Sciaphobus (Neosciaphobus), Scheibeli Apfelbeck, 1922

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 : 773-774

Key to the species of the subgenus Neosciaphobus

1 Elytra with conspicuous, alternate bright greenish squamose and black glabrous intervals ( Figs 3A–D ). Size: 3.90–4.90 mm. .............................. S. (N.) vittatus ( Gyllenhal, 1834)

– Elytra with all intervals squamose, greyish or brownish ( Figs 1A, C, E ). ...................... 2

2 Metafemora in both sexes with distinct tooth. Apex of aedeagus in ventral view with regularly convex sides ( Figs 5A, B, C ). ............................................................................. 3

– Metafemora in both sexes unarmed. Apex of aedeagus in ventral view with concave sides ( Figs 5D, E ). .................................................................................................................... 7

3 Rostrum slender and long, 1.1× as long as wide ( Fig. 4A ). Pronotum narrow, 1.1× as wide as long ( Fig. 1A ). Aedeagus in dorsal view with rounded sides ( Fig. 5A ). Size: 4.30 mm. ........................................................................................... S. (N.) angustus sp. nov.

– Rostrum wider and shorter, isodiametric or 1.1× as wide as long ( Figs 4D, K, L ). Pronotum wider, 1.2–1.4× as wide as long ( Figs 1C, E, G ). Aedeagus in ventral view parallelsided ( Figs 5B, C, F ). ...................................................................................................... 4

4 Metatarsi slender, onychium 1.3–1.4× as long as tarsomere III. Femora blackish ( Figs 2J, L ). Aedeagus in lateral view with drop-shaped apex ( Fig. 5F ). Size: 3.60–4.10 mm. ....... ............................................................. S. (N.) subnudus ( Desbrochers des Loges, 1892)

– Metatarsi shorter, onychium at most 1.1× as long as tarsomere III. Femora brownish ( Figs 1F, H ). Aedeagus in lateral view regularly pointed ( Figs 5B, C ). ................................... 5

5 Elytra with uniformly coloured greyish scales of equal size. Colouration of elytral interval 7 almost identical but slightly paler than that of other intervals, with only slightly more whitish scales ( Fig. 1D ). Striae distinctly wider than intervals. Pronotum, head, rostrum and femora with wide scales of uniform colour ( Fig. 1C ). Parthenogenetic species. Size: 3.60–4.60 mm. .................................................... S. (N.) ningnidus ( Germar, 1824)

– Elytra bicolorous, with smaller brownish and larger greyish scales. Elytral interval 7 distinctly paler than other intervals, covered with whitish scales ( Figs 1F, H ). Striae narrower than intervals. Pronotum, head, rostrum and femora with wide and narrow scales of different colour ( Figs 1E, G ). Amphigonic species. ............................................................... 6

6 Elytra wider, 1.26–1.28× as long as wide ( Figs 1E, G ). Metafemora with large tooth. Aedeagus regularly tapered in apical half in lateral view ( Fig. 5B ). Size: 3.70–4.50 mm. .... ................................................................................. S. (N.) globipennis Apfelbeck, 1922

– Elytra narrower, 1.32–1.34× as long as wide ( Figs 1I, K ). Metafemora with small tooth. Aedeagus tapered in apical quarter in lateral view ( Fig. 5C ). Size: 3.10–3.90 mm. .......... .......................................................................................... S. (N.) reitteri ( Stierlin, 1884)

7 Eyes flat, barely projecting beyond outline of head ( Figs 4G, H ). Scutellum small, triangular, glabrous ( Figs 2A, C ). Rostrum wide and short ( Figs 4G, H ). Elytral intervals 7–10 with green scales, scales on interval 7 denser than on other intervals, hiding integument ( Figs 2B, D ). Elytral striae conspicuous, wide. Size: 4.40–5.80 mm. ................................ ...................................................................................... S. (N.) scheibeli Apfelbeck, 1922

– Eyes convex, distinctly projecting beyond outline of head ( Figs 4I, J ). Scutellum big, subquadrate, densely squamose ( Figs 2E, G ). Rostrum slender and long ( Figs 4I, J ). Elytral intervals 6–10 with grey scales, scales on interval 7 equally sparse as on other intervals, not hiding integument ( Figs 2F, H ). Elytral striae inconspicuous, narrow. Size: 5.10–7.30 mm. .......................................................... S. (N.) squalidus ( Gyllenhal, 1834)

Figures

Fig. 3. Habitus of Neosciaphobus species: Sciaphobus vittatus (Gyllenhal, 1834): male (A – dorsal view, B – lateral view), female (C – dorsal view, D – lateral view).

Fig. 1. Habitus of Neosciaphobus species. Sciaphobus angustus sp. nov.:Holotype, male (A – dorsal view, B – lateral view); S. ningnidus (Germar, 1824): female (C – dorsal view, D – lateral view); S. globipennis Apfelbeck, 1922: male (E – dorsal view, F – lateral view), female (G – dorsal view, H – lateral view); S. reitteri (Stierlin, 1884): male (I – dorsal view, J – lateral view), female (K – dorsal view, L – lateral view).

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. 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. 2. Habitus of Neosciaphobus species. Sciaphobus scheibeli Apfelbeck, 1922: male (A – dorsal view, B – lateral view), female (C – dorsal view, D – lateral view); S. squalidus (Gyllenhal, 1834): male (E – dorsal view, F – lateral view), female (G – dorsal view, H – lateral view); S. subnudus (Desbrochers des Loges, 1892): male (I – dorsal view, J – lateral view), female (K – dorsal view, L – lateral view).