Lonchoptera unicolor Dong, Pang and Yang

Dong, Qibiao, Pang, Baoping & Yang, Ding, 2008, Lonchopteridae (Diptera) from Guangxi, Southwest China, Zootaxa 1806, pp. 59-65 : 61-63

Lonchoptera unicolor Dong, Pang and Yang , sp. nov.

( Figs. 12–23 )

Diagnosis. Antennae brown; arista black. Thorax uniformly dark brown. Mid tibia shorter than fore tibia. Cercus small lamellate.

Description. MALE. Body length 2.6–2.7 mm, wing length 2.6–2.8 mm. Head dark brown with pale pruinosity, except face and gena dark yellow. Vestiture on head black. Antennae brown; arista long, black. Proboscis and palpus brown.

Thorax dark brown with pale pruinosity, but slightly pale ventrally; humerus brownish yellow; scutellum dark brown with brown margin. Setae black. Legs ( Figs. 12–15 ) brownish yellow with brown tibiae and tarsi.

Mid tibia shorter than fore tibia. Vestiture on legs black. Fore femur apically with 2 a, 1 d, 1 ad, 1 av, 1 pv and 2 pd; fore tibia with 1 short d at base, 1 ad and 1 pd at middle, apically with 1 short d, 1 pv and 1 pd. Fore tarsomere 3 with 7 small ventral spines; tarsomere 5 with 6 seta-like setulae. Mid femur with 1 a at basal 2/5, apically with 1 a, 1 av, 1 pv and 1 pd; mid tibia with 1 short d at base, 1 ad and 1 pd at middle, apically with 1 preapical ad, 1 preapical v, 1 d, 1 short av and 1 long pv. Hind femur apically with 1a, 1 av, 2 ad, 1 pd, 1 pv and 1 pd; hind tibia basally with 1 short d, 1 ad and 1 pd, apically with 1 preapical ad, 2 preapical short av and 1 d. Hind tarsomere 1 with 1 slightly long av and 1 pv at extreme base, apically with 1 av and 1 pv. Wing pale yellowish brown; veins brown with short dorsal setae except Sc and R2+3; a row of longer seta-like setulae at base of C. Relative lengths of M1+2: M2 = 38: 75. Halter dark brown with brown stem.

Abdomen dark brown, covered with pale pruinosity. Vestiture on abdomen black. Tergite 8 small, trapeziform. Sternite 3 ( Fig. 16 ) with a trapezoid mid-posterior incision. Male genitalia ( Figs. 17–21 ): Epandrium longer than broad. Cercus rather small, wider apically, with two rows of thin setulae at middle. Aedeagus long conical, extending near end of cercus. Gonopod apically deeply incised into two lateral lobes, each lobe with 6 long outer setae at base and 2 long inner setae at tip; a short lateral process with 2 curved spines at extreme tip. Paramere acute apically, with a curved subapical process.

FEMALE. Body length 2.7–2.9 mm, wing length 3.2–3.3 mm. Fore tarsomeres 3 and 5 normal. Sternite 3 not incised, without setae. Female genitalia ( Figs. 22–23 ): Cercus small, nearly elliptical, setulose. Epiproct and hypoproct small but distinct, with many small setulae.

Type material. Holotype male, Guangxi: Shangsi, Pinglongshan, 1. IX. 2006, Yinxia Liao. Paratypes 5 males and 4 females, same data as holotype; 3 males and 2 females, same locality as holotype, 22. V. 2006, Yinxia Liao.

Distribution. Known only from the type locality in Guangxi.

Etymology. The species is named after the single color of the body.

Remarks. The new species is similar to L. melanosoma Yang from Yunnan of China, but it can be separated from the latter by the scutellum dark brown and the male cercus rather short (1/3 as long as the epandrium). In L. melanosoma , the scutellum is brownish yellow, and the male cercus is rather long (1/2 as long as the epandrium) ( Yang, 1998).

Figures

FIGURES 12 – 23. Lonchoptera unicolor sp. nov. Male (12 – 21). 12. Fore tibia, dorsal view; 13. mid tibia, dorsal view; 14. hind tibia, dorsal view; 15. fore tarsomeres 2 – 5, ventral view; 16. sternite 3, ventral view; 17. epandrium and cerci, dorsal view; 18. epandrium and cerci, lateral view; 19. hypandrium and genital complex, ventral view; 20. hypandrium and genital complex, lateral view; 21. hypandrium and genital complex, dorsal view. Female (22 – 23). 22. Genitalia dorsal view; 23. genitalia ventral view.