Homoneura (Homoneura) yintiaolingica, 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 : 156

Homoneura (Homoneura) yintiaolingica sp. nov. ( Figs 31–40 )

Diagnosis. Mesonotum with acrostichal setulae in irregular six rows. Wing with brown median spot on R 4+5 slightly fused with brown cloud-like spot on crossvein dm-cu. Surstylus hairy and finger-like in lateral view, blunt apically in posterior view. Pregonite coniform, postgonite furcated into two coniform processes in lateral view. Phallus curved backward and acute apically in lateral view, with a pair of triangular submedial processes in ventral view.

Description. MALE. Body length 6.0– 6.3mm, wing length 6.0– 6.7mm. FEMALE. Body length 7.0– 7.5mm, wing length 7.3–7.8mm.

Head ( Fig. 31 ) yellow. Frons as long as wide and parallel-sided, with a pair of pale brown stripes extending to ocellar triangle; ocellar triangle yellow, ocellar seta developed, longer than anterior fronto-orbital seta, anterior fronto-orbital seta shorter than posterior fronto-orbital seta. Gena about 1/9 height of eye. Antenna yellow, first flagellomere about 1.9 times longer than high; arista black except brown at base, 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. 34 ) 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 five posterior dorsal setae, four posterior ventral setae and ctenidium with 16 short setae; fore tibia with one dorsal preapical seta and one apical ventral seta. Mid femur with four 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. 32 ) slightly yellow, basal margin of brown apical spot on R 2+3 behind 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 slightly fused with 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 3.2mm: 1.0mm: 0.8mm; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 2.0mm: 1.8mm; ultimate section of CuA

1 about 1/6 of penultimate. Haltere yellow.

Abdomen ( Fig. 35 ) yellow, tergites 2–5 posterior margin blackish brown. Male genitalia ( Figs. 36–40 ): syntergosternite circular. Epandrium broad in lateral view. Surstylus hairy and finger-like in lateral view, blunt apically in posterior view. Hypandrium H-shaped. Pregonite coniform, postgonite furcated into two coniform processes in lateral view. Phallus curved backward and acute apically in lateral view, with a pair of triangular submedial processes in ventral view. Phallapodeme longer than phallus.

Type material. Holotype male, China, Chongqing: Wuxi County, Yintiaoling Nature Reserve, Hongqi Management and Protection Station , 31°30′50″N, 109°49′22″E, elev. 1220 m, 2022. VIII. 20, leg. Xulong Chen. Paratypes: 15 males and 2 females, Yintiaoling, Linkouzi Management and Protection Station to Guimenguan , 31°28′36″N, 109°53′19″E, elev. 1349 m, 2022. VIII. 11, leg. Xulong Chen ; 2 males and 1 female, Yintiaoling, Ganheba , 31°31′25″N, 109°49′32″E, elev. 1258 m, 2022. VI. 25, leg. Xulong Chen ; 1 male and 2 females, Yintiaoling, Hongqi Management and Protection Station , Daqiaowan , 31°29′36″N, 109°49′0″E, elev. 1079m, 2022. VIII. 20, leg. Xulong Chen.

Etymology. The specific epithet is named for the type locality, Yintiaoling Nature Reserve.

Distribution. China (Chongqing)

Remarks. The new species is very similar to H. (H.) dagupingensis Gao et Shi, 2019 from Shaanxi of China, but it can be separated from the latter by ctenidium with 16 short setae on fore femur; wing with brown apical spots on R 2+3, R 4+5 and M 1 slightly confluent and forming pale brown connecting area between apical spots; brown median spot on R 4+5 slightly fused with brown cloud-like spot on crossvein dm-cu. In H. (H.) dagupingensis , ctenidium with 12 short setae on fore femur; wing with brown apical spot on R 2+3 separated from that on R 4+5; brown medial spot on R 4+5 separated from brown cloud on crossvein dm-cu.

The new species is somewhat similar to H. (H.) wuxica sp. nov. described here, but it can be separated from the latter by 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. In H. (H.) wuxica sp. nov., 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.

Figures

FIGURES 31–35. Homoneura (Homoneura) yintiaolingica sp. nov. Male. 31. head, anterior view; 32. wing; 33. habitus, lateral view; 34. thorax, dorsal view; 35. abdomen, dorsal view.

FIGURES 36–40. Homoneura (Homoneura) yintiaolingica sp. nov. Male. 36. syntergosternite and epandrium, lateral view; 37. epandrial complex, posterior view; 38. syntergosternite, anterior view; 39. aedeagal complex, ventral view; 40. aedeagal complex, lateral view. Scale 0.5 mm.