Bryophaenocladius parictericus, Lin, Xiaolong, Qi, Xin & Wang, Xinhua, 2012

Lin, Xiaolong, Qi, Xin & Wang, Xinhua, 2012, Two new species of Bryophaenocladius Thienemann, 1934 (Diptera, Chironomidae) from China, ZooKeys 208, pp. 51-60 : 56-58

Bryophaenocladius parictericus sp. n. Figs 5-9

Diagnosis.

The male imago can be distinguished from known species of the genus by the following combination of characters: AR 0.52-0.55; third palpomere with apical digitiform projection; Costa extension 115-143, 122 μm long; squama bare; mid tibia comb with 3-7, 5 spines; anal point hyaline, slender with blunt apex; crista dorsalis absent; inferior volsella bubble-shaped, with 8-12, 9 setae.

Description.

Male imago (n = 6). Total length 2.65-3.08 2.76 mm. Wing length 1.63-2.48, 2.22 mm. Total length/wing length 1.10-1.46, 1.26. Wing length/length of profemur 2.78-3.19, 3.03.

Coloration. Dark brown.

Head (Fig. 5). AR 0.52-0.55 (n = 2). Ultimate flagellomere 230-245 (n = 2) μm long. Temporal setae 3-9, 7 including 2-7, 4 inner verticals; 0-4, 2 outer verticals and 0-2, 1 postorbital. Clypeus with 4-7, 5 setae. Tentorium 109-148, 129 μm long, 15-25, 20 μm wide. Stipes 80-100, 90 μm long, 5-8, 6 μm wide. Palpomere lengths (in μm): 16-25, 20; 35-52, 41; 90-143, 114; 42-65, 57; 60-80, 71. L: 5th/3rd 0.76-0.80, 0.78. Third palpomere with apical digitiform projection.

Wing (Fig. 6). Anal lobe not developed. Coarse punctation easily visible at 40x magnification. VR 1.02-1.23, 1.17. Costa extension 115-143, 122 μm long. Brachiolum with 1 seate. R with 5-9, 7 setae. Remaining veins bare. Squama bare.

Thorax. Antepronotum with 2-5, 3 lateral setae. Dorsocentrals 8-10, 9; acrostichals 6-7, 7; prealars 2-4, 3. Scutellum with 3-7, 6 setae.

Legs (Fig. 7). Spur of fore tibia 40-58, 48 μm long; spurs of mid tibia 30-42, 38 μm and 21-32, 25 μm long; spurs of hind tibia 40-63, 52 μm and 21-32, 28 μm long. Lateral denticles appressed to main shaft. Mid tibial comb with 3-7, 5 spines; hind tibial comb with 9-14, 12 spines. Mid and hind legs without tarsal pseudospurs. Width at apex of fore tibia 35-45, 40 mm, of mid tibia 33-38, 36 mm, of hind tibia 40-48, 45 mm. Lengths (in μm) and proportions of legs in Table 3.

Hypopygium (Figs 8-9). Anal hyaline, slender with blunt apex, 40-55, 48 μm long, 15-20, 18 μm in width. Anal point length/width: 2.22-2.75, 2.51. Tergite IX with 6-13, 9 setae, laterosernite IX with 3-5, 4 setae. Phallapodeme 48-91, 77 μm long. Oral projection of transverse sternapodeme vestigial, 75-96, 85 μm long. Gonocoxite 170-221, 194 μm long. Gonostylus slightly curved, 80-101, 92 μm long. Megaseta 13-21, 18 μm long. Crista dorsalis absent. Inferior volsella bubble-shaped, 18-27, 22 μm long, with 8-12, 9 setae. Virga absent. HR 1.88-2.50, 2.08. HV 2.62-3.48, 3.02.

Type materials.

Holotype: ♂ (BDN. K7A22), China, Zhejiang Province: Taizhou City, Xianju County, Shenxianju Scenic Area, 28°42'14"N, 120°36'25"E, 14.iv.2011, Lin XL, sweeping net. Paratypes (5♂♂): 1♂, as Holotype; Sichuan Province: 4♂♂, Yajiang County, 30°01'52"N, 101°00'52"E, 10.vi.1996, 3050 meters above sea level, Wang XH, sweeping net.

Etymology.

Named in closing to the species Bryophaenocladius ictericus (Meigen, 1830).

Remarks.

The present new species resembles to Bryophaenocladius ictericus (Meigen, 1830) in the shape of inferior volsella, but it can be separated by following combination of characters in Table 4.

Female and immature stages unknown.

Distribution.

The species was found in Sichuan and Zhejiang Provinces (Oriental China).