Homoneura (Homoneura) wuxica, You & Chen & Li, 2023

You, Pengyan, Chen, Xulong & Li, Wenliang, 2023, Four new species of the subgenus Homoneura from Yintiaoling Nature Reserve China (Diptera: Lauxaniidae: Homoneura), Zootaxa 5257 (1), pp. 143-159 : 153

Homoneura (Homoneura) wuxica sp. nov. ( Figs 21–30 )

Diagnosis. Basal margin of brown apical spot on R 2+3 at same vertical level of crossvein dm-cu. Surstylus hairy and extended from interior of epandrium, finger-like in lateral view. Hypandrium Y-shaped. Pregonite short, postgonite coniform. Phallus narrow in ventral view, with a tiny submedial teeth-like process in lateral view.

Description. MALE. Body length 7.4–7.7mm, wing length 7.3–7.6mm. FEMALE. Body length 7.4–7.8mm, wing length 7.2–7.6mm.

Head ( Fig. 21 ) yellow. Frons as long as wide and parallel-sided, with a pair of pale brown stripes extending to sides of ocellar triangle; ocellar triangle brown, ocellar seta developed. Gena about 1/9 height of eye. Antenna yellow, first flagellomere about 1.9 times longer than high; arista black except yellow at base, long plumose, with longest ray as long as height of first flagellomere. Proboscis yellow, with pale yellow and black setulae; palpus yellow, with black setulae.

Thorax ( Fig. 24 ) yellow, with gray pruinosity. 0+3 dorsocentral setae, anteriormost postsutural dorsocentral seta far from scutal suture, acrostichal setulae in irregular six rows. Legs pale yellow. Fore femur with seven posterior dorsal setae, five posterior ventral setae and ctenidium with 16 short setae; fore tibia with one dorsal preapical seta and one apical ventral seta. Mid femur with six anterior setae and one apical posterior seta; mid tibia with one strong dorsal preapical seta and three strong apical ventral setae. Hind femur with one preapical anterior dorsal seta; hind tibia with one dorsal preapical seta and one short apical ventral seta. Wing ( Fig. 22 ) slightly yellow, basal margin of brown apical spot on R 2+3 at same vertical level of crossvein dm-cu; brown apical spots on R 2+3, R 4+5 and M 1 slightly confluent and forming pale brown connecting area between apical spots on R 2+3, R 4+5 and M 1; brown median spot on R 4+5 separated from brown cloud-like spot on crossvein dm-cu; subcostal cell brown apically; costa with 2nd (between R 1 and R 2+3), 3rd (between R 2+3 and R 4+5), and 4th (between R 4+5 and M 1) sections in proportion of 3.7mm: 1.1mm: 0.9mm; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 2.2mm: 2.0mm; ultimate section of CuA

1 about 1/7 of penultimate. Haltere yellow.

Abdomen ( Fig. 25 ) brown. Male genitalia ( Figs. 26–30 ): syntergosternite circular. Epandrium broad in lateral view; surstylus hairy and extended from interior of epandrium, finger-like in lateral view. Hypandrium H-shaped. Pregonite short, postgonite coniform. Phallus narrow in ventral view, with a tiny submedial teeth-like process in lateral view. Phallapodeme longer than phallus.

Type material. Holotype male, China, Chongqing: Wuxi County, Yintiaoling Nature Reserve, Linkouzi Management and Protection Station to Guimenguan , 31°28′36″N, 109°53′19″E, elev. 1349 m, 2022. VIII. 11, leg. Xulong Chen. Paratypes: 56 males and 1 female, same data as holotype ; 10 males and 11 females, Yintiaoling, Zhuanping , 31°28′30″N, 109°52′41″E, elev. 1456m, 2022. VI. 28, leg. Xulong Chen ; 10 males, Yintiaoling, Linkouzi Management and Protection Station , 31°28′27″N, 109°52′55″E, elev. 1294 m, 2022. VI. 29, leg. Xulong Chen.

Etymology. The specific epithet is named for the type locality, Wuxi County.

Distribution. China (Chongqing)

Remarks. The new species is very similar to H. (H.) dagupingensis Gao & Shi, 2019 from Shaanxi of China, but it can be separated from the latter by the arista with longest ray as long as height of first flagellomere; ctenidium with 16 short setae on fore femur; surstylus with a long digitiform process in lateral view and without subapical concavity. In H. (H.) dagupingensis , the arista with longest ray slightly shorter than 1/2 height of first flagellomere; ctenidium with 12 short setae on fore femur; surstylus with a small triangluar process with several setulae in lateral view.

The new species is somewhat similar to H. (H.) yintiaolingica sp. nov. described below, but it can be separated by the fore femur with seven posterior dorsal setae; mid femur with six anterior setae; brown median spot on R 4+5 separated from brown cloud-like spot on crossvein dm-cu. In H. (H.) yintiaolingica , the fore femur with five posterior dorsal setae; mid femur with four anterior setae; brown median spot on R 4+5 slightly fused with brown cloud-like spot on crossvein dm-cu.

Figures

FIGURES 21–25. Homoneura (Homoneura) wuxica sp. nov. Male. 21. head, anterior view; 22. wing; 23. habitus, lateral view; 24. thorax, dorsal view; 25. abdomen, dorsal view.

FIGURES 26–30. Homoneura (Homoneura) wuxica sp. nov. Male. 26. syntergosternite and epandrium, lateral view; 27. epandrial complex, posterior view; 28. syntergosternite, anterior view; 29. aedeagal complex, ventral view; 30. aedeagal complex, lateral view. Scale 0.5 mm.