Monodiamesa nitida (Kieffer)

Makarchenko, Eugenyi A. & Semenchenko, Alexander A., 2023, Review of subfamily Prodiamesinae (Diptera: Chironomidae) from the Russian Far East and bordering territory, Zootaxa 5323 (1), pp. 1-26 : 8-9

Monodiamesa nitida (Kieffer)

( Figs. 15–16 )

Prodiamesa nitida Kieffer, 1918: 102, 1919: 133 ; Pagast 1947: 500.

Monodiamesa nitida (Kieffer) ; Goetghebuer 1939: 4; Brundin 1952: 51; Saether 1973: 675; Makarchenko 1985: 103, 2006: 279; Ashe & O’Connor 2009: 324; Krasheninnikov & Bogomolova 2017: 86.

Material examined. Russia: 1 adult male, Russian Far East, Magadan Region, Tenkinskyi District, Sibit-Tyellakh Village , Olen Stream , Kolyma River basin, 61.947262 N, 149.613585 E, 1. VII.1977, leg. E. Makarchenko. 1 adult male, the same data, except Ozernyi Stream, 25. VIII.1977, leg. E. Makarchenko; 2 adult male, Sakhalin Island, Noglicki District, Rybnoye Lake , about 3 km from Val Village , 52.356233 N, 143.002979 E, 4. VIII.2003, leg. E. Makarchenko; 5 adult males, Sakhalin Island, Okha District, Ossoi River ( Chaivo Bay basin), 19. VIII.2001, leg. T. Tiunova .

Comments. Some variation is added based on the males from the Russian Far East.

Description

Adult male (n = 4). Total length 3.6–4.0 mm. Total length/wing length 0.92–1.44.

Coloration. Brown to dark brown,

Head. Eyes bare, with long parallel-sided dorsomedial extention. Temporal setae including 4 coronals, 8 verticals and 5–6 postorbitals. Clypeus with 8 setae. Antenna with 13 flagellomeres and developed plume; AR 1.5–2.1. Palpomeres lengths (in μm): 41; 76–101; 147–172; 126–155; 176–185. Palpomeres 1–5 length/head width 0.90–0.96.

Thorax. Antepronotum with 5 lateral setae. Acrostichals absent, dorsocentrals 9–11, prealars 6, scutellars ca 20.

Wing. Length 2.7–3.9 mm, width 0.7–0.73 mm. R and R 1 with 9–12; R 4+5 with 2 setae in distal part. RM length/ MCu length 0.95. Anal lobe developed, outline rounded. Squama with 27–32 setae.

Legs. Spur of fore tibia 75 μm long; spurs of mid tibia 55 μm and 50 μm; of hind tibia 80 μm and 50 μm long. Hind tibial comb with 11–14 setae. Lengths and proportions of leg segments as in Table 5.

Hypopygium ( Figs. 15–16 ). Tergite IX with anal point, 60–76 μm long, in basal part with 6–11 short setae. Laterosternite IX with 7–11 setae. Gonostylus 116–148 μm long, slightly curved and covered with short setae, with megaseta 16–20 μm long and 1–2 setae nearest, 14–20 μm long. Gonocoxite 328–344 μm long. Superior volsella 60–96 μm long, with a wide basal part and narrow distal part. Median volsella seta-like on pedestal, 80–100 μm long, pedestal length 32–36 μm. Inferior volsella 196–200 μm, 1.3–1.5 times as long as gonostylus, but not reaching distal apex of gonocoxite. HR 2.22–2.53.

Distribution. Known from Europe, North Ural (Pechora River) and Russian Far East (Chukotka, Kolyma River basin, Kurile and Sakhalin Islands). Inhabitant of oligotrophic lakes.

Figures

FIGURES 13–16. Adult males of Monodiamesa improvisa Makarchenko (13–14) and M. nitida Kieffer (15–16). 13, 15, hypopygium in dorsal view; 14, 16, hypopygium in ventral view.