Cionus boroveci, 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 : 61-63

35. Cionus boroveci sp. n.

Figs 35 a–f.

http://zoobank.org/ urn:lsid:zoobank.org:act:99487B25-DA0E-4F1B-8F9A-95658917B9C4

Type locality. Omalos (Crete, Greece) .

Type series. Holotype: a completely preserved, 3.37 mm long male “ CRETA occ. Lefka Ori Mts. M. Košťál leg. / Omalos 5 km S Gingilos Mt. 1300 m 13.vii.1992 / HOLOTYPUS Cionus boroveci sp.n. M.Košťál et R.Caldara des. 2012 [printed red label]” ( NMPC) . Paratypes: the same labeling as holotype but instead of “ HOLOTYPUS ” “ PARATYPUS ” (1 ♂, 1 ♀ KO, 1 ♂ CA); “ CRETE occ. Lefka Óri Mts. Omalos-env., 4 km S 11.4 .1990 1400 m R.Borovec lgt. / Cionus n.sp. pr. ungulatus R.Borovec det. 1991” (1 ♂ BO) .

Description. Male. Body medium stout, subparallel. Head: rostrum moderately stout, medium long (l/ w 4.67, Rl/Pl 1.33), dark brown; in lateral view evenly curved, same width from base to antennal insertion, then moderately tapered to apex; in dorsal view slightly broadened to antennal insertion, then parallel to apex, in most basal part slightly laterally constricted, in about middle third in cross-section nearly round, beyond antennal insertion flattened dorsoventrally; basal part until antennal insertion very densely to confluent longitudinally punctured, apical part with round, sparsely distributed punctures, at apex glabrous, shiny; basal part covered with subrecumbent, backwardly oriented whitish and light brownish intermixed moderately elongate scales, apical part with suberect, forwardly oriented, long whitish and light brownish seta-like scales. Head between eyes narrow, of about 0.3 rostrum width at base. Eyes large, evenly rounded, not protruding from head outline. Antennae reddish-brown, inserted at 0.7 of rostrum length; funicle of about 0.7 scape length, segment 1 wider than, and as long as segment 2, segment 1 twice, segment 2 more than twice as long as wide, segments 3–5 subquadrate; club oval, about 2.4 × as long as wide, of 0.8 funicle length, densely covered with recumbent, tiny, thin yellowish to whitish setae and sparse long thin whitish seta-like sensilla. Pronotum: reddish-brown, with darkened anterior margin, markedly wider than long (Pl/Pw 0.61), very densely, unevenly punctured, covered with subrecumbent, on disc forwardly oriented, reddish -yellow and white intermixed, elongate (l/w 5–7) scales and very few shorter, suberect black seta-like scales; widest at base, until half of length subparallel, in anterior half conically narrowed to anterior margin, very slightly convex on disc. Prosternum: anterior margin with marked, sharply incised subrotund emargination not reaching coxae. Scutellum: black, triangular, covered with evenly distributed, recumbent, backwardly oriented, small thin whitish and sporadic reddish scales. Elytra: reddish-brown, subparallel in anterior 2/3 of their length, then broadly rounded, moderately elongate (El/Ew 1.24), widest approximately at half of their length, at base markedly wider than pronotum (Ew/Pw 1.78), humeri prominent, broadly rounded; moderately convex on disc; interstriae convex, except perimacular areas of equal width, interstria 1at 1/3 of medial length and in preapical area strongly broadened, interstria 2 at same lengths narrowed and constricted laterally encompassing round, black tomentous maculae with border formed by sparsely arranged, reddish to gingery scales, dorsal macula larger than preapical one; odd interstriae with unevenly distributed, small, indistinct black and whitish alternating patches of scales; striae shallow and narrow, formed by single rows of subrotund shallow punctures; entire surface covered with semidensely arranged recumbent to subrecumbent, relatively short elongate (l/w 3–5), whitish and reddish scales, especially in posterior part, additionally with short suberect, clearly visible black seta-like scales concealing major part of integument. Venter: densely covered with subrecumbent, elongate, whitish scales, more densely arranged on lateral sides of ventrite 5, sides of metasternum with intermixed yellow elongate scales being on metepisternum very densely arranged to overlapping; mesosternal process short, straightly truncated at apex; metasternum slightly concave, with very densely arranged, transverse elongate punctures forming small ribs, at posterior margin of metasternum small bare round impression; ventrite 1 and 2 with deep median longitudinal impression; ventrite 1 1.5 × as long as ventrite 2, ventrites 1–2 combined 5.4 × as long as ventrites 3–4 combined, ventrites 3–4 combined of 0.6 length of ventrite 5. Legs: brown to reddish-brown, onychia at apices slightly darkened; profemora with forwardly protruding small triangular sharp teeth, meso- and metafemora with large, triangular sharp teeth; entire legs covered with recumbent to subrecumbent (on tarsi and tibial apices suberect), whitish, strongly elongate, thin seta-like scales; protarsal onychia long, of same length as tarsomeres 1–3 combined; protarsal lateral claws small and thin, meso- and metatarsal medial claws of about 2/3–3/4 length of their pair-claws. Penis: Figs 35 d–f, its body similar to that in C. thapsus .

Female. Rostrum longer (Rl/Pl 1.53), antennae inserted at 0.6 of rostrum length. Ventrites 1 and 2 without impression. Protarsal onychia of normal length, of about 0.85 length of tarsomeres 1–3 combined. Claws of almost equal length.

Variability. Length: ♂♂ 3.25–3.62 mm, ♀ 3.55 mm. The type series does not show considerable variability. In one specimen the legs, especially tarsi, are darker (it is a specimen collected in April i. e. overwintered). The reddish scale border, size and shape of both maculae vary from narrow, small and round to broad, larger and subrotund.

Diagnosis. This species is characterised by reddish outlined maculae, small body size, in the ungulatus -group relatively short protarsal onychia, and body of penis similar to that of C. thapsus .

Comparative notes. Cionus boroveci differs from the most closely related species C. balianii by clear reddish outline of elytral maculae, smaller body size, and completely different shape of penis.

Distribution. Crete.

Etymology. We dedicate the species to our friend Roman Borovec, who collected the first specimen more than 25 years ago, and already at that time supposed that the species might be new to science.

Non-type specimens examined. None.

Figures

FIGURES 35–36. FIGURE 35. Cionus boroveci. 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 36. Cionus thapsus. 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.