Sciaphobus (Neosciaphobus) angustus, 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 : 752-753

Sciaphobus (Neosciaphobus) angustus sp. nov.

( Figs 1A–B , 4A , 5A )

Type locality. Albania, Llogara.

Type material examined. HOLOTYPE: J, ‘ Albanien, Logara [= Llogara]’ ( SMTD), provided with an additional red printed label : ‘ HOLOTYPUS, Sciaphobus angustus spec. nov., R. Borovec et J. Skuhrovec det. 2014’.

Description ( Figs 1A–B , 4A , 5A ). Body length 4.31 mm. Body blackish, apical half of rostrum and apical margin of pronotum dark brownish; legs and antennae reddish-brown, femora slightly darker, clubs distinctly darker. Elytra densely covered with light, greyish- -brown, regularly rounded, and appressed scales of unequal size; four scales across one elytral interval, only elytral interval 3 with three scales across interval; elytral interval 3 and lateral elytral intervals with irregularly scattered, slightly larger whitish scales. Pronotum with dense, transversally directed short and long oval appressed scales of the same colour as elytral ones; lateral parts with larger, long oval whitish scales, forming indistinct lateral stripes visible in lateral view. Rostrum and head with light greyish-brown, short oval appressed scales, smaller than those on pronotum and elytra.

Head ( Figs 1A–B , 4A ). Rostrum slender, 1.06× as long as wide; in basal half distinctly tapered anteriad, in apical half significantly enlarged anteriad, with slightly rounded sides, rostrum at apex 1.13× wider than at base. Frons flat, moderately finely punctate, slightly more shiny than epifrons. Epifrons regularly punctate, matt. Eyes large, distinctly projecting beyond outline of head.

Antennae moderately slender; funicle segment I 1.7× as long as wide and 1.2× as long as II; segment II 1.7× as long as wide; segments III, IV and VI isodiametric; segment V 1.1× as long as wide; segment VII 1.1× as wide as long; club three times as long as wide.

Pronotum ( Figs 1A–B ) narrow, 1.13× as wide as long; widest behind midlength, with regularly rounded sides. Disc regularly punctate, moderately shiny, distance between two punctures as wide as puncture diameter.

Scutellum small, triangular, glabrous.

Elytra ( Figs 1A–B ) narrow, long oval, 1.21× as long as wide, with humeral calli regularly rounded, not projecting laterally. Striae glabrous, narrow but visible, finely punctate.

Legs. Pro- and mesofemora with very small, almost indistinct tooth; metafemora with small, sharp, but well visible tooth. Tarsomere II 1.1× as wide as long; tarsomere III 1.5× as wide as long and 1.4× as wide as II; onychium as long as tarsomere III.

Sexual dimorphism. Unknown.

Male genitalia. Aedeagus ( Fig. 5A ) long, in ventral view with slightly rounded sides in whole length and with regularly pointed apex; in lateral view regularly curved and equally wide in whole length; apex regularly pointed, with well visible short dent.

Differential diagnosis. The species is characterized by narrower body with rostrum longer than wide, pronotum only slightly wider than long ( Fig. 1A ), with regularly rounded and not pointed appressed elytral scales, aedeagus in ventral view with rounded sides in the whole length and in lateral view with distinct drop-shaped apex ( Fig. 5A ). This set of characters easily distinguishes S. (N.) angustus sp. nov. from all other species of the subgenus.

Etymology. The name ‘ angustus ’ (narrow) refers to the main distinguishing character of the species.

Distribution. Albania.

Figures

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. 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).