Paracladopelma binum, Yan, Chuncai, Jin, Zhaohui & Wang, Xinhua, 2008

Yan, Chuncai, Jin, Zhaohui & Wang, Xinhua, 2008, Paracladopelma Harnisch from the Sino-Indian Region (Diptera: Chironomidae), Zootaxa 1934, pp. 1-29 : 5-7

Paracladopelma binum sp. n.

( Figs 3–8 )

Type material: Holotype male (BDN no. 09273). CHINA: Shaanxi Province, Ankang City, Ningshan County, Xunyangba Town, 16.vii.1994, light trap, W. Bu.

Diagnostic characters. The species differs from other Paracladopelma species in having a bilobed inferior volsella, and anal tergite bands separated medially.

Etymology. From Latin binus, two, referring to the inferior volsella with two lobes.

Male (n = 1). Total length 3.50 mm. Wing length 1.75 mm. Total length / wing length 2.00. Wing length / length of profemur 2.16.

Coloration. Thorax yellowish brown, with vittae slightly darker brown, mid preepisternum, median anepisternum, and anterior half of postnotum dark brown. Apex of femur and entire tibiae of foreleg dark brown, remainder yellowish green, tarsi broken; mid- and hind legs yellowish green, with distal 1/6 of femur, basal 1/ 6 of tibia, distal 1/3 of ta3, and entire ta4 and ta5 dark brown. Abdomen pale yellowish, with tergite VIII and hypopygium brown.

Head. AR 1.63. Ultimate flagellomere 650 Μm long. Frontal tubercles rounded, 8 Μm in diameter. Temporal 14 setae including 3 inner verticals, 9 outer verticals and 2 postorbitals. Clypeus with 9 setae. Tentorium 110 Μm long, 26 Μm wide. Palpomere lengths (in Μm): 32, 40, 113, 140, 215. Palpomere 5/3 1.90.

Thorax. Antepronotals 6, dorsocentrals 8, acrostichals 9, prealars 3. Scutellum with 7 setae.

Wing ( Fig. 3 ). VR 1.23. Brachiolum with 2 setae, R with 12, R1 with 2 at apex, R4+5 with 20 setae. Squama with 1 seta.

Legs. Froretibia with 2 subapical setae, 93 Μm and 106 Μm long; spurs of midtibia 20 Μm and 25 Μm long, comb with 22 teeth, 8 Μm long; spurs of hind tibia 23 Μm and 25 Μm long, comb with 38 teeth, 10 Μm long. Mid ta1 with 3 sensilla chaetica, hind ta1 with 1 sensilla chaetica. Lengths and proportions of legs as in Table 1 .

Hypopygium ( Figs 4–8 ). Anal point narrowest medially, with rounded apex, 46 Μm long, 5 Μm wide medially, 10 Μm wide at apex. Tergite IX with 10 setae at base of anal point. Laterosternite IX with 2 setae. Anal tergite bands separated medially. Phallapodeme 63 Μm long. Transverse sternapodeme 37 Μm long. Superior volsella ( Figs 6–7 ) weakly divided into dorsal and ventral lobes, with13 setae, covered with microtrichia on both dorsal and ventral surfaces. Inferior volsella ( Fig. 8 ) with two rounded, medially fused lobes, covered with microtrichia. Gonocoxite 88 Μm long, inner margin with 3 strong setae. Gonostylus 175 Μm long, widest medially, with weak longitudinal keel. HR 0.50, HV 2.00.

Distribution. The species was collected in southern Shaanxi Province, China.

Figures

FIGURES 3 – 8. Paracladopelma binum sp. n., male. 3 - wing; 4 - hypopygium, dorsal view; 5 - hypopygium, ventral view; 6 - superior volsella, dorsal view; 7 - superior volsella, ventral view; 8 - inferior volsella.