Corynoneura sikhotealinensis Makarchenko et Makarchenko, 2019

Makarchenko, Eugenyi A. Makarchenko Marina A. & Semenchenko, Alexander A., 2019, Towards the taxonomy of Corynoneura Winnertz (Diptera: Chironomidae: Orthocladiinae) from the Russian Far East and Eastern Siberia, Zootaxa 4612 (2), pp. 221-236 : 227-228

Corynoneura sikhotealinensis Makarchenko et Makarchenko , sp. nov.

( Figs. 24–26 )

urn:lsid:zoobank.org:act:21CCBA5A-45D4-4803-8308-7613D380C05E

Type material. Holotype: adult male, Russian Far East , Primorye Territory , Terneiskyi District , Sikhote-Alin Biosphere Nature Reserve, Verkhnee Lake, 25.VII.2004, leg. O. Zorina. Paratypes: 1 adult male, same data as holotype except, 17.VIII.2007, leg. O. Zorina ; 1 adult male, same data as holotype except, Dlinnoe Lake , 25.VII.2007, leg. O. Zorina.

Adult male (n = 3). Total length 1.05–1.40 mm. Total length/wing length 1.49–1.88. Total coloration brown, tergites VI–VIII with light areas near top.

Head. Eye bare but front part pubescent. Clypeus with 7–9 setae. Antenna with 10 flagellomeres and well-developed plume; ultimate flagellomere 192–208 µm long, with short sensilla chaetica reaching to apex; AR 0.68–0.76. Length of 2–5 palpomeres (in µm): 16–18, 22–24, 32–36, 52–56.

Thorax. Antepronotum with 0–1 lateral setae; dorsocentrals 4–6; prealars 2; scutellars 2.

Wing. Typical of the genus. Length 0.72–0.94 mm.

Legs. Fore leg trochanter with dorsal keel. Spur of fore leg tibia 24 µm long, spurs of mid leg tibia 8–12 µm long, spur of hind leg tibia 32 µm long. Hind leg tibia with comb of 14–18 setae plus single strongly hooked apical seta; a/d=1.8–2.6; b/d=1.8–2.0. Lengths and proportions of leg segments as in Table 3.

Hypopygium ( Figs. 24–26 ). Tergite IX with 1–4 setae on each side; laterosternite IX with 2–3 setae. Sternapodeme inverted V-shaped. Phallapodeme high, connected to sternapodeme by “lock”. Gonocoxite 80–88µm long; inferior volsella absent; superior volsella triangular or rounded triangular, without setae. Gonostylus 20–32 µm long, basally with inner lobe, megaseta 4–8 µm long.

Diagnosis. The adult male of C. sikhotealinensis is most closely related to C. scutellata and C. arctica , but can separated from the first species by the lack of inferior volsella and the presence of the rounded-triangular superior volsella, and from the second species by the S-shaped apical seta of hind leg tibia and the shape of superior volsella ( C. arctica with the straight or slightly curved apical seta of hind leg tibia and with the angular superior volsella).

Figures

FIGURES 24–29. Adult males of Corynoneura sikhotealinensis sp. nov. (24–26), C. fujiundecima Sasa (27–28) and Corynoneura sp. (29). 24, 28–29, hypopygium in dorsal view; 25–26, gonocoxite and gonostylus; 27, apex of hind leg tibia. Tr—“trunnion”. Scale bars 20 µm.