Cionus neglectus, 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 : 79

46. Cionus neglectus sp. n.

Figs 46 a–f.

http://zoobank.org/ urn:lsid:zoobank.org:act:57FA0E84-D61A-4FCD-8311-B7DE30EB0F28

Type locality. Rila-Kloster ( Bulgaria) .

Type series. Holotype: a well-preserved, 4.12 mm long male labeled “Bulg. Rila - Geb. Rila - Kloster 1200 m 15.VI.1987 leg. Zerche &Behne / sp. griseopubens Wnglm. Gruppe Dieckmann det. 1987 / coll. Be / HOLOTYPUS Cionus neglectus sp. n. M.Košťál et R.Caldara des. 2017 [printed red label]” ( SDEI) . Paratypes (the same type labeling as holotype but instead of “ HOLOTYPUS ” “ PARATYPUS ”): “ Bulg. Rila - Geb. Rila - Kloster 1200 m 15.VI.1987 leg. Zerche & Behne / Cionus sp. griseopubens Wnglm. Gruppe Dieckmann det. 1987 / coll. Be ” (1 ♂ BN) ; “Bulg., Stara Pl. 8 km N Kalofer 800 m 6.VI.1987 leg. Zerche & Behne / spec. Gruppe um griseopubens Wnglm. Dieckmann det. 1987 / coll. Be ” (1 ♀ BN) ; “ Bulg. mer.occ. 20.6.73 Mt.Pirin-Begovica 1000-1600 m, Horák leg. / BMNH {E} 2010/26 O. Voříšek ” (1 ♀ BMNH) ; “ Macedonia MK 2010 Kichevo , Malo Crsko 1.5. 41 o 23´N, 21 o 01´E 800 m Leg. L. Bureš ” (1 ♂ coll. Bureš) .

Description. Male (holotype). Body stout, suboval. Head: rostrum moderately stout, medium long (l/ w 4.6, Rl/Pl 1.33), black; in lateral view similar to that of C. ganglbaueri , except apical part longer, evenly tapered to apex; in dorsal view near base moderately laterally constricted, in apical part slightly dorsoventrally flattened; texture and vestiture as in C. ganglbaueri . Head between eyes and eyes as in C. griseopubens . Antennae as in C. griseopubens except segments 3–4 apparently longer than wide, segment 5 slightly longer than wide; club markedly elongate, more than three times as long as wide, otherwise as in C. griseopubens . Pronotum: black, somewhat wider than long (Pl/Pw 0.65), texture and vestiture as in C. ganglbaueri , widest at base, outline as in C. griseopubens , without constriction, in lateral view as in C. griseopubens except curvature between basal and apical part less abrupt. Prosternum: similar to that in C. griseopubens . Scutellum: as in C. ganglbaueri . Elytra: black, in basal 2/3 very slightly rounded to subparallel, in apical part broadly, somewhat irregularly rounded, moderately elongate (El/Ew 1.26), widest in about mid-length, at base somewhat wider than pronotum (Ew/Pw 1.63), humeri rounded, moderately prominent, with indistinct posthumeral impression; almost flat on disc; pattern, width of interstriae and striae as in C. ganglbaueri except for both black tomentous maculae noticeably smaller, vestiture almost completely concealing integument. Venter: vestiture as in C. griseopubens but hair-like scales slightly thicker on mes- and metepisterna; mesosternal process as in C. griseopubens ; metasternum moderately concave, transversally punctured to ribbed; ventrite 1 with deep, semidensely roundly punctured impression, ventrite 2 with shallow, transversally ribbed impression; ventrite 1 1.6 × as long as ventrite 2, ventrites 1–2 combined 4.4 × as long as ventrites 3–4 combined, ventrites 3–4 combined of 0.8 length of ventrite 5. Legs: vestiture as in C. griseopubens , profemoral teeth and other characters as in C. ganglbaueri . Penis: Figs 46 d–f, very similar to that of C. ganglbaueri but its body slightly longer.

Female. Rostrum longer (Rl/Pl 1.57), antennal insertion closer to rostrum mid-length, shortly beyond 0.6 of rostrum length. Ventrites 1 and 2 without impression. Protarsal onychia slightly shorter, claws equally long.

Variability. Length ♂♂ 3.79–4.11 mm, ♀♀ 3.85–3.98 mm. The type series does not show much variability.

Diagnosis. This species is recognizable by concealed elytral integument, alternating black patchy pattern on odd interstriae, suboval elytra, moderately convex and subrotund pronotum, grayish vestiture, elongate antennal club, normally long protarsal onychia in both sexes, and penis shape.

Comparative notes. This species is most closely related to C. ganglbaueri and C. griseopubens . It differs from the former by its elongate antennal club, more convex and less conically narrowed pronotum, suboval elytra and smaller dorsal elytral macula, and from the latter by the suboval elytra, and penis shape.

Biological notes. Unknown. Verbascum species are suspected to be host plants because some related species in the group ( C. ganglbaueri and C. colonnellii ) develop on Verbascum . Montane species collected at 800–1,600 m a. s. l.

Distribution. Bulgaria, Macedonia.

Etymology. The species was being overlooked and confused mostly with C. griseopubens and C. ganglbaueri for a long time. The adjective “neglectus” means “overlooked” in Latin.

Non-type specimens examined. None.

Figures

FIGURES 45–46. FIGURE 45. Cionus griseopubens. 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. FIGURE 46. Cionus neglectus 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.