Togeciphus katoi ( Nishijima, 1954 )

Liu, Xiaoyan & Yang, Ding, 2012, Togeciphus Nishijima and Neoloxotaenia Sabrosky (Diptera: Chloropidae) from China, Zootaxa 3298, pp. 17-29 : 18-20

Togeciphus katoi ( Nishijima, 1954)

( Figs. 1, 2 , 5 , 7–13 )

Chaetaspis katoi Nishijima, 1954: 85 . Type locatity: JAPAN: Niigata.

Elachiptera brevipennis (Meigen) sensu Henning, 1941: 170 .

Togeciphus katoi: Nishijima, 1955: 53 ; Nartshuk, 1962: 674; Kanmiya, 1983: 74; Yang, 1989: 84; Yang, 1996: 570.

Diagnosis. Legs yellow except for distal portion of fore tibia yellowish brown, fore tarsus blackish brown, mid and hind tarsomere 5 brown. Cercus widely divergent, distally pointed.

Description. Male. Body length 2.1–2.7 mm, wing length 1.8–2.1 mm.

Head black with microtomentum, about 0.8 times as long as high, wider than thorax; face somewhat concave in lateral view; frons about 0.8 times as long as wide, projecting only slightly in front of eye; gena broad, about 0.5 times as high as postpedicel; vibrissal angle obtuse; parafacial narrow; clypeus light black. Ocellar triangle shiny, black, smooth, reaching to anterior margin of frons with pointed apex; ocellar tubercle bright black. Cephalic setae and setulae black. orb hair-like, reclinate; oc hair-like, upright, convergent; pvt developed, upright, convergent, about 2 times as long as oc; vti hair-like, about as long as oc; vte also developed, about as long as pvt. Antenna yellow with thick grayish microtomentum except for dorsal portion of postpedicel black; postpedicel reniform, about 0.7 times as long as wide; arista black, flattened with long marginal pubescence. Proboscis brown to yellow with yellow setulae; palpus black with blackish setulae.

Thorax black with microtomentum. Scutum almost as long as wide, somewhat shagreened with short or partly extremely long setulae. Thoracic pleuron shiny black. Scutellum narrowly prolonged posterad beyond apex of triangular basal part, about 1.5–2.0 times as long as wide, bearing many long spine-like setae laterally and apically. Thoracic setae black and setulae yellowish brown, setae developed, spine-like except for postpronotal seta hair-like. npl 1+1, a npl and p npl subequal; a pa and p pa, slightly shorter than npl; 1 dc 1.2 times as long as npl. Legs yellow except for distal portion of fore tibia yellowish brown, fore tarsus blackish brown, mid and hind tarsomere 5 brown. Setulae on legs brown. Femoral organ present in 2 rows. Tibial organ narrow. Wing (fig. 5) about 2.5 times as long as wide, hyaline with an indistinct broad light brown maculae; veins brown. Relative lengths of 2nd: 3rd: 4th costal sections = 2: 1.7: 1; crossveins r-m and m-m not approximate, r-m at basal 0.6 of discal cell. Halter pale yellow.

Abdomen yellowish brown except for tergites 1+2 yellow and laterally black; venter yellow. Setulae on abdomen black.

Male genitalia ( Figs. 7–10 ): Epandrium small with an orbicular posterodorsal notch. Surstylus narrow and long, directed posteroventrad in lateral view, about 4.8 times as long as wide. Cercus widely divergent with broadly concave ventral incision, distally pointed. Pregonite indistinct; postgonite broadened in rough triangular form and largely covering basiphallus, with some sensory setulae; basiphallus longer than wide, with a narrow sclerotized apical band. Hypandrium closed distally.

Female similar to male. Body length 2.2–2.9 mm, wing length 2.0– 2.2 mm.

Female genitalia ( Figs. 11–13 ): Tergum 9 subpentagonal, distinctly longer than wide, with 2 long setae; sternum 9 long and apically round with long stout setae at apical portion. Cercus long and distally stout with some long setae.

Material examined. CHINA: Guizhou: 12 males, 10 females, Suiyang, 7–9. VI. 2010, Yan Li & Dan Zhou. Guangxi: 1 male, 3 females, Maoershan Mountain, 2–3. V. 2004, Ding Yang. Yunnan: 2 males, 3 females, Mengla, 6. V. 2005, Xiaoshuan Bai. Hunan: 1 male, 2 females, Dongtinghu, 21. X. 2007, Qifei Liu & Shan Huo. Sichuan: 2 females, Leshan, 18. VIII. 2009, Junchao Wang. Fujian: 2 males, Dehua, 6. VII. 2010, Xiaoyan Liu; 1 male, Wuyishan, 18. VII. 2010, Xiaoyan Liu.

Distribution. China (Yunnan, Guizhou, Guangxi, Hunan, Sichuan, Taiwan), Japan.

Remarks. Kanmiya redescribed this species and gave the figures of male genitalia. In his description, the scutellum is about 2.0-2.5 times as long as wide. We have examined and compared some material from the southern provinces of China with the Japanese T. katoi . No differences are observed in principal characters except for scutellum about 1.5–2.0 times as long as wide. The scutellum variation is considered to be varying in localities, since no differences were found in the male genitalia ( Kanmiya 1983).

Figures

FIGURES 1 – 2. Togeciphus katoi (Nishijima), Male. 1. body dorsal view; 2. body lateral view. FIGURES 3 – 4. Togeciphus truncatus sp. nov., Male. 3. body dorsal view; 4. body lateral view.

FIGURES 5 – 6. wing. 5. Togeciphus katoi (Nishijima); 6. Togeciphus truncatus sp. nov.

FIGURES 7 – 10. Togeciphus katoi (Nishijima), Male. 7. epandrium, posterior view; 8. epandrium, lateral view; 9. hypandrium and phallic complex, ventral view. 10. hypandrium and phallic complex, lateral view.

FIGURES 11 – 13. Togeciphus katoi (Nishijima), Female. 11. terminalia, dorsal view; 12. terminalia, lateral view; 13. terminalia, ventral view.