Asiodonus lobanovi Legalov & Reshetnikov, 2020

Legalov, Andrei A. & Reshetnikov, Sergei V., 2020, Asiodonus lobanovi Legalov & Reshetnikov, a new species of the tribe Hyperini (Coleoptera: Curculionidae) from Altai (Western Siberia), Ecologica Montenegrina 36, pp. 46-52 : 48-51

Asiodonus lobanovi Legalov & Reshetnikov , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:8C00E428-64F3-4AA7-8656-CD2AA0990857

( Figs. 1, 2)

Type material: Holotype, male ( ISEA), RUSSIA, Altaiskii krai, eastern part of Tigiretsky mountain range, headwaters of Kytma river, 1900-2200 m, 50°49.5 'N, 83°55.2' E, 4.VII.2019, A.A. Gurina, R. Yu. and E. R. Dudko . Paratypes: 2 females ( ISEA), idem ; 1 male ( ISEA) , 4 males ( CSRN) , 1 female ( ISEA) , 10 females ( CSRN), Korgon mountain range , watershed of Kumir and Korgon rivers, headwaters of Antonov Korgon River, 27 km SW Ust-Kumir, 1900-2100 m, alpine meadow, 50°51.9 'N, 84°00.2' E, 3-4.VII. 2019, A.A. Gurina, R . Yu. and E. R . Dudko, S. V . Reshetnikov .

Description.

Body black, with densely quite wide scales bifid at apex, with weak metallic pink lustre. Scape partially redbrown.

Male: Rostrum quite long, weakly curved, without middle carina, sparsely punctate in basal and middle thirds, finely punctate at apex, 2.4-2.7 times as long as wide at apex, 2.5-3.0 times as long as wide in middle, 2.8-3.3 times as long as wide at base, 0.8-0.9 times as long as pronotum. Mandibles massive with two teeth on inner edge. Forehead weakly narrower than rostrum base width, flat, punctate. Eyes large, transversely oval, not protruding from contour of head. Temples short. Antennae inserted before apex of rostrum. Antennae long. Scapus long, not reaching eyes. Antennomeres 2 and 3 long conical. Antennomere 3 shorter and narrower than antennomere 2. Antennomeres 4 and 5 subconical. Antennomere 4 two times as short as antennomere 2. Antennomere 6 almost rounded. Antennomeres 7 and 8 almost conical. Antennomere 7 longer than antennomere 6. Antennomere 8 wider than antennomere 7. Club compact. Antennomere 9 shorter than antennomeres 7 and 8 combined. Antennomere 10 longer than antennomere 9. Antennomere 11 longer than antennomere 10. Pronotum 1.3-1.4 times as long as wide at apex, 0.8-0.9 times as long as wide in middle, 0.9-1.0 times as long as wide at base. Greatest width before apex. Disk densely punctate. Scutellum small, trapezoidal. Elytra oval, 2.1 times as long as wide at base, 1.6 times as long as wide in middle, 2.7-2.9 times as long as wide at apex, 2.8-3.2 times as long as pronotum. Humeri smoothed. Greatest width in middle. Interstriae quite wide, almost flat, finely punctate. Striae quite deep. Procoxal cavities rounded and contiguous. Precoxal portion of prosternum slightly shorter than postcoxal portion. Mesocoxal cavities narrowly separated. Metaventrite slightly shorter than abdominasl ventrite 1. Metanepisterna narrow, punctate. Abdomen weakly convex. Andominal ventrites 1 and 2 quite long, equal in length, fused, with slight depression in middle. Ventrite 1 subequal in length to metacoxal cavity. Ventrites 3 and 4 quite short, subequal in length. Ventrite 3 distinctly shorter than ventrite 2. Ventrite 5 long, as long as ventrites 4 and 5 combined. Pygidium completely covered by elytra. Legs long. Femora widened. Tibiae weakly biconcave, with apical comb of setae and mucro. Tarsi long. Tarsomeres 1-3 with pulvilli ventrally. Tarsomeres 1 and 2 wide-conical, flattened. Tarsomere 2 slightly shorter than tarsomere 1. Tarsomere 3 wide bilobed. Tarsomere 4 very short. Tarsomere 5 elongated. Claws long and free. Aedeagus distinctly pointed and curved ( Fig. 3). Length of body: 6.8-7.1 mm. Length of rostrum: 1.3-1.4 mm.

Female: Rostrum 2.5 times as long as wide at apex, 2.7-2.8 times as long as wide in middle, 2.6-2.7 times as long as wide at base, 0.8 times as long as pronotum. Pronotum 1.3 times as long as wide at apex, 0.8-1.0 times as long as wide in middle, 0.9 times as long as wide at base. Elytra wider, 1.9 times as long as wide at base, 15-1.6 times as long as wide in middle, 2.6-2.9 times as long as wide at apex, 3.1-3.4 times as long as pronotum. Abdomen convex. Ventrites 1 and 2 without depression in middle.

Length of body: 7.5-7.8 mm. Length of rostrum: 1.3-1.4 mm.

Differential diagnosis. The new species is similar to A. herteshensis from East Sayan Mountains but differs in the scapus not reaching eyes, wider elytral and pronotal scales bifid at apex, more elongated elytra, narrower rostrum, partially reddish-brown antennae, distinctly pointed and curved aedeagus. It differs from Asiodonus opanassenkoi (Legalov, 1997) in the body covered with scales, larger body sizes, and long aedeagus with elongated apex.

Etymology. The species is named in honor of the late Dr. A.L. Lobanov (Zoological Institute RAS, Saint-Petersburg, Russia).

Distribution. The new species are described from the Korgon mountain range, Altai Mountains ( Figure 3), while a species closely related to it lives on the Akademika Obrucheva Mts, East Sayan Mountains ( Figure 3).

Remarks. The new species occurs in mountain meadows ( Figure 4) and was found on Hedysarum coronarium L. ( Figure 5). Asiodonus opanassenkoi , Donus cupreus (Legalov, 1997) , D. lepidus (Capiomont, 1868) and Boreohypera kirejtshuki Legalov, 2011 from Hyperini were collected together with the new species.