Polypedilum (Pentapedilum) longisetum Moubayed

Oyewo, Emmanuel Adeoye & Saether, Ole A., 2008, Revision of Polypedilum (Pentapedilum) Kieffer and Ainuyusurika Sasa et Shirasaki (Diptera: Chironomidae), Zootaxa 1953, pp. 1-145 : 74

Polypedilum (Pentapedilum) longisetum Moubayed

( Fig. 23)

Polypedilum (Pentapedilum) longisetum Moubayed, 1992: 197 .

Material examined. LEBANON: Jib-Jannin , Litani River, holotype male, 16.v.1982, J. Moubayed ( ZSM) .

Diagnostic characters. The male can be separated from other species with numerous setae on the wing membrane, uniformly colored abdomen, foretibial scale with spur, base of superior volsella bare and projection curved, by having the seta on the superior volsella projection placed close to base, inferior volsella apically clubbed, and wing cell m basal of RM with 40 macrotrichia. The species is very similar to P. (Pe.) scirpicola which, however, does not have a clubbed inferior volsella and more numerous setae basally on the wing.

Male (n = 1)

Total length not measurable. Wing length / length of profemur 2.26. Thorax, abdomen, femur, tibia and tarsi brown.

Head ( Fig. 23B). AR 1.89. Ultimate flagellomere 645 µm. Temporal setae 11 including 5 inner verticals, 4 outer verticals, and 2 postorbitals. Clypeus with 20 setae. Palpomere lengths (in µm): 33, 57, palpomeres 3– 5 lacking.

Thorax. Acrostichals 20, dorsocentrals 24, prealars not discernible. Scutellum with 7 setae.

Wing ( Fig. 23A). Anal lobe well developed. VR 1.13. Brachiolum with 3 setae, Sc with 20, R with 44, R 1 with 33, R 4+5 with 84, M with 6, RM with 4, M 1+2 with 57, M 3+4 with 32, Cu with 35, Cu 1 with 22, PCu with 29, An with 28 setae. Cell m basal of RM with 38 macrotrichia, cells r 4+5, m 1+2, m 3+4, and an plus cu each with more than 100 macrotrichia. Squama with 9 setae.

Legs. Scale on foretibia ( Fig. 23C) 31 µm long, with 14 µm long apical spur. Spurs on midtibia 60 µm long, on hind tibia 67 µm long. Comb on midtibia ( Fig. 23D) 26 µm long, combs on hind tibia ( Fig. 23E) 29 µm and 24 µm long. Width at apex of foretibia 65 µm, of midtibia 67 µm, of hind tibia 71 µm. Length and proportions of legs as in Table 27.

Hypopygium ( Figs 23E). Tergite IX with 14 median setae, laterosternite IX with 2 setae. Anal point 62 µm long, 7 µm wide at base, gradually tapering to nearly parallel-sided towards 4 µm wide apex. Transverse sternapodeme 64 µm long; phallapodeme 81 µm long. Gonocoxite 169 µm long. Superior volsella ( Fig. 23F) 90 µm long, base bare with 3–5 inner base setae, projection nearly parallel-sided, with 1 lateral seta. Inferior volsella ( Fig. 23G) 100 µm long, broad at mid section, with prominent apical seta. Gonostylus 157 µm long. HR 1.08.

Distribution. Known only from Lebanon.