Homoneura (Homoneura) martini, 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 : 364-369

Homoneura (Homoneura) martini sp. nov.

( Figs 10–19 )

Diagnosis. Fore femur with 3 strong posteroventral and mid femur with 4 anterior setae; basal edge of brown apical spot on R 2+3 behind vertical level of crossvein dm-cu; surstylus short, slightly curved and blunt apically.

Description. MALE. Body length 5.8–6.3 mm, wing length 6.0– 6.1 mm. FEMALE. Body length 5.7–6.1 mm, wing length 5.8–6.4 mm.

Head ( Fig. 11 ) yellow. Frons brownish yellow except for pale yellow anterior marign, as long as wide; ocellar triangle yellow; ocellar setae proclinate, well developed, longer than anterior fronto-orbital setae; anterior frontoorbital setae slightly shorter than posterior fronto-orbital setae; gena about 1/6 height of eye. Antenna yellow; 1 st flagellomere 2.5 times longer than height; arista dark except for brownish basally, plumose with longest rays slightly shorter than height of 1 st flagellomere . Proboscis yellow, with yellowish and blackish setulae; palpus yellow, with blackish setulae.

Thorax ( Fig. 12 ) yellow. Mesonotum with sparse grayish white pruinosity, 0+3 dorsocentral setae (anteriormost dorsocentral setae distinctly behind transverse suture), acrostichal setulae in irregular 8 rows, prescutellar acrostichal seta as long as anteriormost dorsocentral setae. Legs yellow, tarsomeres 3–5 brownish yellow. Fore femur with 3 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 anterior setae and 1 apical posterior seta; mid tibia with 1 strong preapical anterodorsal seta and 3 strong apicoventral setae. Hind femur with 1–3 anteroventral setae and 1 preapical anterodorsal seta; hind tibia with 1 preapical anterodorsal seta and 1 short apicoventral seta. Wing ( Figs 13–14 ) pale yellow, basal edge of brown apical spot on R 2+3 behind vertical level of crossvein dm-cu and its size slightly larger than those on R 4+5 and M 1; a small round or quadrate spot on R 4+5, slightly beyond middle point of distance between crossveins r-m and dm-cu; brown apical spots on R 2+3 slightly separated or confluent with apical spot on R 4+5, two brown apical spots on R 4+5 and M 1 confluent; wide brown stripe on crossvein dm-cu; 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 4.9:1.3:1; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1:1.3; ultimate section of CuA 1 about 1/6 of penultimate. Halter yellow.

Abdomen ( Fig. 10 ) yellow. Male genitalia ( Figs 15–19 ): syntergosternite 7+8 a complete ring with a few dorsal setulae and 2–3 setulae around spiracle; epandrium broad medially in lateral view; surstylus short, slightly curved and blunt apically; hypandrium H–shaped, hypandrial apodeme long; pregonite broad medially with two apical processes in lateral view and postgonite wide triangular with a small teeth-like apical process in lateral view; phallus with a pair of lateral processes subapically and a long triangular dorsal process basally in ventral view; phallapodeme almost as long as phallus.

Type material. Holotype ♂ ( USNM), CHINA, Kiangsi S.E., Hong San , 28. VI. 1936, A.L.Melander (N 24°56'3.35", E 115°48'55.31") . Paratypes: 2 ♂ (one dissected without head), 3 ♀ ( USNM), Kiangsi S.E., Hong San, 23, 29–30. VI. 1936, A. L. Melander .

Distribution. China (Jiangxi).

Remarks. The new species is similar to Homoneura (Homoneura) tianjingshanica Shi & Yang from Guangdong Province, but the latter has the following characters: the surstylus is triangular with tiny setulae on apical 2/3; the pregonite is absent and the postgonite consists of a broad elliptical process with a setula and a narrow triangular process in lateral view; the phallus is round apically with a pair of broad semicircular basal processes, a pair of curved triangular lateral processes in ventral view and a pair of small dorsoapical teeth in lateral view ( Shi & Yang, 2014). This new species is also very similar to Homoneura (Homoneura) yaromi Yang, Hu & Zhu from Zhejiang Province, but the latter has the following characters: the body length is 8.6 mm; the basal edge of brown apical spot on R 2+3 has same vertical level of crossvein dm-cu and a large rectangular spot on R 4+5 is at middle point of distance between crossveins r-m and dm-cu ( Yang, Hu & Zhu, 2001).

Etymology. The new species is named after the dipterist Martin Hauser, who makes great contributions to insect research and provides constant help and support to the author Li Shi.

Figures

FIGURES 10–14. Homoneura (Homoneura) martini sp. nov. Female. 10. body, lateral view; 11. head, anterior view; 12. thorax, dorsal view; 13,14. wing.

FIGURES 15–19. Homoneura (Homoneura) martini sp. nov. Male. 15. syntergosternite and epandrium, lateral view; 16. syntergosternite, anterior view; 17. epandrial complex, posterior view; 18. phallus complex, ventral view; 19. phallus complex, lateral view. Scale bar =0.1mm.