Eremochorus (Eremochorus) kuraicus Legalov, 2022

Legalov, Andrei A., 2022, A new species of the genus Eremochorus Zaslavskij, 1962 (Coleoptera: Curculionidae) from South-eastern Altai (Russia), Ecologica Montenegrina 50, pp. 28-32 : 29-31

Species: Eremochorus (Eremochorus) kuraicus Legalov , sp. nov. ( Figs. 1 , 2 )

http://zoobank.org/ urn:lsid:zoobank.org:act:94CA0A9F-0489-4A7C-8A56-4097C0229C0A

Type material: Holotype, male (ISEA), RUSSIA, Altai Republic, SE Altai, Kuray Mountains , 10 km NE of Kosh-Agach, 4 km SW of Tabozhok Mt., 2150-2300 m, 50.058° N, 88.792° E, 7-8.VI.2021, R.Yu. Dudko . Paratypes, 2 females, idem ; 1 male ( CSRN), Kosh-Agach District, 4km E of Chagan-Uzun vill., southern spurs of Kuray Mountains , 2100 m, 50°05'45.1"N 88°25'35.5"E, Artemisia santolinifolia , 16.VII.2018, S.V. Reshetnikov .

Description. Body black, covered with sparse weakly dissected apically scales and narrow scales. Tarsal claws brown.

Male: Rostrum quite long, weakly curved, with distinct middle carina, densely punctate in basal and middle thirds, almost glabrous at apex, 2.5 times as long as wide at apex, 3.0 times as long as wide in middle, about 2.6 times as long as wide at base, about 0.9 times as short as pronotum. Mandibles massive with two teeth on inner edge. Forehead about 0.8 times as long as rostrum base width, flat, densely punctate. Eyes large, finely faceted, transversely oval, weakly convex. Temples short, subequal in to length of eye. Antennae inserted before apex of rostrum. Antennae long. Scapus long, about 8.9 times as long as wide at apex, almost reaching eyes. Antennomeres 2-5 long-conical. Antennomere 2 about 3.4 times as long as wide, 0.3 times as long as and about 0.8 times as narrow as antennomere 1. Antennomere 3 3.0 times as long as wide, about 0.8 times as long as and about 0.9 times as narrow as antennomere 2. Antennomere 4 2.0 times as long as wide, about 0.6 times as long as and about 0.9 times as narrow as antennomere 3. Antennomere 5 about 1.4 times as long as wide, about 0.8 times as long as and about 1.1 times as wide as antennomere 3. Antennomeres 6-8 subconical. Antennomere 6 equal in length and width at apex, about 0.8 times as long as and about 1.1 times as wide as antennomere 5. Antennomere 7 equal to antennomere 6. Antennomere 8 about 0.8 times as long as wide, about 1.1 times as long as and about 1.4 times as wide as antennomere 7. Club compact, about 2.7 times as long as wide, about 0.4 times as long as antennomeres 2-8 combined. Pronotum companiform, 1.4 times as long as wide at apex, about 0.9 times as long as wide in middle, about 1.1 times as long as wide at base. Greatest width before apex. Disk densely punctuate, weakly flattened in middle. Scutellum small, trapezoidal. Elytra suboval, about 2.4 times as long as wide at base, about 2.0 times as long as wide in middle, about 2.6 times as long as wide at apex, about 3.3 times as long as pronotum. Humeri smoothed. Greatest width in middle. Interstriae wide, 6.0-7.0 times as wide as striae width, flat, punctate. Striae quite deep, with rounded points. Procoxal cavities rounded and contiguous. Precoxal portion of prosternum about 0.2 times as long as length of procoxal cavity, equal in length to postcoxal postion. Mesocoxal cavities separated. Metaventrite short, about 0.6 times as long as length of metacoxal cavity. Metanepisterna very narrow, punctate. Abdomen weakly convex. Abdominal ventrites 1 and 2 quite fused, with depression 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 0.7 times as long as ventrite 2. Ventrite 5 about 1.9 times as long as ventrite 4. Pygidium hidden by elytra. Legs long. Femora widened. Tibiae weakly biconcave, with apical comb of thickened setae and small mucro. Tarsi long. Metatarsi longer than pro- and mesotarsi. Tarsomere 3 bilobed. Claws long and free. Tarsomere 5 elongated. Pro- and mesotarsi: Tarsomeres 1-3 with pulvilli on lower surface. Tarsomeres 1 and 2 wide-conical, flattened, with dark thorns around edges. Tarsomere 2 shorter than tarsomere 1. Metatarsi: Tarsomeres 1-3 with dark thorns around edges. Tarsomeres 1 and 2 long-conical. Tarsomere 2 shorter than tarsomere 1. Tarsomere 3 weak pulvilli on lower surface, shorter than tarsomere 2. Length of body: 11.7-12.8 mm. Length of rostrum: 2.2 mm.

Female: Rostrum 2.3 times as long as wide at apex and at base, 3.0 times as long as wide in middle, 0.9 times as long as pronotum. Pronotum 1.5 times as long as wide at apex, 0.9 times as long as wide in middle, slightly longer than width at base. Elytra 2.4 times as long as wide at base, 2.1 times as long as wide in middle, 2.6 times as long as wide at apex, 3.5 times as long as pronotum. Metaventrite slightly longer than metacoxal cavity. Abdomen more convex. Ventrites 1 and 2 lacking depression in middle. Ventrite 1 1.5 times as long as length of metacoxal cavity. Ventrite 2 slightly shorter than ventrite 1. Ventrites 3 and 4 quite short, subequal in length. Ventrite 3 0.8 times as long as ventrite 2. Ventrite 5 about 1.8 times as long as ventrite 4. Length of body: 12.6-12.9 mm. Length of rostrum: 2.3 mm

Differential diagnosis. The new species is similar to E. mikhailovi from Central Altai (fig 2) but differs from it in the longer rostrum with distinct middle carina, longer elytra and the aedeagus (fig. 1).

Etymology. From Kuray Mountains.

Localisation. Eastern slope of Kuray Mountains (fig. 2).

Figures

Figure 1. Eremochorus spp.: a – E. kuraicus sp. nov., holotype, male, habitus, dorsal view; b – E. kuraicus sp. nov., paratype, female, habitus, dorsal view; c – E. mikhailovi, male, habitus, dorsal view; d – E. kuraicus sp. nov., holotype, male, rostrum and head, dorsal view; e – E. mikhailovi, male, rostrum and head, dorsal view; f – E. kuraicus sp. nov., holotype, male, aedeagus, dorsal view; g – E. mikhailovi, male, aedeagus, dorsal view. Scale bar for a-c = 2.0 mm, for d-g = 1.0 mm.

Figure 2. Distribution of Eremochorus spp.: star – E. mikhailovi, octagon – E. kuraicus sp. nov.