Sciaphobus (Sciaphobus) formaneki, Borovec & Skuhrovec, 2015

Borovec, Roman & Skuhrovec, Jiří, 2015, A review of Sciaphobus (Neosciaphobus) and descriptions of new species of Sciaphobus s. str. (Coleoptera: Curculionidae: Entiminae), Acta Entomologica Musei Nationalis Pragae 55 (2), pp. 745-785 : 774-776

Sciaphobus (Sciaphobus) formaneki sp. nov.

( Figs 4S–T , 5J , 7I–L )

Type locality. Montenegro, Sutorina.

Type material. HOLOTYPE: J, ‘[ Montenegro] Sutorina , Paganetti [lgt.]’ ( NMPC) . PARATYPE: 1 ♀, ‘[ Montenegro] Krivosije [= Krivošije], Paganetti [lgt.]’ ( NMPC).Both specimens are provided with additional red printed label:‘HO- LOTYPUS [or PARATYPUS, respectively], Sciaphobus formaneki spec.nov., R.Borovec et J. Skuhrovec det.2014’.

Description ( Figs 4S–T , 5J , 7I–L ). Body length 3.88 mm (holotype) and 3.81 mm (paratype). Body blackish, epistome dark brownish; legs and antennae red brownish, femora except of knees darker. Elytra densely covered with greenish appressed scales, drop-shaped, 4–5 scales across one elytral interval. Each interval with one dense, regular row of short, semiadherent, whitish, piliform setae, slightly longer than length of one appressed scale, hardly visible in lateral view. Pronotum with dense, transversally directed long oval greenish appressed scales, narrower than elytral ones with irregularly scattered semiadherent whitish, transversally directed piliform setae; lateral parts with scales wider, not forming lateral stripes. Rostrum and head with short oval greenish appressed scales, similar to scales on elytra.

Head ( Figs 4S–T , 7I–L ). Rostrum short and wide, 1.06–1.07× as wide as long; in basal half tapered anteriad, in apical half distinctly enlarged anteriad with slightly rounded sides, at apex 1.17–1.21× as wide as at base. Rostrum flat, on same level as head. Frons shallowly depressed, horseshoe-shaped, glabrous and shiny, separated from epifrons by narrow but distinct carina, indistinctly angular to epifrons. Epifrons regularly tapered basad, punctate, matt. Interocular space with narrow, short, longitudinal fovea. Eyes large, moderately projecting beyond outline of head.

Antennae in female slenderer than in male; in both sexes funicle segments I and II equally long, conical, segment I wider than segment II; in male segment I twice as long as wide; segment II 2.6× as long as wide; segments III and IV 1.6× as long as wide; segments V and VI 1.5× as long as wide; segment VII 1.3× as long as wide; in female segment I 2.1× as long as wide; segment II 2.8× as long as wide; segment III 2.2× as long as wide; segment IV 1.9× as long as wide; segments V and VI 1.6× as long as wide and segment VII 1.4× as long as wide; clubs 2.5–2.6× as long as wide.

Pronotum ( Figs 7I–L ) wide, 1.28–1.31× as wide as long; widest at midlentgh, with regularly rounded sides, slightly more tapered anteriorly than posteriorly; disc finely, densely regularly punctate, distance between two punctures shorter than puncture diameter, punctures hidden by scales.

Scutellum small, triangular, glabrous, shiny.

Elytra ( Figs 7I–L ) narrow, 1.54–1.56× as long as wide with subparallel sides, posteriad narrowly tapered; humeral calli rounded, not laterally projecting. Striae narrow, punctate; intervals flat.

Legs. All femora unarmed in both sexes. Tarsomere II 1.1–1.2× as long as wide; tarsomere III moderately small, 1.4–1.5× as wide as long, as long as II; onychium in male equally long and in female 1.2× as long as tarsomere III.

Sexual dimorphism. For more details see antennae and onychium.

Male genitalia. Aedeagus ( Fig. 5J ) long and slender, widest at base in ventral view, subparallel-sided with indistinctly concave sides, apex elongate, regularly tapered to slender point with faintly concave sides; widest at base in lateral view, regularly curved and regularly tapered from base to apex, only tip of apex somewhat elongate.

Female genitalia. Spermatheca ( Fig. 6H ) U-shaped; cornu somewhat curved, tapered, rounded at apex; corpus large; ramus small, subtrapezoidal, about as long as wide; nodulus shorter than ramus, rounded.

