Polypedilum (Uresipedilum) paraconvictum Yamamoto, Yamamoto & Hirowatari

Yan, Chuncai, Song, Chao, Liu, Ting, Zhao, Guangjun, Hou, Ziyuan, Cao, Wei & Wang, Xinhua, 2017, Two new and one newly recorded species of Polypedilum Kieffer 1912 with DNA barcodes from Oriental China (Chironomidae: Diptera), Zootaxa 4238 (1), pp. 109-118 : 115-116

Polypedilum (Uresipedilum) paraconvictum Yamamoto, Yamamoto & Hirowatari

( Figure 5A–D , GenBank accession number KY570295 )

Polypedilum (Uresipedilum) paraconvictum Yamamoto, Yamamoto & Hirowatari, 2015: 53 .

Material examined. 1 Ƌ, China: Hainan Province, Jianfengling National Nature Reserve , 109.67°N, 18.29°E, 16. III. 2016, Song C, light trap.

Description. Male adult (n = 1). Total length 2.51 mm. Wing length 1.63 mm. Wing length/length of profemur 2.01.

Coloration. Head pale brown, with brown antennal flagellums; Thorax light brown, Legs yellowish except tibia pale brown. Abdomen yellow ( Figure 5A ).

Head. Frontal tubercles absent. AR 1.34. Ultimate flagellomere 495 µm long; Temporal setae 9 including 3 outer verticals, 4 inner verticals and 2 postorbitals; Clypeus with 13 setae; Tentorium 102 µm long, 25 µm wide. Palpomere lengths (in µm): 25; 32; 3rd–5th absent.

Thorax. Dorsocentrals 13, including 3 humerals; acrostichals 9; prealars 3. Scutellum with 14 setae.

Wing. VR 1.30. R2+3 adjacent to R1. R with 20, R1 with 12, R4+5 with 26 setae. Brachiolum without seta. Squama with 5 setae.

Legs. Scale of fore tibia triangular, rounded, without apical short spur. Spur on median tibia 37 µm long, comb including 20 lateral teeth; un-spurred comb including 24 lateral teeth; spur on posterior tibia 40 µm long, comb including 16 lateral teeth, un-spurred comb including 16 lateral teeth. Lengths (in µm) and proportions of legs as in Table 3.

Fe Ti Ta1 Ta2 Ta3 Ta4 P1 8 0 0 5 5 0 - - - -

P2 810 645 355 205 150 95 P3 890 720 510 290 290 175

Ta5 W.Ti BR LR BV SV P1 - 4 4 - - - -

P2 60 45 5.12 0.55 3.55 4.10 P3 75 45 3.80 0.71 2.55 3.16 Hypopygium ( Figures 5B–D ). Tergite IX with 5 median setae and laterosternite IX with 4 setae respectively. Anal point 30 µm long, parallel-sided with 5 µm wide in base, 2.5 µm wide at apex. Base of superior volsella, 25 µm long covered with microtrichiae, with 3 subapical inner setae and 1 apical out seta; apical projection, 26 µm long, nearly as long as basal portion, microtrichia-free and deeply curved ( Figure 5D ); Inferior volsella 72 µm long, with 6 dorsal setae. Phallapodeme 51 µm long; transverse sternapodeme 50 µm long. Gonocoxite 127 µm long. Gonostylus 125 µm long, semilunar like, with one apical seta and 6 setae on inner margin. HR 1.04. HV 1.97.

Remarks. The comparisons between Chinese specimen and Japanese ( Table 4 ) show most of characters are very close. Comparatively, Antenna Ratio of Chinese specimen is a little higher (1.34 vs 0.97–1.05); length of leg segments are larger than that of Japanese ( Table 4 ).

The species is very close to Polypedilum (Uresipedilum) oresitrophum ( Skuse, 1889) . It can morphologically distinguished from the latter ( Saether et Oyewo 2008: Fig 10E) by having microtrichia-free projection of superior volsella and a higher AR (0.6 in P. (U.) oresitrophum ).

Distribution. The species was erected by Yamamoto et al., 2015 based on the specimen from Japan (Yaeyama Islands, Okinawa). Chinese material was collected in Hainan Island (Oriental China).

Figures

FIGURE 5 A – D. P. (U.) paraconvictum Yamamoto, Yamamoto & Hirowatari. A—Body in ventral view; B—Dorsal view of hypopygium; C—Ventral view of hypopygium; D—Superior volsella.