Brachyneurina rhombica Jiao et Bu, 2017

Jiao, Ke-Long, Mu, Yi-Ran & Bu, Wen-Jun, 2017, Notes on the Genus Mamaev (Diptera: Cecidomyiidae) with Description of Two New Species from China., Zoological Studies 56 (4), pp. 1-7 : 6

Brachyneurina rhombica Jiao et Bu , sp. nov.

( Fig. 3 )

urn:lsid:zoobank.org:act:83E855BB-5B2E-4103-9E11-47B8FBF4B7AC

Type material: Holotype. ò, China, Hebei: Pingquan, Guangtou Mountain (41.3°N, 118.4°E), 29.VI.1995, Wen-Jun Bu leg., altitude 1300 m, Malaise trap, NKUCecid. No. BBL001 . Paratypes: 3òò, same data as holotype, NKUCecid. No. BBL002-004. All type specimens deposited in NKUM.

Etymology: The specific name rhombica means the male cerci separated broadly forming two sub-rhombic lobes.

Diagnosis: Gonocoxite with one sub- semicircular, extremely swollen mediobasal lobe; gonostylus gradually tapered from base to apex; cerci forming two sub-rhombic lobes; hypoproct apically slightly emarginated; aedeagus distinctly constricted in the middle with four pairs of sclerotized prominences surrounding aedeagus and extending downwards on both sides.

Description: Body colour dark brown. Body length: 1.20-1.30 mm (n = 4). Wing length (measured from the base): 1.20-1.30 mm (n = 4). Wing width: 0.50-0.60 mm (n = 4).

Head: Eye bridge 3-4 facets long in the middle of vertex. 3rd male flagellomere as hemisphaerica in figure 1, with the node 1.45-1.55 times as long as wide and the neck 1.70-1.80 times as long as wide, 0.50-0.51 times length of node. Others as B. hemisphaerica .

Thorax: Wing 2.35-2.36 times as long as wide. Others as B. hemisphaerica .

Abdomen same as B. hemisphaerica .

Male genitalia ( Figs. 3A, 3B, 3C ): Gonocoxite with one sub-semicircular, extremely swollen and densely pubescent mediobasal lobe; gonostylus slender and arched inwardly at basal 1/4, gradually tapered from base to apex, approximately 3/4 length of gonocoxite; cerci separated broadly forming two sub-rhombic lobes; hypoproct isosceles-trapezoid-shaped, apically slightly emarginated, shorter than cerci; aedeagus gradually tapered from the distal 1/3 to apex, as long as gonocoxite, distinctly constricted in the middle with four pairs of sclerotized prominences surrounding aedeagus and extending downwards on both sides. Others as B. hemisphaerica . Female genitalia unknown.

Distribution: China (Hebei).

Figures

Fig. 3. Brachyneurina rhombica sp. nov. Male holotype (NKUCecid. No. BBL001) (A-C): (A), Genitalia (dorsal view, cerci and hypoproct removed). (B), Genitalia (dorsal view). (C), cerci and hypoproct (dorsal view).