Brachineura prodolichata Jiao & Bu, 2018

Jiao, Kelong, Wang, Hao, Wang, Yuanhong & Bu, Wenjun, 2018, Notes on the genus Brachineura Rondani (Diptera: Cecidomyiidae), with description of three new species from China, Zoological Systematics 43 (1), pp. 103-108 : 107-108

Brachineura prodolichata Jiao & Bu , sp. nov. ( Figs 10–11 )

Diagnosis. The new species is characterized in the genus Brachineura by the unique combination of gonocoxite sharply arched inwardly at distal 1/4, and aedeagus prolonged, approximately two times as long as the length of gonocoxite. It is similar to B. flabellata Fedotova & Sidorenko by gonocoxite sharply arched inwardly at sub-distal ( Fig. 11 ). However, the new species differs by aedeagus prolonged, approximately two times as long as the length of gonocoxite and gonostylus normally shaped, approximately as long as 2/3 the length of gonocoxite ( Fig. 11 ), while B. flabellata has aedeagus distinctly shorter than gonocoxite and gonostylus rudimentary, approximately as long as 1/3 the length and width of gonocoxite.

Description. Adult. Body colour yellow. Body length 1.20–1.30 mm (n =4); wing length (measured from the base) 1.20–1.30 mm; wing width 0.50–0.60mm (n =4).

Head. Eye bridge 5 facets long in the middle of vertex. 2nd male flagellomere as sphaerica in Fig. 1 , with the node 2.10–2.20 times as long as wide and the neck 0.60–0.70 times as long as wide, 0.14–0.15 times length of node. Others as B. sphaerica .

Thorax. Wing 2.10–2.20 times as long as wide. Others as B. sphaerica .

Abdomen. First through sixth tergites with an irregular but mostly single, posterior row of setae; eighth sternite crescent. Others as B. sphaerica .

Male genitalia ( Figs 10–11 ). Gonocoxite slender, sharply arched inwardly at distal 1/4, with mediobasal lobes undeveloped and reduced to a pair of closely set setae, each inserted in a small, smooth and sclerotized prominence; gonostylus sub-conical, distinctly longer than the half length of gonocoxite, covered with a few setae and dense microtrichiae, toothed apically; cerci separated with a wide depression forming two broad lobes with a few long lateral setae; hypoproct a little shorter than cerci, emarginated widely forming two triangular lobes in the dorsal view; aedeagus sub-conical and prolonged, approximately two times as long as the length of gonocoxite, with the distal 1/3 constricted distinctly and the apex rounded. Female genitalia unknown.

Material examined. Holotype. ♂. China, Guizhou, Daozhen, Dasha River , Fairy Cave (also called as Xiannü Cave , 29.32°N, 107.40°E; elev. 600 m), 24.V.2004, leg. Weibing Zhu, Malaise trap, NKUCecid. No. BBC001. Paratypes. 3♂, same data as holotype, NKUCecid. No. BBC002–004 .

Distribution. China (Guizhou).

Etymology. The specific name prodolichata means the aedeagus sub-conical and prolonged, approximately two times as long as the length of gonocoxite, with the distal 1/3 constricted distinctly and the apex rounded.

Funding This study was supported by National Natural Science Foundation of China (31401995, J1210005) and Tianjiin Science & Technology Development Fundation for Higher School (20140606).

Acknowledgements We thank Dr. Jun Li and Ms. Yüxia Jiang (College of Life Sciences, Zhaoqing University, China) and Dr. Weibing Zhu (Shanghai Entomological Museum of Chinese Academy of Sciences, Shanghai, China) for collecting some specimens respectively from Heilongjiang and Guizhou, China. We are grateful to two anonymous reviewers whose comments greatly improved the manuscript .

Figures

Figures 10–11. Brachineura prodolichata Jiao & Bu, sp. nov., male. 10. Genitalia, ventral view, one gonopod, cerci and hypoproct removed. 11. Genitalia, dorsal view, one gonopod removed. Scale bars=20μm.

Figures 1–6. Brachineura sphaerica Jiao & Bu, sp. nov., male. 1. The 3rd flagellomere, dorsal view. 2. Palpus, lateral view. 3. Wing, dorsal view. 4. Fore acropod, lateral view. 5. Genitalia, dorsal view, one gonopod removed. 6. Genitalia, ventral view, one gonopod removed. Scale bars: 1–2, 4–6=20μm; 3=100μm.