Cionus canariensis Uyttenboogaart, 1937

Košťál, Michael & Caldara, Roberto, 2019, Revision of Palaearctic species of the genus Cionus Clairville (Coleoptera: Curculionidae: Cionini), Zootaxa 4631 (1), pp. 1-144 : 29-30

12. Cionus canariensis Uyttenboogaart, 1937

Figs 12 a–f.

Cionus canariensis Uyttenboogaart, 1937a: 16 . Zumpt, 1937: 228. Caldara, 2013: 123. Alonso-Zarazaga et al., 2017: 185.

Type locality. Lagunetas (Gran Canaria).

Type series. According to the original description, the species was described based on a single specimen. In the coll. of MZHF, there is a single male labeled “Gr. Canaria Los Lagunetas R. Storå / 4080 / Cionus canariensis nov. sp. Uyttenb.det / Cionus canariensis Uyttenb. type [handwritten on red label] / Mus. Zool. H:fors Spec. typ. No 1718 Cionus canariensis Uytt. ” We dissected the genitalia of this specimen. Its labeling completely corresponds to the data given in the original description. Therefore, it is obvious that this specimen is the holotype of C. canariensis Uyttenboogaart. The holotype is 3.67 mm long, well-preserved with both posterior tarsi and right onychium of mesotarsus missing.

Synonyms. None.

Redescription. Male. Body subparallel to suboval. Head: rostrum moderately stout, medium long (l/ w 5.6, Rl/Pl 1.50), black; in lateral view moderately evenly curved, with small convexity on ventral curvature at antennal insertion, basal part of same with, from antennal insertion tapered to apex; in dorsal view very slightly broadened from base to antennal insertion, then distinctly broadened to apex, with concave outline between antennal insertion and apex, from base to antennal insertion in cross-section not constricted, apical part distinctly flattened dorsoventrally; basal part and proximal half of apical part very densely to confluently longitudinally punctured to ribbed, in distal half of apical part punctures well separated leaving small glabrous area; at base with mostly medially oriented, subrecumbent, elongate yellowish scales, apical part with forwardly oriented, suberect hair-like scales of similar color. Head between eyes narrow, of 0.6 rostrum width at base. Eyes large, rounded, moderately convex, slightly protruding from head outline. Antennae reddish-brown to dark brown, club darkened, inserted at 0.6 of rostrum length; funicle relatively short, of 0.6 scape length, segment 1 wider than segment 2, of 0.8 its length, segment 1 twice as long as wide, segment 2 long, 3.5 × as long as wide, segment 3 moderately longer than wide, segments 4–5 subglobose; club elongate, 2.5 × as long as wide, of 1.1 funicle length, completely covered with recumbent, densely arranged, dark tiny hairs, with sparse erect light sensilla. Pronotum: black, markedly wider than long (Pl/Pw 0.62), densely evenly punctured, punctures small, subrotund, approximately similar in size; evenly densely covered with recumbent (at base) to subrecumbent elongate (l/w 6–8), whitish to yellowish scales; widest at base, nearly evenly conically narrowed to anterior margin, with only indistinct wide constriction in anterior third, feebly convex in basal 2/3, in lateral view in basal part flat on disc, then slightly falling forwardly without visible constriction. Prosternum: anterior margin with distinct emargination bounded by sharp incisions, not reaching coxae. Scutellum: triangular, blunt at apex, covered with backwardly oriented, densely arranged, recumbent, yellowish elongate scales similar to those on elytra. Elytra: reddish, moderately elongate (El/Ew 1,23), slightly rounded along 2/3 of their length, in apical third broadly evenly rounded, widest shortly beyond mid-length of their length, at base markedly wider than pronotum (Ew/Pw 1.67), humeri distinctly rounded, moderately prominent, with only indistinct posthumeral impression; flat on disc; interstria 1 from about 1/5 to 2/5 of medial length moderately broadened and in preapical area slightly broadened, interstria 2 at same lengths slightly narrowed and clearly constricted laterally encompassing small elongate dorsal and preapical black tomentous maculae without distinct different color scale bound, interstriae except macular areas of approximately same width, slightly convex to flat; odd interstriae, especially interstria 3, 5 and 7 with only indistinct patches of whitish elongate scales and sparse black tomentous patches; striae very shallow to flat, formed by irregular rows of large round, well separated punctures, present also on interstriae, especially in posterior part of elytra; entire surface semidensely covered with recumbent to suberect elongate (l/w 3–7), whitish to yellowish scales leaving integument partially visible. Venter: densely covered with recumbent to subrecumbent, long whitish hairs and hair-like scales, clustered at margins of ventrites 3 and 4 into brush-like patches, metepisternum and epimera completely covered with yellowish elongate scales; mesosternal process flat, short, broadly concave at apex; metasternum flat, with transverse punctures and ribs; ventrite 1 with large and broad deep median impression along its entire length, semidensely punctured, ventrite 2 concave to flat, punctured; ventrite 1 1.8 × as long as ventrite 2, ventrites 1–2 combined 2.9 × as long as ventrites 3–4 combined, ventrites 3–4 combined of 1.1 length of ventrite 5. Legs: black to blackish-brown; profemora with very small teeth, meso- and metafemora with small blunt teeth with fringe of white elongate scales; femora and tibiae with relatively densely arranged recumbent to suberect elongate, yellowish, whitish and dark scales, on femora lighter scales clustered into indistinct transverse bands, tarsomeres 1–3 with suberect to erect whitish scales, onychia with recumbent thin pale hairs; onychia of anterior legs of normal length, shorter than tarsomeres 1–3 combined, protarsal tarsomere 3 slightly wider than long; claws slightly unequally long, medial protarsal and lateral meso- and metatarsal claws longer. Penis: Figs 12 d–f, its body slightly convex in distal part, broadly tapered at apex.

Female. Rostrum longer (Rl/Pl 1.77), antennal insertion beyond 0.6 of rostrum length, compared to male with less scales. Ventrite 1 markedly convex, ventrite 2 flat, both without impression. Claws equally long.

Variability. Length: ♂♂ 3.67–3.72 mm, ♀♀ 3.79–4.08 mm. This species does not show remarkable variabil- ity.

Diagnosis. Cionus canariensis is a very singular species characterized by partially visible elytral integument, short protarsal onychia with slightly unevenly long claws, small to inconspicuous dorsal and preapical maculae, and penis shape.

Comparative notes. This species is quite unique and resembles to some extent C. hauseri by the coloration of the elytra.

Biological notes. Stüben & Behne (2013) reported this species from Scrophularia (Gran Canaria, Bco. de la Coruna (female), 12.iv.2009). Z. Košťálová (pers. comm.) observed four females close to Rincón (Gran Canaria) feeding on Scrophularia calliantha Webb & Berthelot (29.vi.2015).

Distribution. Canary Islands (Gran Canaria).

Non-type specimens examined. Gran Canaria, Rincón, 29.vi.2015, 1,300 m a. s. l., Z. Košťálová obs., 4 ♀♀; “Gran Canaria” 1 ♂ KO.

Figures

FIGURES 11–12. FIGURE 11. Cionus hauseri. 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 12. Cionus canariensis. 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.