Bolianus giannae, Karner, Salvato & Uliana, 2015

Karner, Michael, Salvato, Gianfranco & Uliana, Marco, 2015, A new genus and new species of Telephanini (Coleoptera: Silvanidae) from Gabon, European Journal of Taxonomy 130, pp. 1-10 : 3-6

Bolianus giannae sp. nov.

urn:lsid:zoobank.org:act:668CE306-2286-429C-A65F-17CEE811417E

Figs 1–14

Diagnosis

As for genus.

Etymology

The species is dedicated by Gianfranco Salvato to his wife, Gianna Polo.

Material examined

Holotype

GABON: ♂, Ipassa-Makokou, 0°30’43” N, 12°48’13” E, 500 m, 25 Nov. 2013, leg. M. Pavesi ( Museo di Storia Naturale di Venezia, Venice, Italy).

Paratypes (3♂♂, 3 ♀♀)

GABON: 3 ♂♂, 2 ♀♀, same data as holotype (1 ♂ [dissected] and 1 ♀ in coll. Museo di Storia Naturale di Milano, Milan, Italy; 1 ♂ in coll. Museo di Storia Naturale del Salento, Calimera, Italy; 1 ♀ in coll. Gianfranco Salvato; 1 ♂ in coll. Michael Karner, later in coll. Forschungsinstitut Senckenberg, Frankfurt, Germany); 1 ♀, same locality as holotype, 16 Feb.–1 Mar. 2012, leg S. Biondi (in coll. Silvano Biondi, Vicenza, Italy).

Description of holotype

BODY ( Fig. 1 ). Castaneous, elongate oval, total length from apical margin of clypeus to apex of elytra 4.55 mm. Elytra darkened near base, with dark transverse maculae near middle. Antennae light castaneous, apical 2/3 of 6 th antennomere darkened, 7 th– 10 th antennomeres blackish brown, 11 th antennomere yellowish brown. Legs brown.

HEAD ( Figs 2–3 ). Eyes prominent, rounded, eye length from anterior to posterior margin 0.30 mm, eye distance across vertex 0.64 mm. Temples well defined and moderately curved, angle between temple and longitudinal axis of head 64°; head width across eyes 0.97 mm, length from apical margin of clypeus to imaginary line between hind margins of eyes 0.68 mm. Punctures on vertex 0.5 times as large as an eye facet diameter, spaces between punctures irregular, between 0.5 and about 1.5 times their diameter, somewhat irregular. Pubescence composed of semierect setae about 0.25 times as long as eye length, directed anteriorly. Microsculpture shallow, reticulate. Lateral frontal lines deep, straight, slightly converging anteriorly, almost attaining posterior margins of eyes. Central frontal line deep, anterior end not attaining frontoclypeal suture, posterior end attaining basal ridge of head. Additional impressions running close to dorsal margins of eyes from anterior fifth of eyes to basis of head. Antennae long, slender, attaining almost middle of elytra, length 2.75 mm; antennomere proportions, starting from scape, as follows: 3.1: 1.0: 1.3: 1.6: 1.7: 1.6: 1.5: 1.4: 1.4: 1.4: 2.6 ( Fig. 3 ).

PRONOTUM ( Fig. 2 ). Widest near middle, about 1.1 times as wide as head; moderately wider than long; maximum width 1.10 mm, length 1.00 mm. Area near posterior margin slightly depressed. Lateral margins with minute tubercles, which are slightly larger near anterior and posterior angles. Anterior part of lateral margin almost straight, slightly diverging towards middle, slightly sinuate from middle to base. Punctures on pronotal disk larger than on vertex, slightly smaller than an eye facet, somewhat irregular with distances between punctures ranging from 0.5 times to 2 times their diameter. Pubescence composed of semierect setae about 0.3 times as long as eye length, directed anteromedial. Microsculpture shallow, reticulate.

LEGS. Simple, slender; 2 nd and 3 rd tarsomeres lobed and with dense pubescence on soles.

ELYTRA. Oval, 1.68 times as long as pronotum, widest just in front of middle, length along suture including scutellum 2.84 mm, combined maximum width 1.68 mm. Rows of punctures on elytral disk about 2/3 as wide as interstices; pubescence composed of long, semierect setae; strial setae as long as interstrial setae; interstrial setae predominantly in single rows, in several, irregularly distributed places also in double rows; 10 th stria with 7 distinctly enlarged, deep punctures. Microsculpture absent.

ABDOMEN. Abdominal ventrites simple.

AEDEAGUS ( Figs 13–14 ). Parameres of holotype wide, parallel-sided, almost three times as long as wide; median lobe slender, lancet-shaped. Fig. 14C shows the parameres of a male paratype that were temporarily flattened under a cover slip to exhibit their shape in perpendicular view.

Variation

The paratypes vary in body length from 4.65 to 5.10 mm. Elytra of females slightly more rounded than those of males, widest behind middle.

Figures

Fig. 1. Bolianus giannae gen. et sp. nov., holotype, habitus. Scale bar = 2.0 mm.

Figs 2–4. Bolianus giannae gen. et sp. nov., holotype. 2. Head and pronotum. 3. Right antenna. 4. Detail of head. Scale bars: 2–3 = 1.0 mm, 4 = 0.5 mm.

Figs 5–8. Bolianus giannae gen. et sp. nov., paratype. 5. Ventral view of head (left mandible, maxillae and labium removed). 6. Left mandible, ventral view. 7. Left maxilla, ventral view. 8. Labium, ventral view. Scale bars: 5 = 0.5 mm, 6–8 = 0.2 mm.

Figs 9–12. Bolianus giannae gen. et sp. nov., paratype. 9. Pronotum, ventral view (right anterior leg removed). 10. Meso- and metathorax, ventral view. 11. Right anterior tarsus. 12. Abdominal ventrites. Scale bars: 9–10, 12 = 1.0 mm, 11 = 0.2 mm.

Fig. 13. Bolianus giannae gen. et sp. nov., holotype, aedeagus. A. Ventral view. B. Lateral view.

Fig. 14. Bolianus giannae gen. et sp. nov. A–B. Holotype, detail of aedeagus. A. Parameres, ventral view. B. Median lobe, dorsal view. — C. Paratype, parameres, ventral view. Scale bars = 0.2 mm.