Krenopelopia wangi Zhang & Lin, 2025

Krenopelopia wangi Zhang & Lin , sp. nov.

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( Figs 2–7 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 )

Type material. Holotype: male ( SHOU & BOLD sample ID: CHGLG41 ), China, Guizhou, Zunyi, Meitan, Guanlingou , 27.536569°N, 107.48617°E, 792 m a.s.l., Malaise trap, 8–12.VI.2020, leg. Hong-Die Li. GoogleMaps Paratypes: 1 male ( SHOU & BOLD sample ID: CHGLG42 ) and 3 females ( SHOU & BOLD sample ID: CHGLG54 , CHGLG63 , CHGLG64 ) same as holotype .

Etymology. The specific epithet is dedicated to Professor Xin-Hua Wang from Nankai University, Tianjin, China, for his outstanding contribution to the knowledge of Chironomidae . The noun in genitive case.

Diagnostic characters. The adult male of the new species can be distinguished from related species of the Krenopelopia by the following combination of characters: small body size; wing length = 1.42–1.56 mm; anterior third of tergites VI–VII dark brown; AR 1.17; fore tibial spur with three lateral teeth; mid tibial spurs with three and two lateral teeth, respectively; hind tibial spurs with three and two lateral teeth, respectively; front leg LR 0.82 and hind leg LR 0.86.

Description. Adult male (n = 2).

Total length 2.71–2.74 mm; wing length 1.42–1.56 mm; total length/wing length 1.76–1.91.

Colouration ( Figs 2A View FIGURE 2 , 3A, 3D, 3E View FIGURE 3 , 4A View FIGURE 4 ). Head, thorax and legs pale, eye black. Abdomen pale. Tergite VI–VII with horizontal dark brown speckle at the anterior half ( Fig. 4A View FIGURE 4 ).

Head ( Figs 3 View FIGURE 3 A-C). Antenna ( Fig. 3B View FIGURE 3 ) with 14 flagellomeres. AR 1.17 (n = 1). Apical segment ( Fig. 3C View FIGURE 3 ) cuneate with a single apical seta. Frontal tubercles 10–11 μm long, 9–10 μm wide at base. Temporal setae 12. Clypeus with 8 setae. Tentorium 164–167 μm long, 32–50 μm wide. Palpomere lengths (μm): 46–47; 58–59; 115–125; 134–139; 230–250.

Thorax ( Fig. 3D View FIGURE 3 ). Acrostichals and dorsocentrals irregularly biseriate, especially toward humerals. Ac 26–28; Dc 18–25; Pa 8; Scts 8 in arc and 4 anterior to those.

Wing ( Figs 3 View FIGURE 3 E-F). Strongly pubescent, r and cu bare. C slightly extended beyond R 4+5 ( Fig. 3E View FIGURE 3 ). R 2+3 distinct.

Legs ( Figs 4 View FIGURE 4 B-G). A single spur of fore tibia ( Figs 4 View FIGURE 4 B-C) 38 μm with 3 lateral teeth; two spurs of mid tibia ( Figs 4 View FIGURE 4 D-E) measuring 54 µm and 30 µm long, bearing 3 and 2 lateral teeth, respectively; two spurs of hid tibia ( Figs 4 View FIGURE 4 F-G) measuring 73 µm and 36 µm long, bearing 3 and 2 lateral teeth, respectively. Lengths and proportions of legs as in Table 2 View TABLE 2 .

Hypopygium ( Fig. 5 View FIGURE 5 ). Tergite IX with posterior row of 6 setae, Anal point short,13 μm long, base 23 μm wide, nearly imperceptible in paratype. Gonocoxite 152–169 μm long; 70–80 μm wide, a dense aggregation of microtrichia present on the medial side of the gonocoxite basally ( Fig. 5E View FIGURE 5 ), the ventral setae are predominantly concentrated on the posterior two-thirds. Gonostylus cylindrical, slightly widened basally, evenly tapered distally, weakly curved ventrally in distal quarter, 127–142 μm long; HR 1.19–1.20. Megaseta 13–14 μm long.

Adult female (n = 3).

Total length 1.43–1.84 mm; wing length 1.16–1.31 mm; total length/wing length 1.20–1.40.

Colouration ( Figs 2B View FIGURE 2 , 6A, 6 View FIGURE 6 C-D). Head, thorax and legs pale, eye black. Abdomen pale.

Head ( Figs 6 View FIGURE 6 A-B). AR 0.20.Antenna with 12 flagellomeres, ultimate flagellomere 102 μm long. Apical segment cuneate with a single seta.

Thorax ( Fig. 6C View FIGURE 6 ). Acrostichals and dorsocentrals irregularly biseriate, especially toward humerals. Ac 26–27; Dc 24–31; Pa 9–10; Scts 8 in arc and 4 anterior to those.

Wing ( Fig. 6D View FIGURE 6 ). Strongly pubescent, r bare. Apex of C about opposite of apex of M 1+2. R 2+3 distinct. Apex of costa about even with apex of M.

Legs. In several female specimens, the legs are incomplete. Lengths and proportions of partial segments as in Table 3 View TABLE 3 . Leg spurs as in male.

Genitalia ( Fig. 7 View FIGURE 7 ). Seminal capsules semi-circular, 39–47 μm long, 33–34 μm wide. Cercus 54–55 μm long, 22–29 μm wide, with 12–18 setae. Notum 96–117 μm long. Gonapophysis IX 160 μm long. Labium 36 μm long. Tergite IX 98μm long.

Larva and Pupa. Unknown.

Remarks. The adult male of the new species is shorter in body size and wing length, and has a higher front leg and hind leg LR compared to its congeners. It can be further distinguished from Krenopelopia alba , K. hudsoni , and K. batuensis by having the anterior third of tergites VI–VII dark brown. It differs from K. binotata by having lower AR of 1.17 (AR = 1.38 in K. binotata ). The new species is distinguished from K. narda by the latter possessing inner spurs on legs II and III, each with only one lateral tooth, and an AR of 1.34. Additionally, it differs from K. nigropunctata in the latter’s higher AR (1.43). The adult female of the new species differs from K. alba by having lower AR of 0.20 (AR = 0.30 [0.28–0.33] in K. alba ) and from K. hudsoni by having higher LR 1 of 0.78 (LR 1 = 0.70 in K. hudsoni ).

Ecological notes. The new species was collected from a rivulet with abundant vegetation, where the substrate consisted of smooth rocks ( Fig. 8 View FIGURE 8 ).

Distribution. China ( Guizhou).