Sciaphobus (Neosciaphobus) reitteri ( Stierlin, 1884 )

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 : 762-763

Sciaphobus (Neosciaphobus) reitteri ( Stierlin, 1884)

( Figs 1I–K , 4E–F , 5C )

Sciaphilus reitteri Stierlin, 1884: 86 (original description).

Sciaphobus (Neosciaphobus) reitteri: WINKLER (1932) : 1469 (catalogue); DALLA TORRE et al. (1937): 162 (catalogue); BOROVEC (2013): 385 (catalogue).

Type locality. ‘Bosnien’.

Type material examined. LECTOTYPE (present designation):J (3.62 mm long), ‘ Bosnien [handwritten] / Coll. Stierlin [printed] / S. Reitteri Strl. [original handwritten label with blue margins] / HOLOTYPUS [red, printed] / col. DEI Eberswalde [printed] / LECTOTYPUS Sciaphilus reitteri Stierlin, 1884 , R. Borovec et J. Skuhrovec desig. 2014 [red, printed] / Sciaphobus reitteri R. Borovec et J. Skuhrovec det. 2014 [printed]’ ( SDEI).

Additional material examined. BOSNIA AND HERZEGOVINA: CENTRAL BOSNA: Donji Vakuf , 27.v.1987, 1 spec., J. Kendler lgt. ( JFHC) ; Travnik , 5 spec., Brandis lgt. ( HNHM, NHMW). HERZEGOVINA- NERTVA: Jablanica, 3 spec., 14.vi.1901 ( SDEI, SMTD) ; Konjic , 1 spec. ( NMPC) ; Mostar , 1 spec. ( RBSC) ; SARAJEVO: Bjelašnica Mts. , 4 spec. ( HNHM) ; Ilidža , 24 spec., Apfelbeck lgt.( HNHM, NHMW, SDEI, SMTD) ; Ivan planina Mts., 8 spec. ( HNHM, SMTD) ; Sarajevo , 3 spec., Apfelbeck lgt. ( NHMW), 14 spec. ( HNHM, SDEI, SMTD) ; Pazaridž [= Pazarič], 1 spec., Apfelbeck lgt. ( NHMW) . CROATIA: DUBROVNIK- NERTVA: Trpanj , 1 spec. ( NMPC) .

Redescription ( Figs 1I–K , 4E–F , 5C ). Body length 3.09–3.94 mm. Body black, frons reddish, antennae and legs reddish brown, clubs and tarsi in some specimens somewhat darker. Elytra densely covered with small, short oval, brown greyish scales, 5–6 scales across one interval, integument hardly visible, with irregularly scattered larger, grey-whitish scales; larger grey- whitish scales form longitudinal stripe in basal two thirds of elytral interval 7 and short longitudinal spot in basal parts of elytral intervals 4 and 8; elytral intervals with 1–2 irregular rows of indistinct, short, adherent slender setae. Pronotum densely covered with similar small brownish and larger greyish scales, integument hardly visible, greyish scales form distinct lateral stripes and indistinct two stripes on disc; disc with scattered slender short adherent setae, directed transversally. Head and rostrum with sparse, narrow, long oval appressed scales, obliquely directed posteriad, leaving distinct space between scales and with wider, short oval scales around eyes.

Head ( Figs 1I–K , 4E–F ). Rostrum in both sexes isodiametric; in basal half weakly tapered anteriad, with straight sides, in apical half distinctly enlarged anteriad, with straight sides, at apex 1.08–1.16× as wide as at base. Frons flat, glabrous, impunctate, shiny. Epifrons in middle part finely, in lateral parts coarsely punctate, shiny. Eyes small, convex, distinctly projecting beyond outline of head.

Antennae in females slenderer than in males; in males funicle segment I 1.8× as long as wide; segment II equally long as segment I, 2.2–2.3× as long as wide; segments III–V 1.2–1.3× as long as wide; segments VI and VII 1.1× as long as wide; in females segment I 2.2–2.3× as long as wide; segment II 1.1× as long as segment I and 2.7–2.8× as long as wide; segments III–V 1.5× as long as wide; segment VI 1.3× as long as wide and segment VII 1.2× as long as wide; clubs 2.5–2.7× as long as wide.

Pronotum ( Figs 1I–L ) 1.21–1.29× as wide as long, widest behind midlength, with distinctly rounded sides, anteriad more tapered than posteriad; disc regularly and densely punctate, distance between two punctures shorter than puncture diameter, intervals shiny; disc with thin, sometimes invisible, impunctate stripe.

Scutellum small, triangular, glabrous.

Elytra ( Figs 1I–L ) in males long oval, in females oval, 1.32–1.34× as long as wide; widest at midlength, with distinctly rounded sides and without projecting humeral calli; striae punctate, narrow, intervals wide, almost flat.

Legs. Pro- and mesofemora in both sexes very small, almost indistinct, metafemora small but well visible. Tarsomere II 1.1× as wide as long; tarsomere III 1.1–1.3× as wide as long and 1.4–1.6× as wide as II; onychium 0.9× as long as tarsomere III.

Sexual dimorphism. For more details see antennae and elytra.

Male genitalia. Aedeagus ( Fig. 5C ) long and slender, in ventral view parallel-sided, apex regularly pointed, subtriangular; in lateral view regularly curved and of equal width in whole length, in apical quarter regularly tapered.

Female genitalia. Spermatheca ( Fig. 6C ) U-shaped, with very long and curved cornu and corpus; ramus and nodulus small, rounded, equally long and wide.

Differential diagnosis. The smallest species of the subgenus separated among species with metafemora with tooth by its bicolorous elytra. The other species having these two characters, S. (N.) globipennis , differs in elytra wider, 1.26–1.28× as long as wide ( Figs 1E, G ) and aedeagus regularly tapered in apical half in lateral view ( Fig. 5B ), while S. (N.) reitteri has elytra narrower, 1.32–1.34× as long as wide ( Figs 1I, K ) and aedeagus tapered in apical quarter in lateral view ( Fig. 5C ).

Distribution. Bosnia and Herzegovina ( BOROVEC 2013), and Croatia (unpublished data).

Remarks. STIERLIN (1884) described the species based on unknown number of specimens and stated the length 3.8 mm and ‘Bosnien’ as locality. We found one male specimen in Stierlin’s collection (SDEI). The specimen bears an additional label ‘HOLOTYPUS’ that was presumably attached by one of the former curators, however, the label has no relevance. The primary description does not indicate the number of specimens used and Stierlin’s collection was spread among several institutions therefore we cannot exclude the possibility of existence of additional specimens. Therefore we designate a lectotype to fix the name and prevent future misinterpretation. Since the existence of other syntypes cannot be excluded, we designate one male as a lectotype to stabilize the nomenclature in the group.

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).

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).