Macrotarrhus (Alexiola) georgyvoronovi Legalov et Kozlov, 2023

Legalov, Andrei A. & Kozlov, Anton O., 2023, Two new species of the tribe Hyperini (Coleoptera, Curculionidae) from Central Asia, Ecologica Montenegrina 70, pp. 38-45 : 42-44

Genus: Macrotarrhus Bedel, 1906

Subgenus: Alexiola Suvorov, 1912

Macrotarrhus (Alexiola) georgyvoronovi Legalov et Kozlov , sp. nov. ( Fig. 2 ) https://zoobank.org/ urn:lsid:zoobank.org:act:7979DFAC-CEEE-40FE-8A34-34AD3811B4BF

Type material: Holotype, male ( ISEA), KAZAKHSTAN, Almaty Region, watershed between Nizhnyaya Taldy and Verkhnyaya Taldy Rivers (tributaries of Siek River ), 44°25' N, 79°51' E, 1300 m, rocky mountain steppe, 26-28.VI.2016, A.A. Fomichev.

Description. Male: Body black, covered with sparse weakly dissected apically brown and light scales and setae. Pronotum and elytra with stripes of light scales. Antennae, tibiae and tarsi brown. Rostrum quite short, almost straight, flattened dorsally, with distinct middle glabrous carina, densely punctate, lacking scales at apical part, about 1.2 times as long as wide at apex, about 1.4 times as long as wide in middle, about 1.2 times as long as wide at base, about 0.6 times as short as pronotum. Mandibles massive with one tooth on inner edge. Forehead weakly depressed to middle, with central small point, densely punctate, about 0.8 times as long as rostrum base width. Eyes large, finely faceted, transversely oval, weakly convex. Temples short. Antennae long, inserted before apex of rostrum. Scapus long, about 5.9 times as long as wide at apex, extend beyond apical part of eyes. Antennomeres 2 and 3 long-conical. Antennomere 2 3.0 times as long as wide at apex, about 0.4 times as long as and about 0.7 times as narrow as antennomere 1. Antennomere 3 about 3.0 times as long as wide at apex, about 0.9 times as long as and about 0.9 times as narrow as antennomere 2. Antennomere 4 rounded, about 1.1 times as long as wide, about 0.4 times as long as and slightly wider than antennomere 3. Antennomere 5 about 1.4 times as long as wide at apex, about 1.4 times as long as and about 1.1 times as wide as antennomere 4. Antennomeres 6-8 wide-conical. Antennomere 6 about 0.8 times as long as wide at apex, about 0.5 times as long as and equal in width to antennomere 5. Antennomere 7 0.8 times as long as wide at apex, about 1.3 times as long as and about 1.3 times as wide as antennomere 6. Antennomere 8 about 0.6 times as long as wide at apex, 0.9 times as long as and about 1.1 times as wide as antennomere 7. Club compact, about 0.5 times as long as antennomeres 2-8 combined. Antennomere 9 about 0.6 times as long as wide at apex, about 1.3 times as long as and about 1.3 times as wide as antennomere 8. Antennomere 10 slightly shorter than wide in middle, about 1.4 times as long as and equal in width to antennomere 9. Antennomere 11 1.6 times as long as wide at base, 1.2 times as long as and about 0.7 times as narrow as antennomere 10. Pronotum companiform, 1.2 times as long as wide at apex, 0.9 times as long as wide in middle, slightly narrower than width at base. Greatest width near middle. Disk densely punctate, weakly convex. Scutellum very small, trapezoidal. Elytra suboval, about 1.8 times as long as wide at base, about 1.6 times as long as wide in middle, about 1.9 times as long as wide at apex, about 2.3 times as long as pronotum. Humeri smoothed. Greatest width in middle. Interstriae wide, 6.0-7.0 times as wide as striae width, flattened, densely punctate. Striae quite deep, with rounded points. Procoxal cavities rounded and contiguous. Pre- and postcoxal portions of prosternum very short. Precoxal portion about 0.2 times as long as length of procoxal cavity. Metaventrite short, 0.5 times as long as length of metacoxal cavity. Metanepisterna very narrow, punctate. Abdomen weakly convex. Abdominal ventrites 1 and 2 fused, with weak depression in middle. Ventrite 1 about 0.9 times as long as metacoxal cavity. Ventrite 2 subequal to ventrite 1. Ventrite 3 about 0.9 times as long as ventrite 2. Ventrite 4 slightly shorter than ventrite 3. Ventrite 5 about 1.3 times as long as ventrite 4. Pygidium hidden by elytra. Legs long. Femora widened. Tibiae weakly biconcave, with thickened brown thorns on inner edge, with apical comb of thickened brown. Protibiae with small mucro. Tarsi long. Metatarsi longer than pro- and mesotarsi. Tarsomere 3 bilobed. Claws long and free. Tarsomere 5 elongated. Protarsi: tarsomeres 1-3 flattened, with pulvilli on lower surface; tarsomeres 1 and 2 wide-conical, with brown thorns around edges; tarsomere 2 shorter and wider than tarsomere 1; tarsomere 3 lacking thorns around edges. Mesotarsi: tarsomeres 1-3 with partially reduced pulvilli on lower surface and with brown thorns around edges; tarsomeres 1 and 2 wide-conical; tarsomere 2 shorter and wider than tarsomere 1. Metatarsi: tarsomeres 1-3 without pulvilli on lower surface; tarsomeres 1 and 2 long-conical; tarsomere 3 with partially reduced pulvilli on lower surface. Length of body: 7.6 mm. Length of rostrum: 1.5 mm.

Differential diagnosis. The new species is similar to M. (A.) sugatensis Zaslavskij, 1964 from Jambyl Region ( Kazakhstan) and differs in the presence of stripes of light scales on the pronotum and elytra ( Figs. 2A , 3A ), weakly rounded sides of the pronotum, and a long basal sclerite ( Figs. 2E, 2H , 3B ).

Etymology. Patronymic. In honour of Georgy Gennadievich Voronov (22.06.1983) from Moscow, Russia, who is the founder of Lucy Voronova Arts Support Foundation.

Localisation. Kazakhstan, Almaty Region.

Figures

Figure 2. Macrotarrhus georgyvoronovi sp. nov., male, holotype: A – habitus, dorsal view; B – habitus, lateral view; C – abdomen; D – habitus, lateral view; E – aedeagus, dorsal view; F – aedeagus, ventral view; G – aedeagus, lateral view; H – basal sclerite, dorsal view. Scale bar 1.0 mm.

Figure 3. Macrotarrhus sugatensis, male, holotype: A – habitus, dorsal view; B – aedeagus, dorsal view. Scale bar 1.0 mm for A.