Cionus rossicus, Košťál & Caldara, 2019

Košťál, Michael & Caldara, Roberto, 2019, Revision of Palaearctic species of the genus Cionus Clairville (Coleoptera: Curculionidae: Cionini), Zootaxa 4631 (1), pp. 1-144 : 76-77

44. Cionus rossicus sp. n.

Figs 44 a–f.

http://zoobank.org/ urn:lsid:zoobank.org:act:4091E939-E4E8-4ED1-BEE9-D01F04ACFA23

Type locality. Kislovodsk ( Russia) .

Type series. Holotype: a completely preserved, 3.95 mm long male labeled “Ca.b- 14.6.72 Kislowodsk Voříšek leg. / Cionus sp.? Voříšek det. 1973 / BMNH {E} 2010-26 O. Voříšek / HOLOTYPUS Cionus rossicus sp. n. M.Košťál et R.Caldara des. 2017 [printed red label]” ( BMNH) . Paratypes (same designating label but instead “HO- LOTYPUS” “ PARATYPUS ”): same labeling as holotype without “ Cionus sp.? Voříšek det. 1973” label (1 ♂ BMNH); “S. RUSSIA 330Km. NNE Rostov na Donu Veshenskaja 15/VII/2001 Yu Liman Leg. / coll. Talamelli ” (2 ♂♂, 2 ♀♀ TI); “ARM-Kotayk, Tsakhadzor Tsagkunyats Mt. 2708 m 40 o 31´50˝N, 44 o 39´12˝E lgt. J.Krátký 10.6.2017 ” (1 ♀ KY); “VALACHIE Comana A. L. Montandon / ♀ / Galnglbaueri aut n. sp. nec griseopubens quo- niam oculi multo minores” (1 ♀ MSNM); “VALACHIE Comana A. L. Montandon / ♀ ” (1 ♀ MSNM) .

