Makarchenkoia samoyedica Krasheninnikov, 2024

Krasheninnikov, Andrey B. & Vshivkova, Kristina A., 2024, Makarchenkoia gen. nov., a new genus of Orthocladiinae (Diptera, Chironomidae) from Arctic, Zootaxa 5551 (2), pp. 387-393 : 389-391

Makarchenkoia samoyedica Krasheninnikov , sp. nov.

http://zoobank.org/NomenclaturalActs/ B4BBF610-7856-4C63-8D33-94577A51B6FA

( Figs. 1–9 )

Type material. Holotype, ♂, RUSSIA: Nenets Autonomous Okrug, Yugorsky Peninsula, Pay-Khoy Range , upper reaches of the Peyumtiryaha River , N 69,462333º E 62,069833º 226 m, 20.vii.2013, leg. Andrey B. Krasheninnikov (CCK) . Paratypes, ♂, RUSSIA: Nenets Autonomous Okrug, Yugorsky Peninsula, Pay-Khoy Range , unnamed stream, tributary of the Peschanaya River near its mouth, N 69,745056 º E 61,812861º 9 m, 16.vii.2013, Andrey B. Krasheninnikov (CCK) ; ♂, unnamed lake near the Amderma Village , N 69,744944º E 61,700833º 29 m, 26.vii.2013, leg. Andrey B. Krasheninnikov (CCK) ; ♂, Tarepatayakha River , N 69,527667º E 61,867806 º 81 m, 19.vii.2013, leg. Andrey B. Krasheninnikov (CCK) .

Other material, 12♂, RUSSIA: Yamalo-Nenets Autonomous Okrug, Payutayaha River , N 68,23109º E 69,15675º, 7.vii.2016, leg. Evgenia P. Vyguzova ; ♂, RUSSIA: Payutayaha River , N 68, 22738º E 69, 18784º, 11.vii.2016, leg. Evgenia P. Vyguzova ; ♂, RUSSIA: Western Taimyr, Pyasina River middle flow, 6 km north of River Tareya mouth, stream valley, overgrowth of Arctophila fulva , N 73.253389° E 90.596806, 1.viii.2010, leg. Olga L. Makarova.

Derivatio nominis. The species is named in honor of samoyedic peoples (another name for the Nenets).

Description. Adult male (n = 3).Total length 2.3–2.5 mm, and abdomen 1.5–1.7 mm. Wing length 1.2–1.3 mm. Total length/wing length 1.86–2.03. Head, thorax, abdomen and legs light brown.

Head ( Fig. 1 ). Eye bare, reniform, without dorsomedial extension. Head width 346–354 μm. Antenna with partly reduced plume, AR 0.54–0.72, flagellum length 530–630 μm. Apex of antenna without apical or subapical seta. Temporal setae including 1–2 inner verticals, 2 outer verticals and 2 postorbitals. Clypeus with 6–7 setae. Palp consists of 5 segments. Palpomere lengths (in μm): 21–27; 31–41; 60–79; 53–66; 86–104.

Wing ( Fig. 4 ). Wing with punctation under ×400 magnification. R with 5–7, R 1 and R 4+5 without setae. Anal lobe reduced. Costa extending to apex of R 4+5 on 42–67 μm. R 4+5 ending distal to end of M 3+4. R 2+3 weak. FCu distal to FR. Brachiolum, other veins and membrane bare. Squama without setae.

Thorax ( Fig. 2 ). Antepronotum with 0–2 ventrolateral setae. Dorsocentrals 2–6, acrostichals 15–17 (begin at the border with antepronotum, hooked, single-row near the pronotum, double-row closer to the middle of the mesonotum), prealars 2–3. Scutellum with 4–5 setae.

Legs. Foretibia with 28–30 μm long spur; mid tibia with 14–16 μm and 14–15 μm long spurs; hind tibia with 33–42 μm and 13–15 μm long spurs. Hind tibial comb consists of 9–11 setae ( Fig. 3 ). Pseudospurs abresent. Pulvilli reduced, empodium present. Lengths (in μm) and proportions of legs in Table 1 . Lateral spines on spurs of mid and hind legs appressed to shaft of spur.

