Eremochorus (Eremochorus) kalashiani Legalov, 2023

Legalov, Andrei A., 2023, A new species of the genus Eremochorus Zaslavskij, 1962 (Coleoptera: Curculionidae) from Central Altai (Russia) with systematics remarks, Ecologica Montenegrina 65, pp. 76-85 : 77-79

Eremochorus (Eremochorus) kalashiani Legalov , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:EFC92AA5-E013-4120-8DCE-E3030E5F6409

( Figs. 1 , 2 )

Type material: Holotype, male ( MKCY), RUSSIA, Altai Republic, Ongudaisky District , “Chuya [River], km 320, Inja, terrace, Altai, 20.6.[19]66”, S.M. Iablokoff-Khnzorian . Paratypes, 2 females ( MKCY) , 1 female ( ISEA), idem ; 1 female ( ZIN), RUSSIA, Altai Republic, Ongudaisky District , “Chuyiskii trakt, Ust’- Inja, 15.VI.1907, E. Rodd ”, “gen. Macrotarsus Schönh. , ♀, Faldermanni Schönh., G. Suvorov det.”

Description. Body black, covered with sparse weakly dissected apically scales and semierect setae. Antennae and tarsi brown. Male: Rostrum quite long, weakly curved, with distinct middle glabrous carina, densely punctate, almost glabrous at apex, about 2.3 times as long as wide at apex, about 2.5 times as long as wide in middle, about 2.4 times as long as wide at base, about 0.7 times as short as pronotum. Mandibles massive with two teeth on inner edge. Forehead flat with central point, densely punctate, about 0.5 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 7.9 times as long as wide at apex, almost reaching eyes. Antennomeres 2−5 long-conical. Antennomere 2 3.6 times as long as wide at apex, about 0.3 times as long as and 0.7 times as narrow as antennomere 1. Antennomere 3 about 2.7 times as long as wide at apex, about 0.7 times as long as and 0.9 times as narrow as antennomere 2. Antennomere 4 about 2.3 times as long as wide, about 0.7 times as long as and about 0.8 times as narrow as antennomere 3. Antennomere 5 subequal to antennomere 4. Antennomeres 6−8 subconical. Antennomere 6 1.5 times as long as wide at apex, about 0.8 times as long as and about 1.1 times as wide as antennomere 5. Antennomere 7 1.1 times as long as wide at apex, about 0.9 times as long as and about 1.3 as wide as antennomere 6. Antennomere 8 about 0.8 times as long as wide at apex, about 0.9 times as long as and 1.2 times as wide as antennomere 7. Club compact, about 0.5 times as long as antennomeres 2-8 combined. Antennomere 9 1.4 times as long as wide at apex, 2.0 times as long as and about 1.2 times as wide as antennomere 8. Antennomere 10 about 1.4 times as long as wide in middle, 1.2 times as long as and about 1.2 times as wide as antennomere 9. Antennomere 11 about 0.9 times as long as wide at base, 0.5 times as long as and about 0.8 times as narrow as antennomere 10. Pronotum companiform, about 1.5 times as long as wide at apex, about 1.3 times as long as wide in middle, about 1.4 times as long as wide at base. Greatest width before middle. Disk densely punctuate, weakly flattened in middle. Scutellum small, about 1.4 times as long as wide, trapezoidal. Elytra suboval, about 2.2 times as long as wide at base, about 1.6 times as long as wide in middle, about 2.3 times as long as wide at apex, about 2.7 times as long as pronotum. Humeri smoothed. Greatest width in middle. Interstriae wide, 4.0−4.4 times as wide as striae width, weakly convex, densely punctate. Striae quite deep, with rounded points. Procoxal cavities rounded and contiguous. Pre- and postcoxal portions of prosternum very short. Precoxal portion about 0.1 times as long as length of procoxal cavity. Postcoxal postion 1.6 times as long as precoxal portion length. Mesocoxal cavities separated. Metaventrite short, 0.8 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 slightly longer than ventrite 1. Ventrites 3 and 4 quite short, subequal in length. Ventrite 3 about 0.8 times as long as ventrite 2. Ventrite 5 1.9 times as long as ventrite 4. Pygidium hidden by elytra. Legs long. Femora widened. Tibiae weakly biconcave, with apical comb of thickened black setae and 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 dark thorns around edges; tarsomere 2 shorter than tarsomere 1; tarsomere 3 lacking dark thorns around edges. Mesotarsi: tarsomeres 1−2 with partially reduced pulvilli on lower surface and with dark thorns around edges; tarsomere 1 conical; tarsomere2 wide-conical, shorter than tarsomere 1; with pulvilli on lower surface; tarsomere 3 with pulvilli on lower surface, lacking dark thorns around edges. Metatarsi: tarsomeres 1−3 with dark thorns around edge, without pulvilli on lower surface; tarsomeres 1 and 2 long-conical, tarsomere 3 with reduced pulvilli on lower surface. Length of body: 8.7 mm. Length of rostrum: 1.7 mm. Female: Rostrum about 1.5 times as long as wide at apex, 1.5−1.6 times as long as wide in middle, 1.5−1.7 times as wide at base, 0.9 times as long as pronotum. Pronotum 1.2−1.3 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. Elytra 2.0−2.2 times as long as wide at base, 1.4−1.5 times as long as wide in middle, 1.9−2.1 times as long as wide at apex, 2.8−3.0 times as long as pronotum. Metaventrite subequal in length to metacoxal cavity. Metepisternum narrow, about 10.3 times as long as wide in middle. Abdomen more convex. Ventrites 1 and 2 lacking depression in middle. Ventrite 1 about 1.4 times as long as length of metacoxal cavity. Ventrite 2 about 0.9 times as long as ventrite 1. Ventrite 3 about 0.8 times as long as ventrite 2. Ventrite 4 slightly shorter than ventrite 3. Ventrite 5 1.6 times as long as ventrite 4. Length of body: 8.8−9.7 mm. Length of rostrum: 1.7−1.8 mm.

Differential diagnosis. The new species is similar to E. steppenis (Motschulsky, 1860) from Kazakhstan but differs from it in the wider aedeagus with quite short apex, and not rounded sides of the pronotum.

Etymology. Patronymic. In honour of Dr. Mark Yu. Kalashian (Scientific Center of Zoology and Hydroecology NAS Armenia, Yerevan), who provided me with this material for study.

Localisation. Central Altai ( Fig. 2 ).

Figures

Figure 1. Eremochorus kalashiani sp. nov.: a – male, holotype, habitus, dorsal view; b – female, paratype, habitus, dorsal view; c – aedeagus, holotype, dorsal view; d – aedeagus, holotype, lateral view; e – aedeagus, holotype, ventral view; f – abdomen, holotype, dorsal view. Scale bar 1.0 mm.

Figure 2. Distribution of Eremochorus spp.: black circle – E. mniszechi, red circle – E. kalashiani sp. nov.