Description. Male (holotype). Body stout, suboval. Head: rostrum moderately stout, medium long (l/ w 4.8, Rl/Pl 1.30), blackish-brown; in lateral view unevenly curved, almost straight in basal and apical part, at antennal insertion markedly curved, with indistinct swelling before antennal insertion, basal part of equal width, apical part moderately tapered to apex; in dorsal view moderately broadened to antennal insertion, then parallel to apex, in basal part in cross-section constricted laterally, in apical part moderately dorsoventrally flattened; in basal part very densely, longitudinally punctured, in apical part with round, less densely distributed punctures, very close to apex without punctures, shiny; in basal part covered with subrecumbent, backwardly to transversally oriented, moderately elongate yellow scales, at antennal insertion and in apical part with transversally to forwardly oriented, subrecumbent to erect, grayish thinner hair-like scales. Head between eyes narrow, of 0.3 rostrum width at base. Eyes large, rounded, very slightly protruding from head outline. Antennae reddish-brown to brown, with darkened club, inserted at 0.7 of rostrum length; funicle of 0.7 scape length, segment 1 slightly wider than segment 2, of 0.9 length of segment 2, segment 1 nearly twice, segment 2 nearly three times as long as wide, segments 3 and 4 slightly longer than wide, segment 5 subglobose; club elongate, 2.7 × as long as wide, of 0.9 funicle length, completely covered with recumbent, densely arranged, tiny grayish hairs and sparse, erect pale sensilla. Pronotum: black, somewhat wider than long (Pl/Pw 0.67), densely evenly punctured, punctures small and round, of equal size; almost completely covered with forwardly to whirl-like oriented, subrecumbent, moderately elongate (l/w 4–6) yellow scales; widest at base, sides very moderately rounded to conically convergent to anterior margin, in lateral view in basal half flat on disc, then falling forwards without constriction before anterior margin. Prosternum: anterior margin with deep, sharply incised emargination not reaching coxae, with prominent posterior shining tubercles very close to coxae. Scutellum: oblongly triangular, sharp at apex, densely covered with backwardly oriented scales similar to those on elytra. Elytra: black, in basal 2/3 very slightly rounded, in apical third broadly evenly rounded, moderately elongate (El/Ew 1.22), widest at mid-length, at base moderately wider than pronotum (Ew/Pw 1.54), humeri broadly rounded, prominent, without posthumeral impression; evenly convex on disc; interstria 1 from 1/4 to shortly before half of medial length markedly broadened and before apex slightly broadened, interstria 2 at same lengths narrowed and somewhat constricted laterally encompassing nearly evenly round dorsal and uneven preapical black tomentous maculae surrounded by yellow scales similar to those on rest of elytra; interstriae except perimacular areas of equal width, flat; odd interstriae without patches of scales; striae very shallow, indistinct; entire surface densely covered with fully recumbent, only slightly elongate (l/w 3–5), distally mostly truncated, yellow scales completely concealing integument. Venter: relatively densely covered with recumbent, elongate scales and subrecumbent hairs, not clustered at ventrite margins; mesosternal process slightly convex, broad, moderately concave at apex; metasternum flat to slightly concave, transversally punctured and ribbed; ventrite 1 with broad and clear impression, evenly and relatively sparsely punctured by small round punctures, ventrite 2 flat, with densely arranged hairs; ventrite 1 twice as long as ventrite 2, ventrites 1–2 combined 5 × as long as ventrites 3–4 combined, ventrites 3–4 combined of 0.6 length of ventrite 5. Legs: blackish-brown, tarsi, especially tarsomere 3, very slightly lighter, onychia and claws reddish-brown, onychia distally darkened; profemora with medium-sized sharp teeth, meso- and metafemora with large sharp triangular teeth; femora, tibiae and tarsi densely but not confluently covered with recumbent to subrecumbent yellow and whitish-yellow elongate scales, on femora not clustered into transverse bands, onychia with recumbent to suberect (on apex), thin, whitish hairs; protarsal onychia of normal length, as long as tarsomeres 1–3 combined, protarsal tarsomere 3 as long as wide; lateral protarsal claws thin, of about half medial claw length, in more than half of their length fused with medial claw, almost rudimentary, medial claws of meso- and metatarsi of more than half length of lateral claws, except base well separated. Penis: Figs 44 d–f, its body very similar to that of C. ganglbaueri , moderately broader.

Female. Rostrum slightly longer (Rl/Pl 1.4), of similar shape as in male, except for antennal insertion closer to rostrum mid-length, at about 0.6 of rostrum length. Ventrites 1 and 2 without impression. Onychia of anterior legs slightly shorter than tarsomeres 1–3 combined, claws equally long.

Variability. Length ♂♂ 3.95–4.34 mm, ♀♀ 4.04–4.10 mm. The type series does not show much variability. The paratype from Armenia has scattered patches of black scales on odd elytral interstriae.

Diagnosis. This species is recognizable by concealed elytral integument, shortly elongate, relatively wide, very densely arranged, absolutely recumbent and appressed scales on elytra, missing to markedly reduced pattern on odd elytral interstriae, more elongate elytra, and penis shape.

Comparative notes. This species is most related to C. ganglbaueri , from which it differs by oblong elytra entirely covered with absolutely recumbent and appressed scales.

Biological notes. Biology unknown.

Distribution. Southern Russia, Armenia, Romania.

Etymology. The name of the species is an adjective derived from Russia, in Latin Rossia, where the type locality is situated.

Non-type specimens examined. None.

Figures

FIGURES 43–44. FIGURE 43. Cionus colonnellii sp. n. a: body in dorsal view (male), b: body in lateral view (male), c: rostrum in lateral view (female), d: penis in ventral view, e: penis in lateral view, f: apex of penis in dorsal view. Not to scale. FIGURE 44. Cionus rossicus sp. n. a: body in dorsal view (male), b: body in lateral view (male), c: rostrum in lateral view (female), d: penis in ventral view, e: penis in lateral view, f: apex of penis in dorsal view. Not to scale.