Polypedilum (Uresipedilum) bullum Zhang & Wang 2004, sp. n.
Creators: name: Zhang, Ruilei
name: Wang, Xinhua
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Polypedilum
Polypedilum bullum

description: Polypedilum (Uresipedilum) bullum sp. n.
(Fig. 3)
Type material: Holotype male (BDN No. 13415): CHINA: Sichuan Province, Xiangcheng County, Shuoqu River, 12, 2700m, 12. VI. 1996, X. Wang.
Etymology: From Latin bulla, knob, refers to a prominent knob at the base of the superior volsella, which is unusual in the subgenus.
Diagnostic characters: Differs from the other species of the subgenus in having a prominent inner process basally on the superior volsella, wing with weak markings, and inferior volsella apically divided into two lobes.
Male imago (n = 1)
Total length 4.00 mm. Wing length 2.65 mm. Total length/ wing length1.51. Wing length /length of profemur 2.58.
Coloration. Head brown. Thorax brown with darker vittae and postnotum. Abdomen and legs brown. Wings brown with weak marking.
Head. AR 1.24. Ultimate flagellomere 662 m long. Temporal setae 12; including 3 inner verticals; 5 outer verticals and 4 postorbitals. Clypeus with 15 setae. Tentorium 159 m long, 47 m wide. Stipes 169 m long. Palpomere lengths (in m): 44, 47, 177, 172, 292.
Wing (Fig. 3A). VR 1.10. Brachiolum with 1 seta, R with 22; R 1 with 14; R 4+5 with 27. R 2+3 near to R 1. Squama with 15 setae. Wing with weak markings.
Thorax. Dorsocentrals 22; acrostichals 15, biserial; prealars 5. Scutellum with 22 setae.
Legs. Terminal scale (Fig. 3B) of front tibia pointed, 52 m long including 16 m long apical spine; spur on median tibiae 42 µm long including 29 m long comb, un­spurred comb 23 m long, spur on posterior tibia 47 m long including 31 m long comb, unspurred comb 23 m long. Width at apex of front tibia 56 m, of middle tibia 60 m, of hind tibia 65 m. Lengths (in m) and proportions of legs (Table 3):
Hypopygium (Figs. 3C–E). Anal tergite bands fused basal to median anal tergite setae. Anal tergite with 10 median setae, laterosternite with 3 setae. Anal point 94 m long, slender and parallel­sided for entire length, ventrally bent at apex. Phallapodeme 117 m long; transverse sternapodeme 70 m long. Gonocoxite 198 m long. Superior volsella 52 m long, base not produced caudally with microtrichiae and 12 long apical setae, a prominent process bearing 12 inner setae basely present in the inner margin of the base; apicomedial projection slender and rounded at apex. Inferior volsella 143 m long; apically divided into 2 lobes, with 12 oral setae and long apical seta respectively. Gonostylus 140 m long, outer margin convex widest in the middle. HR 1.41. HV 2.85.
Distribution: The species was collected by light trap near a river in the Sichuan Province in the Oriental Region.
Remarks: In the examined specimen, the prominent inner process of one superior volsella bears one seta, while the other has two setae; the base of one of the superior volsellae one apical seta, the other two apical setae. In the subgenus, only one species, P. (U.) simantokeleum Sasa has a superior volsella with an inner basal process, but that species is distinctly differing from the new species in several other features.
description: Published as part of Zhang, Ruilei & Wang, Xinhua, 2004, Polypedilum (Uresipedilum) Oyewo and Saether from China (Diptera: Chironomidae), pp. 1-38 in Zootaxa 565 (1) on pages 7-9, DOI: 10.11646/zootaxa.565.1.1, http://zenodo.org/record/5030339