Togeciphus truncatus, Liu, Xiaoyan & Yang, Ding, 2012

Liu, Xiaoyan & Yang, Ding, 2012, Togeciphus Nishijima and Neoloxotaenia Sabrosky (Diptera: Chloropidae) from China, Zootaxa 3298, pp. 17-29 : 20-22

Togeciphus truncatus sp. nov.

(Figs. 3, 4, 6, 14–20)

Diagnosis. Legs yellowish brown except for fore coxa, distal portions of mid and hind tibiae, entire tarsi yellow, fore tibia and tarsus and basal 2/3 of hind tibia blackish brown, mid and hind tarsomere 5 brown. Cercus widely divergent, distally truncated.

Description. Male. Body length 2.2–2.9 mm, wing length 1.9–2.4 mm.

Head black with microtomentum, about 0.8 times as long as high, about as wide as thorax; face somewhat concave in lateral view; frons about 0.7 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 developed, about as long as pvt. Antenna yellow with thick grayish microtomentum except for dorsal portion of postpedicel black; postpedicel reniform, about 0.6 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 1.4–1.6 times as long as wide, bearing many long spine-like setae laterally and apically. Thoracic setae black and setulae yellowish brown, setae spine-like, developed except for postpronotal seta hairlike. npl 1+1, a npl and p npl subequal; a pa and p pa, as long as npl; 1 dc longest, 1.3 times as long as npl. Legs yellowish brown except for fore coxa, distal portions of mid and hind tibiae, entire tarsi yellow, fore tibia and tarsus, basal 2/3 of hind tibia blackish brown, mid and hind tarsomere 5 brown. Setulae on legs brown. Femoral organ present in 2 rows. Tibial organ distinct. Wing (fig. 6) about 2.3 times as long as wide, hyaline with a brown spot in middle; veins brown. Relative lengths of 2nd: 3rd: 4th costal sections = 2.4: 2: 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. 14–17 ): Epandrium small with an orbicular posterodorsal notch. Surstylus narrow and long, directed posteroventrad in lateral view, about 5.2 times as long as wide. Cercus widely divergent with broadly concave ventral incision, distally truncated. 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 2.6–3.4 mm, wing length 2.1–2.6 mm.

Female genitalia ( Figs. 18–20 ): 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.

Type material. Holotype male, CHINA: Guizhou: Suiyang, Kuankuoshui, 8. VI. 2010, Yan Li. Paratypes 20 males, 7 females, same data as holotype; 5 males, same place as holotype, 7. VI. 2010, Yan Li & Dan Zhou; 3 males, 3 females, same place as holotype, 10–11.VIII. 2010, Sipei Liu. Sichuan: 5 males, 2 females, Emei Mountain, Linggongli, 12. VIII. 2009, Yan Li.

Distribution. China (Guizhou, Sichuan).

Remarks. The new species is somewhat similar to T. katoi (Nishijima) . But it can be separated from the latter by the legs yellowish brown except for the fore coxa, distal portions of the mid and hind tibiae and entire tarsi yellow, the fore tibia and tarsus and basal 2/3 of the hind tibia blackish brown, and cercus distally truncated. In T. katoi , the legs are yellow except for the distal portion of the fore tibia yellowish brown, the fore tarsus is blackish brown; the distal portion of the cercus is pointed ( Kanmiya 1983).

Etymology. The specific name is from the Latin truncatus (“truncate”), and refers to the cercus distally truncated.

Figures

FIGURES 14 – 17. Togeciphus truncatus sp. nov., Male. 14. epandrium, posterior view; 15. epandrium, lateral view; 16. hypandrium and phallic complex, ventral view. 17. hypandrium and phallic complex, lateral view.

FIGURES 18 – 20. Togeciphus truncatus sp. nov., Female. 18. terminalia, dorsal view; 19. terminalia, lateral view; 20. terminalia, ventral view.