Differential diagnosis. Rostrum on the same level as head, and frons separated from epifrons by narrow carina place S. (S.) formaneki sp. nov. among Sciaphobus s. str. in the group of four species without erect setae on elytra. The new species is very similar to S. (S.) abbreviatus from Italy in narrow body with subparallel elytra, large size and green appressed scales ( Figs 7I, J ). Sciaphobus (S.) formaneki sp. nov. is easily separated from S. (S.) abbreviatus (characters of the latter in parentheses) by metafemora in both sexes unarmed (distinctly toothed), rostrum longer, 1.06–1.07× as wide as long (1.22–1.25×), scutellum triangular, glabrous (quadrate, squamose), funicle segments I and II equally long (segment II distinctly longer than I), aedeagus with long and slender apex in dorsal and lateral view (apex short and wide in dorsal and lateral view), and spermatheca with ramus subtrapezoidal, isodiametric (with cylindrical ramus), three times as long as wide like in S. (S.) abbreviatus .

Etymology. The species is named after eminent Czech entomologist, Romuald Formánek (1857–1927), specialist on Entiminae , in whose collection we found both specimens.

Distribution. Montenegro.

Figures

Fig. 4. Rostra of Neosciaphobus and Sciaphobus (s. str.) species: Sciaphobus angustus sp. nov., holotype, male (A); S. globipennis Apfelbeck, 1922, male (B), female (C); S. ningnidus (Germar, 1824), female (D); S. reitteri (Stierlin, 1884), male (E), female (F); S. scheibeli Apfelbeck, 1922, male (G), female (H); S. squalidus (Gyllenhal, 1834), male (I), female (J); S. subnudus (Desbrochers des Loges, 1892), male (K), female (L); S. vittatus (Gyllenhal, 1834), male (M), female (N); S. abbreviatus (Desbrochers des Loges, 1871), male (O), female (P); S. dorsualis (Gyllenhal, 1834), male (Q), female (R); S. formaneki sp. nov., holotype, male (S), paratype, female (T); S. pelikani sp. nov., holotype, male (U), paratype, female (V); S. rasus (Seidlitz, 1867), male (W), female (Y).

Fig. 5. Aedeagus of Neosciaphobus and Sciaphobus (s. str.) species; Sciaphobus angustus sp. nov., holotype (A); S. globipennis Apfelbeck, 1922 (B); S. reitteri (Stierlin, 1884) (C); S. scheibeli Apfelbeck, 1922 (D); S. squalidus (Gyllenhal, 1834) (E); S. subnudus (Desbrochers des Loges, 1892) (F); S. vittatus (Gyllenhal, 1834) (G); S. abbreviatus (Desbrochers de Loges, 1871) (H); S. dorsualis (Gyllenhal, 1834) (I); S. formaneki sp. nov.: holotype (J); S. pelikani sp. nov.: holotype (K); S. rasus (Seidlitz, 1867) (L).

Fig. 7. Habitus of Sciaphobus (s. str.) species. Sciaphobus abbreviatus (Desbrochers des Loges, 1871), male (A – dorsal view, B – lateral view), female (C – dorsal view, D – lateral view); S. dorsualis (Gyllenhal, 1834), male (E – dorsal view, F – lateral view), female (G – dorsal view, H – lateral view); S. formaneki sp. nov., holotype, male (I – dorsal view, J – lateral view), paratype, female (K – dorsal view, L – lateral view).

Fig. 6. Spermatheca, male tegmen and sternite IX, female ovipositor and sternite VIII of Neosciaphobus and Sciaphobus (s. str.) species; Spermatheca of Sciaphobus globipennis Apfelbeck, 1922 (A); S. ningnidus (Germar, 1824) (B); S. reitteri (Stierlin, 1884) (C); S. scheibeli Apfelbeck, 1922 (D); S. squalidus (Gyllenhal, 1834) (E); S. subnudus (Desbrochers des Loges, 1892) (F); S. vittatus (Gyllenhal, 1834) (G); S. formaneki sp. nov.: paratype (H); S. pelikani sp. nov.: paratype (I); S. rasus (Seidlitz, 1867) (J). Tegmen of Sciaphobus scheibeli (K); S. vittatus (L). Male sternite IX of Sciaphobus scheibeli (M). Ovipositor of Sciaphobus ningnidus (N). Female sternite VIII of Sciaphobus ningnidus (O).