Homoneura (Homoneura) jiangxiensis, Shi & Gao & Shen, 2017

Shi, Li, Gao, Xue Feng & Shen, Rong Rong, 2017, Four new species of the subgenus Homoneura from Jiangxi Province, China (Diptera: Lauxaniidae: Homoneura), Zootaxa 4365 (3), pp. 361-377 : 363-364

Homoneura (Homoneura) jiangxiensis sp. nov.

( Figs 1–9 )

Diagnosis. Fore femur with 3–4 strong posteroventral setae and mid femur with 4–6 anterior setae; basal edge of brown apical spot on R 2+3 at same vertical level of crossvein dm-cu and its size nearly two times as long as those on R 4+5 and M 1; surstylus short and broad, with a row of long apical setulae.

Description. MALE. Body length 5.6 mm, wing length 5.3 mm. FEMALE. Body length 5.5–6.5 mm, wing length 5.6–6.3 mm.

Head ( Figs 2–3 ) yellow. Frons as long as wide; ocellar triangle yellow; ocellar setae proclinate, well developed, as long as anterior fronto-orbital setae; anterior fronto-orbital setae slightly shorter than posterior fronto-orbital setae; gena about 1/5–1/6 height of eye. Antenna yellow; 1 st flagellomere 2.0 times longer than height; arista dark except for brownish basally plumose with longest rays as long as height of 1 st flagellomere . Proboscis yellow, with yellowish and blackish setulae; palpus yellow, with blackish setulae.

Thorax ( Fig. 4 ) yellow. Mesonotum with 0+3 dorsocentral setae (anteriormost dorsocentral setae distinctly behind transverse suture), acrostichal setulae in irregular 10 rows, prescutellar acrostichal seta as long as anteriormost dorsocentral seta. Legs yellow, tarsi brownish yellow. Fore femur with 3–4 strong posteroventral setae, 8 posterodorsal setae, and ctenidium with 13–16 short seta; fore tibia with 1 long preapical anterodorsal seta and 1 short apicoventral seta. Mid femur with 4–6 anterior setae (male 4–5, female 5–6) and 1 apical posterior seta; mid tibia with 1 strong preapical anterodorsal seta and 3 strong apicoventral setae. Hind femur with 2 anteroventral setae and 1 preapical anterodorsal seta; hind tibia with 1 preapical anterodorsal seta and 1 short apicoventral seta. Wing ( Fig. 1 ) pale yellow, basal edge of brown apical spot on R 2+3 at same vertical level of crossvein dm-cu and its size nearly two times as long as those on R 4+5 and M 1; an elliptical spot on R 4+5, at middle point of distance between crossveins r-m and dm-cu; brown apical spots on R 2+3, R 4+5 and M 1 separated entirely; wide brown stripe on crossvein dm-cu distinctly constricted at middle; subcostal cell slightly brown; 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 4.6:1.2:1; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.4; ultimate section of CuA 1 about 1/6 of penultimate. Halter yellow.

Abdomen ( Fig. 1 ) yellow. Male genitalia ( Figs 5–9 ): syntergosternite 7+8 being a complete ring with a few dorsal setulae; epandrium broad in lateral view; surstylus short and broad, with a row of long apical setulae; hypandrium H–shaped, hypandrial apodeme short and narrow; pregonite blunt round with a medial setula and postgonite subuliform apically; phallus broad medially in lateral view and having a pair of lateral processes and a distinct distal incision in ventral view; phallapodeme as long as phallus.

Type material. Holotype ♂ ( USNM, antennae broken), CHINA, Kiangsi S.E., Hong San , 28. VI. 1936, A.L.Melander (N 24°56'3.35", E 115°48'55.31") . Paratypes: 4 ♀, Kiangsi S.E., Hong San, 24, 27, 30. VI. 1936, A. L. Melander; 1 ♀, Kiangsi S.E., Hong San, 15. VII., 1936, A. L. Melander.

Distribution. China (Jiangxi).

Remarks. The new species is very similar to Homoneura (Homoneura) stepheni sp. nov., but the latter has the following characters: the surstylus is consisting of a wide knife-like process with many short ventral hairs and a triangular process, incurved apically in lateral view; the pregonite is subuliform and the postgonite is furcated apically; the phallus is broad apically with a pair of dorso-medial processes.

Etymology. The new species is named after the locality Jiangxi Province.

Figures

FIGURES 1–4. Homoneura (Homoneura) jiangxiensis sp. nov. Female. 1. body, lateral view; 2, 3. head, anterior and lateral view; 4. thorax, dorsal view.

FIGURES 5–9. Homoneura (Homoneura) jiangxiensis sp. nov. Male. 5. syntergosternite and epandrium, lateral view; 6. syntergosternite, anterior view; 7. epandrial complex, posterior view; 8. phallus complex, ventral view; 9. phallus complex, lateral view. Scale bar =0.1mm.