Toxorhina (Ceratocheilus) univirgata, Zhang, Xiao, Li, Yan & Yang, Ding, 2015

Zhang, Xiao, Li, Yan & Yang, Ding, 2015, A review of the genus Toxorhina Loew from China, with descriptions of three new species (Diptera, Limoniidae, Limoniinae), ZooKeys 480, pp. 59-80 : 73-75

Taxon classification Animalia Diptera Limoniidae

Toxorhina (Ceratocheilus) univirgata sp. n. Figs 13, 14

Diagnosis.

Prescutum brownish yellow with three broad brown stripes. Pleuron yellow with one dark brown stripe. Wing tinged pale grey; R2+3 ending beyond end of basal section of R4+5, basal section of CuA1 slightly before fork of M. Sternites of abdomen brown with basal several segments paler. Gonostylus with base stout, middle with a stout and ventrally curved spine. Rods of aedeagus very long.

Description.

Male. Body length 5.5 mm, wing length 5.5 mm, rostrum broken with remaining part length 1.5 mm.

Head (Fig. 13b). Dark brown to brownish black. Hairs on head dark brown. Antenna length 0.6 mm. Scape and pedicel dark brown; flagellomeres brown. Pedicel enlarged and nearly globose. First flagellomere subconical; remaining flagellomeres cylindrical, each flagellomere longer and slenderer than previous one, terminal two flagellomeres longest with several long hairs. Rostrum dark brown with dark brown hairs.

Thorax. Pronotum dark brown. Prescutum brownish yellow with three broad brown stripes. Scutum dark brown with middle area paler, each lobe with a light yellow spot. Scutellum and mediotergite dark brown (Fig. 13c). Pleuron (Fig. 13a) yellow with one dark brown stripe extending from cervical region to base of abdomen. Hairs on thorax dark brown. Coxae pale yellow; trochanters yellow with tips black; other parts missing. Wing (Fig. 13d) tinged pale grey; veins pale brown. Venation: Sc1 ending near middle of Rs, Sc2 before origin of Rs; R2+3 ending beyond end of basal section of R4+5; basal section of CuA1 slightly before fork of M; A1 curved relatively smoothly. Haltere length 0.8 mm, pale yellow with knob darker.

Abdomen (Fig. 13a). Tergites brownish black. Sternites brown with basal several segments paler. Segment five to eight black with segment eight paler. Segment nine yellow. Hairs on abdomen brownish black.

Hypopygium (Fig. 14). Generally yellow to pale brownish yellow. Gonocoxite conical. Gonostylus with base stout, middle with a stout and ventrally curved spine. Interbase nearly oval, tip blunt. Aedeagus with tip divergent, rods filiform and very long.

Female. Unknown.

Type material.

Holotype male (CAU), China: Yunnan, Lvchun, Mt. Huanglian (26°34'36"N, 113°28'12"E, 1542 m), 2013.VII.25, Mengchao Tan (light trap).

Distribution.

China (Yunnan).

Etymology.

The specific epithet is an adjective and refers to the dark brown stripe on pleuron (from Latin univirgatus = uni- (adj., meaning “single”) + virgatus (adj., meaning striped)).

Remarks.

This new species is somewhat similar to Ceratocheilus (Ceratocheilus) fulvicolor in having the similar male hypopygium and wing, but it can be easily distinguished from the latter by the prescutum (Fig. 13c) brownish yellow with three broad brown stripes, pleuron (Fig. 13a) yellow with one dark brown stripe, and abdomen with tergites brownish black (Fig. 13a). In Toxorhina (Ceratocheilus) fulvicolor , the prescutum is pale brownish yellow and irregularly variegated, the pleuron is pale yellow, and the tergites of the abdomen are brownish yellow with the posterior borders narrowly brown ( Alexander 1967).