Conchapelopia togamaculosa Sasa & Okazawa

Niitsuma, Hiromi & Tang, Hongqu, 2017, Notes on the genus Conchapelopia Fittkau (Diptera: Chironomidae: Tanypodinae) from southern China, with description of a new species, Zootaxa 4236 (2), pp. 327-334 : 333

Conchapelopia togamaculosa Sasa & Okazawa

( Figures 2 B, D; 3F, G)

Conchapelopia togamaculosa Sasa & Okazawa, 1992: 209 ; Niitsuma, 2008: 95.

Material examined. 1 male with pupal exuviae, CHINA: Guangdong Province, Guangzhou City, Conghua District, Lyutian Town , a brook in Mt. Guifeng , 1.iv.2015 (emerged 5.iv.2015), HQ Tang; 1 pharate male, Guangzhou City, Huangpu District , Bage county , a brook near Jinyuan Villa, 28.iv.2015, HQ Tang ; 1 male with pupal and larval exuviae, as previous except 20.iii.2016 (emerged 29.iii.2016); 3 males, Anhui Province, Huangshan Nature Conservation Reserve, Tangkou Town, Fu stream in Mt. Huang , 30°04.317'N, 118°09.320'E, Alt. 520 m, 26.v.2012, light trap, HQ Tang ; 5 males, 2 females, Anhui Province, Jinzhai City, Qingshan Town, a river behind Qingshan Hotel , 2.v.2014, HQ Tang.

Remarks. The Chinese population shows no significant difference to the Japanese, although the banded wing and the pubescent ventral lobe of the hypopygial median volsella are indistinct in some Chinese material. There is not much difference between the thoracic horns ( Fig. 2 B) and the spinulation patterns on the abdominal tergite VIII ( Fig. 2 D) in the pupae of both populations, and the cephalic setation in both the larvae ( Fig. 3 F, G). The distribution has extended from northern Japan to south-eastern China.

Distribution. China (Anhui and Guangdong Provinces); Japan.

Comments. Most of Conchapelopia species can be separated from each other by the characteristic hypopygial median volsella, especially the developed extent of basolateral appendage and apical lamellate processes. The pubescent ventral lobe is a new character, which is hard to observe in certain species and easy to omit. The coloration of thorax and abdomen is varied remarkably due to different emergence conditions and environment, more caution should be taken when use those characters as a discriminator, while, the coloration of wings and legs is relatively stable and more reliable.

Sixteen species of Conchapelopia have been known from Asia ranging from the Oriental region to the eastern part of the Palaearctic region. Some of them are quite similar to one another, but easily separable by the following key to male adults, with the exception of C. solita (Johannsen) which is known only by the female.