Zelentsoviella jugorica, Krasheninnikov, 2019

Krasheninnikov, Andrey Borisovich, 2019, Zelentsoviella jugorica gen. nov, sp. nov., a new Orthocladiinae from Russian Arctic (Diptera, Chironomidae), Zootaxa 4585 (3), pp. 581-590 : 585-587

Zelentsoviella jugorica n. sp., Krasheninnikov

urn:lsid:zoobank.org:act:39A93A40-A4ED-453F-A8D5-FF5F7247CFF9

Material examined. Holotype, ♂, RUSSIA: Nenets Autonomous Okrug, Yugorsky Peninsula, cape Beliy Nos , lake (fig. 1), N 69,607361° E 60,211639° 6 m, 08.viii.2015, leg. Andrey B. Krasheninnikov (CCK).

Etymology. The name jugorica refers to the fact that this species was collected at Yugorsky Peninsula

Description. Adult male (n = 1)

Total length 2.2 mm, and abdomen 1.5 mm. Wing length 1.4 mm. Ratio total length/wing length 1.57.

Colour. Head and legs light brown; there are dark brown spots on the thorax in the area of MAII and Pe, in the middle and on the sides of mesonotum, in postnotum. I-V segments of the abdomen are dark brown, lateral-caudal corners on VI-VIII tergites have light areas.

Head (fig. 2). Eye bare, reniform, without dorsomedian extension. The flagellums are lost due to fixation of the specimen by pure ethanol. Temporal setae including 3 outer verticals. Clypeus with 7 setae. Tentorium 140 µm long, 20 µm wide. Palp consists of 4 segments. Palpomere lengths (in µm): 39; 74; 67; 78.

Wing (fig. 3). Wing with very faint punctation under high magnification.VR 1,25; R with 12–14, R 1 with 4–5, R 4+5 with 12–14 setae. Wing with obtuse anal lobe. Costa extending to apex of R 4+5 on 47 µm. R 4+5 ending distal to end of M 3+4. R 2+3 weak. Brachiolum with 1 seta, other veins and membrane bare. Squama with 2 setae.

Thorax (fig. 4). Antepronotum with 2 ventrolateral setae. Dorsocentrals 7–8, acrostichals 2 on mid-scutum, prealars 3. Scutellum with 4 setae.

Legs. Foretibia with 35 µm long spur; mid tibia with 24 µm and 20 µm long spurs; hind tibia with 35 µm and 16 µm long spurs. Hind tibial comb is partially reduced and consists of 6 weak setae (fig. 5). Sensillae chaetica present on ta 1 of each legs and pseudospurs absent. Pulvilli reduced, empodium present. Lengths (in µm) and proportions of legs in Table 2 .

Hypopygium (fig. 6–7). Laterosternite IX with 2-3 setae. Anal point strongly elevated above surface of tergite IX and located in its middle, with 13 setae, distally triangular, its visible part has a length of 40 µm. There is no clear distinction between tergite IX and proctiger. Virga absent. Transverse sternapodeme 86 µm long, straight, visible part of phallapodeme 65 µm long. Superior volsella collarlike. Dorsal part of inferior volsella obtuse with macrosetae and microsetae, ventral part rounded with microsetae only. Gonocoxite 230 µm long. Gonostylus 110 µm long, megaseta 7 µm long. HR 2.0 9. Gonostylus have very complex shape. The long part of the gonostylus is smoothly bent and gradually narrows to the apex, is covered with macrosetae and microsetae. Crista dorsalis absent. The additional part of the gonostylus has a pair of setae and has the shape of a palm with a bent thumb.

Female, pupa and larva. Unknown.

Distribution. The genus and species are known only from the typical habitat Yugorsky Peninsula, Russia.