as scutellum; sap sc 1.5 times as long as scutellum. Setae and setulae on thorax black, developed; npl 1+1, a npl developed, p npl hair-like, 2/3 times as long as a npl; a pa developed, p pa hair-like, subequal to a pa; 1 presutural dc and 3 postsutural dc, the posterior one longer than others; katepisternum with an upcurved long seta. Legs yellow except for mid and hind coxae, distal portions of femora, distal portion of fore tibia and tarsomere 5 yellowish brown. Setulae on legs black. Mid tibia with a distinct black apical spur, which is longer than diameter of tibia; hind tibia with a short black apical spur, which is shorter than diameter of tibia. Tibial organ oblong, narrow. Wing 2.5 times as long as wide, hyaline; veins brown. Relative lengths of 2nd: 3rd: 4th costal sections = 3.3: 2: 1; r-m at basal 0.6 of discal cell; R4+5 and M1+2 parallel distally. Halter pale yellow.
Abdomen yellowish brown with gray microtomentum except for tergite 1 yellow, distal portions of tergites 2– 5 brown; venter yellow. Setulae on abdomen black.
Male genitalia (Figs. 4–7): Epandrium brown with ventrodistal corner slightly prolonged; surstylus acute apically. Cercus weakly convex on dorsal margin, incised on ventral margin, the depth 1/3 of its height. Postgonite longer than pregonite, postgonite gradually narrowed basally, with a small incision on ventral 1/3 of distal end; distiphallus longer than basiphallus in lateral view; phallapodeme long with basal stalk broad in lateral view. Hypandrium narrowed.
Female. Unknown.
Type material. Holotype ♂, CHINA: Guangdong: Zengcheng, Nankun Mountain, 710 m, 14. VII. 2003, Coll. Shuwen An.
Distribution. China (Guangdong).
Remarks. The new species is somewhat similar to A. fuscipleuris (Becker), but can be separated from the latter by the following features: proboscis bright brown to yellow; scutum yellowish brown with 2 brown longitudinal stripes, which extend to scutoscutellar suture; legs yellow except for mid and hind coxae, distal portions of femora, distal portion of fore tibia and tarsomere 5 yellowish brown. In A. fuscipleuris, the proboscis is shiny black; the scutum is entirely rusty brown; the legs are reddish yellow except for tarsi black (Becker 1911).
Etymology. The specific name is from the Latin bi- (“two”) and striatus (“stripe”), referring to the scutum with 2 brown longitudinal stripes.
description: Published as part of Liu, Xiaoyan & Yang, Ding, 2015, Three new species of genus Apotropina Hendel from China (Diptera, Chloropidae), pp. 122-130 in Zootaxa 3947 (1) on pages 123-126, DOI: 10.11646/zootaxa.3947.1.8, http://zenodo.org/record/231675