Sciaphobus (Neosciaphobus) subnudus ( Desbrochers des Loges, 1892 )

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 : 769-771

Sciaphobus (Neosciaphobus) subnudus ( Desbrochers des Loges, 1892)

( Figs 2I–L , 4K–L , 5F )

Sciaphilus subnudus Desbrochers des Loges, 1892: 114 (original description).

Sciaphobus (Sciaphobus) subnudus: WINKLER (1932) : 1470 (catalogue); DALLA TORRE et al. (1937): 162 (catalogue). Sciaphobus (Neosciaphobus) subnudus: BOROVEC (2013) : 385 (catalogue).

Type locality. Original type locality ‘Grèce’, here changed due to the neotype designation to: Greece, Epirus Region, Koritiani.

Type material examined. NEOTYPE (present designation): J (dissected), ‘ GREECE occ., 19.5.1997, Koritiani env. pr.Igoumenitsa, 100 m a.s.l., S. Benedikt lgt.[printed] / NEOTYPUS Sciaphilus subnudus Desbrochers, R. Borovec et J. Skuhrovec des. 2014 [red, printed] / Sciaphobus subnudus (Desbrochers) , R. Borovec et J. Skuhrovec det. 2014 [printed]’ ( NMPC).

Additional material examined. GREECE: EPIRUS: Koritiani env., pr. Igoumenitsa, 19.v. 1997, 100 m., 1 ♀, S. Benedikt lgt. ( SBPC).

Description ( Figs 2I–L , 4K–L , 5F ). Body length 3.56 (neotype) to 4.06 mm. Body black; antennae reddish-yellow with apical part of clubs gradually darker; femora blackish, knees, tibiae and tarsi reddish-brown. Elytra with small, short oval, greyish-white with faint greenish shine, dense appressed scales; scales did not completely hiding integument, 6–7 scales across one elytral interval. Pronotum with larger, transversally orientated long oval scales. Head with rostrum with appressed scales of unequal size, short to long oval, leaving glabrous part in middle part of head and rostrum.

Head ( Figs 2I–L ; 4K–L ). Rostrum short, in female wider, in male 1.07× as wide as long, in female 1.13× as wide as long; basal part subparallel-sided with rounded sides, apical half distinctly enlarged apicad with almost straight sides, at apex 1.23–1.29× wider than at base. Frons glabrous, moderately shiny, flat, indistinctly separated from epifrons. Epifrons coarser punctate, matt. Interocular space with narrow, short, longitudinal fovea. Eyes small, moderately convex and projecting beyond outline of head.

Antennae in females with slenderer segments I and II; funicle segments I and II in both sexes equally long; in male segments I and II 1.6× as long as wide; in female segments I and II twice as long as wide; in both sexes segments III–VI 1.4–1.5× as long as wide; segment VII 1.1–1.2× as long as wide, clubs 2.2–2.4× as long as wide.

Pronotum ( Figs 2I–L ) wide and short; in male 1.23×, in female 1.28× as wide as long, widest at about midlength, with distinctly rounded sides, more tapered anteriad than posteriad; disc shiny, coarsely punctate, distance of two punctures shorter than puncture diameter; punctures gradually smaller behind anterior margin; disc of pronotum with narrow and short, longitudinal, ill-defined impunctate stripe.

Scutellum small, triangular, glabrous.

Elytra ( Figs 2I–L ) oval; narrower in male than in female, in male 1.62× as long as wide, in female 1.50× as long as wide, widest around midlength, with rounded sides; humeral calli regularly rounded, not projecting laterally; intervals almost flat; striae narrow, punctate.

Legs. Male profemora with very small, almost indistinct tooth; mesofemora with small but distinct tooth and metafemora with bigger, sharp, distinct tooth. Female pro- and mesofemora unarmed and metafemora with small, but distinct tooth. Tarsi slender and moderately long; tarsomere II 1.1–1.2× as wide as long; tarsomere III 1.3–1.4× as wide as long and 1.3–1.4× as wide as II; onychium long, 1.3–1.4× as long as tarsomere III.

Sexual dimorphism. For more details see rostrum, antennae, pronotum, elytra and femora.

Male genitalia. Aedeagus ( Fig. 5F ) long and slender, parallel-sided with apex regularly pointed in ventral view; regularly curved and equally wide in whole length in lateral view, apex regularly tapered, point with small, drop-shaped enlarging.

Female genitalia. Spermatheca ( Fig. 6F ) with equally long ramus and nodulus, nodulus somewhat wider than ramus.

Differential diagnosis. The only species with slender tarsi and long onychium distinctly exceeding tarsomere III. Except for the tarsi, S. (N.) subnudus has femora blackish ( Figs 2I–L ) and aedeagus with drop-shaped apex in lateral view ( Fig. 5F ), similar only to that of S. angustus sp. nov. ( Fig. 5A ), which has elytra in male 1.21× as long as wide (1.62× as long as wide in S. (N.) subnudus ) ( Fig. 1A ) and 4 scales across one elytral interval (6–7 scales in S. (N.) subnudus ).

Distribution. Greece ( BOROVEC 2013).

Collection circumstances. Both specimens were collected by sweeping of a small xerothermic meadow exposed to south, with partly overgrown vegetation (S. Benedikt, pers. comm.). Remarks. The species was described from Greece without precise locality data, most likely according to a single specimen, as there is no length span or description of sexual dimorphism in the original description ( DESBROCHERS DES LOGES 1892). According to Hélène Perrin (pers. comm.) there is no specimen bearing the name subnudus in Desbrochers’s (MNHN) collection under genera Sciaphilus , Sciaphobus or Eudipnus thus we consider the original type material lost. Hereby we designate a neotype according to the Articles 74 and 75 of the Code (ICZN 1999) to unequivocally assign the name to a concrete species. Because the original type locality is vague we selected a specimen recently collected in Greece and well fitting the original description.

Figures

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).

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. 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).

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).