Asiodonus vladimiri Legalov, 2022

Legalov, Andrei A., 2022, A new species of the genus Asiodonus Legalov, 2010 (Coleoptera: Curculionidae) from Amurskaya Oblast and Khabarovskii Krai (Russia, Far East), Ecologica Montenegrina 51, pp. 19-24 : 20-22

Species: Asiodonus vladimiri Legalov , sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:FA050258-DE36-4229-B20C-D8BA9A6BEB08

( Figs. 1-2 )

Type material: Holotype, male ( ISEA), RUSSIA, Bolshekhekhtsirsky Nature Reserve , 48° 09' N 135° 07' 10-40" E, 22.VI.2021, V.V. Dubatolov . Paratype: male ( ZIN), Amurskaya Oblast, 40 km W of Svobodny, Klimoutsy , water meadow, 8.VI.1959, L. Zinoviev .

Description. Male: Body black, covered with sparse slightly dissected apically scales and narrow scales. Antennae, mucro, and tarsal claws brownish.

Rostrum quite snort, almost straight, densely punctate in basal and middle thirds, weakly punctate at apex, 2.1-2.3 times as long as wide at apex, 2.3-2.4 times as long as wide in middle, 2.0-2.3 times as long as wide at base, 0.7 times as short as pronotum. Mandibles massive. Forehead about 0.7 times as long as rostrum base width, weakly impressed, densely punctate. Eyes large, finely faceted, transversely oval, weakly convex. Temples short, shorter than length of eye. Antennae inserted before apex of rostrum. Antennae long. Scapus long, 5.4 times as long as wide at apex, reaching eyes. Antennomeres 2 and 3 long-conical. Antennomere 2 about 2.2 times as long as wide, 0.3 times as long as and about 0.8 times as narrow as antennomere 1. Antennomere 3 2.2 times as long as wide, slightly shorter and 0.9 times as narrow as antennomere 2. Antennomeres 4 and 5 conical. Antennomere 4 about 1.3 times as long as wide, about 0.5 times as long as and 0.8 times as narrow as antennomere 3. Antennomere 5 equal in length and width, 0.9 times as long as and about 1.1 times as wide as antennomere 3. Antennomeres 5-7 equal in length. Antennomeres 6 and 7 almost rounded. Antennomere 6 about 0.9 times as long as wide, about 0.9 times as long as antennomere 5. Antennomere 7 equal to antennomere 6. Antennomere 8 wide-conical, about 0.8 times as long as wide, about 1.1 times as long as and about 1.2 times as wide as antennomere 7. Club compact, about 0.5 times as long as antennomeres 2-8 combined. Antennomere 9 about 0.9 times as long as wide, about 1.3 times as long as and about 1.3 times as wide as antennomere 8. Antennomere 10 about 0.8 times as long as wide, equal in length to and about 1.1 times as wide as antennomere 9. Antennomere 11 1.2 times as long as wide, 1.5 times as long as and about 0.9 times as narrow as antennomere 10. Pronotum companiform, 1.1-1.2 times as long as wide at apex, 0.8 times as long as wide in middle, subequal or 0.9 times as long as wide at base. Greatest width before apex. Disk densely punctate, weakly flattened in middle. Sides rounded. Scutellum small, trapezoidal. Elytra suboval, 1.7-1.8 times as long as wide at base, 1.4-1.5 times as long as wide in middle, 1.9-2.0 times as long as wide at apex, 2.7 times as long as pronotum. Humeri weakly smoothed. Greatest width beyond middle. Interstriae wide, 3.5-4.0 times as wide as striae width, flat, finely punctate. Striae quite deep, with rounded points. Procoxal cavities rounded and contiguous. Mesocoxal cavities separated. Metaventrite about 1.4 times as long as length of metacoxal cavity, flattened, punctate. Metanepisterna narrow, 8.0 times as long as wide in middle, densely punctate. Abdomen weakly convex. Abdominal ventrites 1 and 2 quite fused, weakly impressed in middle. Ventrite 1 slightly shorter than metacoxal cavity. Ventrite 2 slightly longer than ventrite 1. Ventrites 3 and 4 quite short, subequal in length. Ventrite 3 about 0.6 times as long as ventrite 2. Ventrite 5 about 1.9 times as long as ventrite 4. Pygidium hidden by elytra. Wings developed. Legs long. Procoxae subconical. Femora widened. Tibiae weakly biconcave, with apical comb of setae and small mucro. Tarsi long. Tarsomeres 1-3 with pulvilli on lower surface. Tarsomeres 1 and 2 conical, flattened. Tarsomere 2 shorter than tarsomere 1.Tarsomere 3 bilobed. Claws long and free. Tarsomere 5 elongated. Pro- and mesotarsi: Tarsomeres 1 and 2 wide-conical. Metatarsi: Tarsomeres 1 and 2 long-conical. Length of body: 7.3-7.5 mm. Length of rostrum: 1.3-1.4 mm.

Differential diagnosis. The new species is similar to A. streltzovi from Amurskaya Oblast (fig. 3) but differs from it in the weaker elongated apex of the aedeagus, longer elytra, weaker smoothed elytral humeri, developed wings, and weakly rufous scales on the sutural interstriae of the elytra.

Etymology. The species is named in honor of Dr. Vladimir V. Dubatolov (Novosibirsk), who collected this species.

Localisation. Amur River basin (fig. 3).

Figures

Figure 1. Asiodonus vladimiri Legalov, sp. nov., holotype, male: a – habitus, dorsal view; b – habitus, frontal view; c – habitus, lateral view; d – abdomen. Scale bar = 1.0 mm.

Figure 2. Asiodonus vladimiri Legalov, sp. nov., holotype, male, aedeagus: a – dorsal view; b – antero-dorsal view; c – lateral view. Scale bar = 0.5 mm.