Brachineura physiphora 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 : 106-107

Brachineura physiphora Jiao & Bu , sp. nov. ( Figs 7–9 )

Diagnosis. The new species is characterized in the genus Brachineura by the uniqueness of aedeagus ventrally with a blister-like protrusion in the sub-apex and dorsally with a finger-shaped structure. It is similar to B. fungicola Mamaev by the elbow-shaped gonostylus ( Fig. 8 ). However, the new species differs by aedeagus ventrally with a blister-like protrusion in the sub-apex and dorsally with a finger-shaped structure in the middle, and gonostylus distinctly longer than half of the length of gonocoxite ( Fig. 8 ), while B. fungicola has aedeagus only with a smaller prominence in the apex and gonostylus approximately as long as half the length of gonocoxite.

Description. Adult. Body colour yellow brown. Body length 0.90–1.00 mm; wing length (measured from the base) 0.95–1.05 mm; wing width 0.40–0.50 mm (n =3).

Head. Eye bridge 2 facets long in the middle of vertex. Male 3rd flagellomere as sphaerica in Fig. 1 , with the node 2.30–2.40 times as long as wide and the neck 1.00–1.10 times as long as wide, 0.19–0.20 times length of node. Others as B. sphaerica .

Thorax. Wing 2.40–2.50 times as long as wide. Others as B. sphaerica .

Abdomen. second through sixth sternites with an irregular but mostly double, posterior row of setae; eighth sternite sub-rectangular. Others as as B. sphaerica .

Male genitalia ( Figs 7–9 ). Gonocoxite slender, with mediobasal lobes undeveloped and reduced to two separated setae and a pair of closely set setae, each inserted in a small, smooth and sclerotized prominence; gonostylus elbow-shaped, distinctly longer than half length of gonocoxite, covered with a few setae and dense microtrichiae, with a short setae located apically on the inner side, toothed apically; cerci separated with a wide depression forming two broad lobes with a few long lateral setae; hypoproct distinctly longer than cerci, emarginated deeply and widely with a U-shaped depression forming two slender lobes; aedeagus stout and sub-cylindrical, distinctly longer than gonocoxite, but distinctly shorter than 1.5 times the length of gonocoxite, ventrally with a blister-like protrusion in the sub-apex and dorsally with a finger-shaped structure in the middle. Female genitalia unknown.

Material examined. Holotype. ♂. China, Yunnan, Simao (now as Pu’er), Caiyang River Nature Reserve , Luoluoxinzhai Mountain (22.48°N, 100.58°E; elev. 1500 m), 27. V .2000, leg. Wenjun Bu, Malaise trap, NKUCecid. No. BBSS001 . Paratypes. 2♂, same data as holotype, NKUCecid. No. BBSS002–003 .

Distribution. China (Yunnan).

Etymology. The specific name physiphora means the sub-apex of aedeagus ventrally with a blister-like protrusion.

Figures

Figures 7–9. Brachineura physiphora Jiao & Bu, sp. nov., male. 7. Genitalia, ventral view, one gonopod, cerci and hypoproct removed. 8. Genitalia, dorsal view, one gonopod removed. 9. Cerci and hypoproct, dorsal view. 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.