Hypopygium ( Figs. 5–9 ). Laterosternite IX with 7–9 setae. Tergite IX with 15–19 setae on sides of anal point base. Anal point part protruding beyond tergite IX on 82–94 µm. Tergite IX is densely covered with spinous microtrichia. Anal point is naked, microtrichia are located only at its base, but 0–2 setae are located laterally. At the top, anal point sharply thins without changing its width. Virga 30–32 μm long, weak. Transverse sternapodeme 80–83 μm long, convex, phallapodeme 126 μm long. Gonocoxite with a relatively well-developed rounded or rectangular superior volsella covered short setae. Inferior volsella consists of a dorsal part in the form of a small protrusion and a ventral part in the form of a cushion, densely covered with short setae. Gonocoxite 211–227 μm long. Gonostylus 116–132 μm long, megaseta 9–16 μm long. Gonostylus is sickle-shaped, narrowing towards the apex, and has an angular protrusion in its middle inner part. HR 1.71–1.87.

Female, pupa and larva. Unknown.

Diagnostic characters. The new species is similar to Makarchenkoia nudisquama ( Makarchenko et Makarchenko, 2003) , comb. n. but differs from it in the structure of the gonostylus.

Distribution. The species are known from Yugorsky, Yamal, the Taimyr Peninsulas of Arctic region.

Ecology. All adult collections are confined to the neighborhood of lotic waters (most of them) and a small lake, and carried out in July and the first half of August. Together with the new species in the Peyumtiryaha river there are Trichotanypus christmasus Makarchenko, 1983 , Diamesa cinerella Meigen, 1835 , Sympotthastia fulva (Johannsen, 1921) , Cricotopus (s. str.) cf. tibialis (Meigen, 1804), Orthocladius (s. str.) decoratus (Holmgren, 1869) , O. (s. str.) oblidens (Walker, 1856) , Micropsectra logani (Johannsen, 1928) .

In the unnamed stream, tributary of the Peschanaya River near its mouth there are T. christmasus , Allocladius nanseni (Kieffer, 1926) , Cricotopus (s. str.) polaris Kieffer, 1926 , Diplocladius cultriger Kieffer, 1908 , Hydrobaenus birulyai Krasheninnikov, 2022 , H. laticaudus Saether, 1976 , H. pilipodex Saether, 1976 , Limnophyes brachytomus ( Kieffer, 1922) , L. natalensis (Kieffer, 1914) , Orthocladius (Eudactylocladius) olivaceus (Kieffer, 1911) , Paraphaenocladius intercedens Brundin, 1947 , Parasmittia carinata Strenzke, 1950 , Rheocricotopus (s. str.) gavriloae Krasheninnikov, 2015 , Tokunagaia rectangularis (Goetghebuer, 1940) , Constempellina brevicosta (Edwards, 1937) .

In the Tarepatayakha River there are S. fulva , Cricotopus (s. str.) flavocinctus (Kieffer, 1924) , Orthocladius (Eudactylocladius) subletteorum Cranston, 1999 . In the unnamed lake near the Amderma village there are Procladius sp. , Cricotopus sp. , L. brachytomus , L. margaretae , Paraphaenocladius impensus (Walker, 1856) , P. intercedens , Psectrocladius sp. , Tanytarsus bathophilus Kieffer, 1911 , T. heliomesonyctios Langton, 1999 .

In the Payutayaha River there are Limnophyes okhotensis Makarchenko et Makarchenko, 2003 , Metriocnemus (s. str.) albolineatus (Meigen, 1818) , Parakiefferiella bilobata Tuiskunen, 1986 , P. impensus , C. brevicosta , Stempellinella edwardsi Spies et Saether, 2004 . In the Pyasina River there are M. (s. str.) albolineatus , M. (s. str.) sternerectus , Paraphaenocladius impensus , Rh. (s. str.) gavriloae .

Figures

FIGURES 1–5. Details of the structure of Makarchenkoia samoyedica sp. nov., 1: head; 2: thorax, lateral view; 3: large spur and tibial comb of hind tibia; 4: wing; 5: anal point, lateral view.

FIGURES 6–9. Details of the structure of Makarchenkoia samoyedica sp. nov., 6, 9, hypopygium,dorsal view; 7, 8, hypopygium, ventral view.