Cladotanytarsus (Cladotanytarsus) sinjongensis Ree et Kim, 1988

Giłka, Wojciech & Gadawski, Piotr, 2022, Tanytarsini (Diptera: Chironomidae) collected during Polish expeditions to North Korea, Zootaxa 5214 (2), pp. 151-175 : 152

Cladotanytarsus (Cladotanytarsus) sinjongensis Ree et Kim, 1988

Cladotanytarsus sinjongensis Ree et Kim, 1988: 19 (male, fig. 4a–c; South Korea).

( Fig. 2A–D )

Material examined. Phjŏngjang, 18 July 1981, 32 males; Sokam, 8 July 1981, 1 male; leg. W. Krzemiński.

Remarks. A set of subtle morphological differences used in diagnostics, often overlapped by intraspecific variations, make the determination of adult males of Cladotanytarsus one of the most difficult within Tanytarsini and Chironomidae . Accurately mounted and illustrated specimens, their precise measurements and appropriate interpretation of diagnostic features are thus decisive. In fact, determination of Cladotanytarsus sinjongensis may be a challenge when based on the illustrated original description, although several crucial characters indicate that the specimens presently examined are conspecific with those described from South Korea ( Ree & Kim 1988). The males from North and South Korea compared here [data on the South Korean material, with remarks given in square brackets] are approximately of the same size, with the wing 1.18–1.45 mm long [1.2–1.3 mm], AR 0.90–1.03 [0.91–1.05], frontal tubercles 14–18 μm long [15–16 μm], similar lengths of palpomeres, leg ratios and the same body colouration. The hypopygial anal point is more or less lanceolate or tongue-shaped ( Fig. 2A, B ), 35–45 μm long [7–9 μm, inconsistency relative to the scaled fig. 4], the superior volsella is slender, narrowed at mid length, with the swollen and apically rounded distal part ( Fig. 2A, C ) [probably distorted during mounting], the stem of the median volsella is slightly curved, ~40 μm long [35–38 μm], with branched lamellae ( Fig. 2A, D ), as in all known Cladotanytarsus [the deep furcations overlooked].

Figures

FIGURE 2. Cladotanytarsus sinjongensis Ree et Kim, 1988, male. A: hypopygium; B: anal point, variations; C: superior volsella and digitus, variations; D: median volsella (B–D magnified × 1.5–2 relative to A).