Czernyola shanxiensis, Yang & Yin & Xi, 2021

Yang, Shuai-Lai, Yin, Xin-Ming & Xi, Yu-Qiang, 2021, Three new species of the genus Czernyola Bezzi, 1907 (Diptera, Clusiidae) from China, ZooKeys 1029, pp. 175-183 : 175

Czernyola shanxiensis sp. nov. Figures 13-18

Type material.

Holotype, ♂, China, Shanxi, Fuxian, Ziwuling, 1271 m, 04.VIII.2019, leg. Qi-Cheng Yang. Paratypes, 1 ♂, China, Shanxi, Huangliang, Liuyalinchang, 1120 m, 04.VIII.2019, leg. Qi-Cheng Yang; 1 ♂. China, Shanxi, Fuxian, Ziwuling, 1995 m, 07.VIII.2019, leg. Qi-Cheng Yang.

Diagnosis.

Head brownish or black, face and most of gena white; antenna white; palpus white. Mesonotum dark brown, with brownish lateral side, yellow to dark brown near both lateral margins. Surstylus without tubercles. Pregonite thin, with 2 strong and 1 small setae and many microchaetae.

Description.

Male. Body length 2.8 mm, wing length 2.5 mm.

Head (Fig. 13 ) brownish or black; face and gena white; gena ~ 1/8 as high as eye, with 4 setae. Setae and setulae yellowish brown, ocellar tubercle slightly bulge. Four fronto-orbitals, hind seta ½ as long as anterior seta. Ocellar seta and postvertical seta nearly equal in length, inner vertical seta as long as outer vertical seta. Vibrissa well-developed. Antenna white, arista sparsely short plumose. Palpus white.

Thorax dark brown or black. Pronotum blackish dark, mesonotum dark brown with both sides brownish, margin yellow to brown, scutum much darker. Setae and setulae on thorax yellowish brown. Prescutellar acrostichal seta present. One postpronotal seta, 2 notopleural setae, 3 dorsocentral setae, anterior seta short; 1 postsutural intra-alar seta; 2 postalar setae, scutellum dark brown, 2 lateral scutellar setae, apical scutellar seta long. Thoracic pleura yellowish. Anepisternum dark yellow, with brownish spot, with 3 to 4 rows of setulae, 2 anepisternal setae, 1 katepisternal seta. Legs white yellowish. Wing (Fig. 14 ) dusky, more heavily infuscated on distal part along r2+3. Veins brown. M1 ratio: distal portion of M1 (beyond Dm-Cu) 4.3 × as long as Dm-Cu. Halter white.

Abdomen dark brown, anterior half of tergite I yellow. Setulae and setae on abdomen black. Male genitalia (Figs 15-18 ): externally as described for C. planipalpis except as follows: cerci divided, large, setose and with 2 apical setae. Pregonite thin, 2 strong setae of equal lengths, 1 small seta with many microchaetae. Distiphallus sac-like, consists of many sclerotized parts.

Female. Unknown.

Distribution.

China (Shanxi).

Etymology.

The specific epithet refers to the type locality.

Remarks.

Czernyola shanxiensis can be separated from other species of this genus by the genitalia, as there are entirely divided cerci, the surstylus is without tubercules, and pregonite is thin, and it has 2 strong setae of equal length,1 smaller seta, and many microchaetae.

Figures

Figures 13 - 18. Czernyola shanxiensis sp. nov. (male) 13 head, lateral view 14 wing 15 epandrium, cerci, and surstyli, posterior view 16 epandrium, cerci, and surstyli, lateral view 17 hypandrial complex, posterior view 18 hypandrial complex, lateral view. Scale bars: 0.1 mm.