Homoneura (Homoneura) multiseta Chen & Li, 2024

Chen, Xulong, You, Pengyan, Li, Wenliang & Zhang, Zhisheng, 2024, Seven new species of the subgenus Homoneura Malloch (Diptera, Lauxaniidae, Homoneura) from Jiangjin District, southwestern Chongqing, China, ZooKeys 1206, pp. 45-80 : 45-80

Homoneura (Homoneura) multiseta Chen & Li sp. nov.

Figs 41–45 , 46–50 Chinese name: 多鬃同脉缟蝇

Type material.

Holotype: ♂, China, Chongqing City, Jiangjin District, Simianshan Natural Reserve , Dahonghai , 28 ° 35 ' 34.27 " N, 106 ° 26 ' 34.93 " E, 1144 m, 15. VII. 2022, leg. Xulong Chen. Paratypes: 1 ♂, China, Chongqing City, Jiangjin District, Simianshan Natural Reserve, Zhengqiangou, 28 ° 36 ' 59.54 " N, 106 ° 26 ' 25.88 " E, 1273 m, 14. VI. 2022, leg. Xulong Chen.

Etymology.

The specific name comes from the combination of the prefix multi and the Latin seta, referring to the epandrium covered by many setae.

Diagnosis.

Basal margin of brown apical spot on R 2 + 3 at same vertical level as crossvein dm-cu; brown apical spots on R 2 + 3, R 4 + 5, and M 1 slightly confluent. Male tergites 2–5 with brown posterior margin. Surstylus blunt and rolled up in ventral view. Hypandrium U-shaped. Pregonite broad and postgonite long, spine-like. Phallus with small sharp process in lateral view.

Description.

Male. Body length 8.7–8.8 mm, wing length 8.5 mm.

Head (Fig. 41 ) yellow. Frons as long as wide and parallel-sided; ocellar triangle yellow, ocellar seta developed. Gena ~ 1 / 8 height of eye. Antenna yellow, first flagellomere ~ 2.0 × longer than high; arista black except yellow at base, long plumose, with longest ray shorter than height of first flagellomere. Proboscis and palpus yellow.

Thorax (Fig. 44 ) yellow, with gray pruinosity. 0 + 3 dorsocentral setae, anteriormost postsutural dorsocentral seta far from scutal suture, acrostichal setulae in ten rows. Legs yellow. Fore femur with nine posterior dorsal setae, four posterior ventral setae and ctenidium with 18 short setae; fore tibia with one dorsal preapical seta and one short apical ventral seta. Mid femur with five or six anterior setae and one apical posterior seta; mid tibia with one dorsal preapical seta and three strong apical ventral setae. Hind femur with several weak anterior ventral setae and one preapical anterior dorsal seta; hind tibia with one weak dorsal preapical seta and one short apical ventral seta. Wing (Fig. 42 ) slightly yellow, basal margin of brown apical spot on R 2 + 3 at same vertical level as 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 hyaline; seven short hairs present at base of R 4 + 5; costa with 2 nd (between R 1 and R 2 + 3), 3 rd (between R 2 + 3 and R 4 + 5), and 4 th (between R 4 + 5 and M 1) sections in proportion of 4: 1: 0.8; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1: 1; ultimate section of CuA 1 ~ 1 / 7 of penultimate. Haltere yellow.

Abdomen (Fig. 45 ) yellow, tergites 2–5 with brown posterior margin. Male genitalia (Figs 46–50 ): syntergosternite circular with a trapeziform ventral process, with several dorsal setulae. Epandrium broad in lateral view; surstylus blunt in lateral view, hairy and rolled up in ventral view. Hypandrium U-shaped. Pregonite broad, with a small tooth apically, postgonite long spine-like. Phallus curved backwards, with a small sharp process in lateral view. Phallapodeme shorter than phallus.

Female. Unknown.

Distribution.

China (Chongqing).

Remarks.

The new species resembles Homoneura (Homoneura) shunhuangshana in the habitus, basal margin of brown apical spot on R 2 + 3 at same vertical level as crossvein dm-cu and mesonotum with acrostichal setulae in ten rows [see Chen and Li 2022: figs 7 B – D], but it can be distinguished from the latter by the following: subcostal cell hyaline; brown apical spots on R 2 + 3 shorter, as long as 1 / 2 length of ultimate section of M 1; brown median spot on R 4 + 5 behind middle point of distance between r-m and dm-cu; surstylus blunt, rolled up in ventral view; hypandrium U-shaped. In H. (H.) shunhuangshana , subcostal cell pale brown apically; brown apical spots on R 2 + 3 longer, at least 2 / 3 length of ultimate section of M 1; brown median spot on R 4 + 5 at middle point of distance between r-m and dm-cu; surstylus horn-shaped in lateral view; hypandrium H-shaped [see Chen and Li 2022: figs 7 B, 8 A, D].

Figures

Figures 41–45. Homoneura (Homoneura) multiseta sp. nov. male 41 head, anterior view 42 wing 43 habitus, lateral view 44 thorax, dorsal view 45 abdomen, dorsal view.

Figures 46–50. Homoneura (Homoneura) multiseta sp. nov. male 46 syntergosternite and epandrium, lateral view 47 epandrial complex, posterior view 48 syntergosternite, anterior view 49 phallic complex, ventral view 50 phallic complex, lateral view. Scale bar: 0.5 mm.