Polypedilum (Collartomyia) baishanzuensis Song & Qi, 2021

Song, Chao, Zhu, Binqing, Liu, Wei & Qi, Xin, 2021, On the genus Polypedilum, subgenus Collartomyia, with description of P. (Col.) baishanzuensis sp. nov. from Baishanzu Nature Reserve, China (Diptera, Chironomidae), ZooKeys 1065, pp. 1-12 : 1

publication ID	https://dx.doi.org/10.3897/zookeys.1065.69870
publication LSID	lsid:zoobank.org:pub:72D58C2C-3BD7-45EA-BDDE-2D03B9EA4673
persistent identifier	https://treatment.plazi.org/id/F43550CB-6444-4F86-9F41-09D2121DD6C1
taxon LSID	lsid:zoobank.org:act:F43550CB-6444-4F86-9F41-09D2121DD6C1
treatment provided by	ZooKeys by Pensoft
scientific name	Polypedilum (Collartomyia) baishanzuensis Song & Qi
status	sp. nov.

Treatment

Polypedilum (Collartomyia) baishanzuensis Song & Qi sp. nov.

Figs 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4

Type material.

Holotype (BOLD & TZU sample ID: ZJCH193; Field ID: BSZ60) 1 ♂, China, Zhejiang Province, Lishui City, Qingyuan county, Baishanzu National Nature Reserve, 27.76°N, 119.31°E, 11.VIII.2020, Qi X., light trap.

The holotype is deposited in the collection of the College of Life Sciences, Taizhou University, Taizhou, China (TZU).

Diagnostic characters.

The male adult can be distinguished from other P. (Collartomyia) species by the following combination of characters: most of the body yellowish; wing with distinct spots on 70% of the proximal part; tarsomeres dark brown; tergite without dark brown band pigmentation; superior volsella with six inner basal setae and three outer lateral setae; dorsal side of inferior volsella with three distinct setiferous tubercles.

Etymology.

The specific name refers to the Baishanzu National Nature Reserve, where the holotype was collected.

Adult male (n = 1). Total length 4.40 mm; wing length 2.75 mm; total length / wing length 1.60; wing length / length of profemur 2.11.

Coloration (Fig. 2 View Figure 2 ). Head, thorax and abdomen yellowish; palpomeres dark brown to blackish; femur, tibia and tarsomeres ta1-ta5 of P1 blackish; tarsomeres ta1-ta5 of P2 dark brown; tarsomeres ta3-ta5 of P3 dark brown; gonocoxite and proximal half of gonostylus dark brown.

Head (Fig. 3B View Figure 3 ). Frontal tubercle absent. Antenna with 13 flagellomeres, ultimate flagellomere 480 µm long; AR 0.77. Temporal setae 16, including 8 inner verticals and 8 outer verticals; Clypeus with 57 setae; Palpomere lengths (in μm): 70, 95, 277, 145, 330. Length of 5th palpomere / 3rd palpomere 1.19.

Thorax. Dorsocentrals 50; acrostichals 8; prealars 16; scutellum with 39 setae.

Wing (Fig. 3A View Figure 3 ). VR 1.14; Brachiolum without setae; R with 32 setae; R1 with 44 setae; R4+5 with 69 setae; Squama with 33 setae. Anal lobe moderately developed.

Legs (Fig. 3C View Figure 3 ). Terminal scale of fore tibia pointed, 37 μm long. Spur of mid tibia 55 μm long including 32 tooth comb, unspurred comb with 33 teeth. Spur of hind tibia 65 μm long including 26 teeth, unspurred comb with 32 teeth. Lengths (in µm) and proportions of legs as in Table 2 View Table 2 .

Hypopygium (Figs 4 View Figure 4 - 5 View Figure 5 ). Basal part of abdominal segment VIII distinctly triangular and markedly pointed at base (Fig. 4A View Figure 4 , 4E View Figure 4 ). Anal tergite with 27 median setae, laterosternite with 5 setae; Anal tergite bands strongly developed and sclerotized, forming a circle completely surrounding median setae. Anal point (Fig. 4B View Figure 4 ) 125 μm long and 27.5 μm wide at base, 5 μm at apex; transverse sternapodeme 112 μm long, phallapodeme 175 μm long. Basal part of superior volsella (50 μm long and 50 μm wide) covered with microtrichia and with 6 long setae along inner base and one long seta on outer side; projecting part of superior volsella 105 μm long, with 2 long setae along the distal outer part (Fig. 4C View Figure 4 ). Inferior volsella (Fig. 4D View Figure 4 ) 217 μm long, with 3 tubercle-like projections with strong macrosetae. Gonostylus 262 μm long with macrosetae along distal inner margin. HR 1.0. HV 1.69.

Immatures and female unknown.

Ecology.

Material composed of male adults was light-trapped from stones and boulders in a flowing mountain stream (Fig. 6 View Figure 6 ), located at an altitude of 1,450 m.

Distribution.

Only known from the type locality in Zhejiang province, China.