Brachysomus (Hippomias) boroveci Yunakov, 2006

Yunakov, Nikolai, 2022, A review of the genus Brachysomus Schoenherr (Coleoptera: Curculionidae: Entiminae), Zootaxa 5193 (1), pp. 1-165 : 51-52

Brachysomus (Hippomias) boroveci Yunakov, 2006

Figs. 133 , 149 , 205 , 239B

Brachysomus boroveci Yunakov, 2006: 303 . Type locality: Greece, Lakónia.

Redescription. Measurements: Body length 1.90–2.20 mm, width 1.05–1.25 mm. Colouration: Body, antennae, and legs brown to dark-brown. Vestiture: Body densely covered with short, lanceolate, slightly apically excised, grey recumbent scales. Disc of pronotum nearly scaleless, sides densely covered with recumbent scales. Elytral interstriae, pronotum, head, antennal scape, and legs covered with short, distally evenly widened, apically rounded, suberect scales as long as 0.7–1.0x the width of an interstria.

Head: Rostrum conically narrowing from base to mid length, then almost parallel-sided, slightly transverse or as long as wide (RL/RW = 0.96–1.00). Pterygia clearly visible in dorsal view, noticeably projecting from outline of rostrum.Epifrons parallel-sided, weakly convex longitudinally, separated from vertex by slight transverse depression; with fine shallow median longitudinal sulcus, in male short and perceptible only in basal part of epifrons, more distinctly pronounced in female. Eyes large (VW/ELD in male 1.83, in female 2.08), slightly convex, not projecting from outline of head capsule, situated very high on head capsule almost at level of vertex. Vertex in male almost flat, in female weakly convex and wider. Antennae: Scape gently curved in proximal third, evenly widened distally. Funicle noticeably widened distally; funicular antennomeres: 1st and 2nd elongate, 1st somewhat longer and wider than 2nd, its sides noticeably convex; 2nd straight-sided, slightly widened distally; 3rd–7th transverse; club eggshaped, clearly set off from funicle.

Thorax: Pronotum transverse [PL/PW = 0.78–0.80 (0.79)], widest at middle, evenly convex at sides, slightly constricted anteriorly and posteriorly. Disc slightly flattened. Elytra: Broadly-oval (EL/EW in holotype 1.24; in paratype 1.23), weakly convex at sides and strongly convex at disc (especially in female), widest at middle. Base strongly sinuate. Striae linear, punctures deep, narrowly separated; spaces between punctures somewhat narrower than diameter of puncture, situated at interstrial level. Interstriae convex, shiny, 2x wider than striae. Legs: Femora moderately swollen in middle part. Protibiae slender, straight, usually not widened at apex. Male metatibiae with small mucro. First tarsomere triangular, 2nd weakly transverse, 5th fore tarsomere extending beyond apical lobes of 3rd by 0.75 length of the lobes.

Abdomen: First ventrite with posterior margin weakly sinuate. Male 5th ventrite slightly and evenly convex, without depression on apical part, with shiny flattened plate and bilateral bunches of hairs situated laterally on posterior margin. Female 5th ventrite slightly convex, posterior margin rounded. Male genitalia: Aedeagus heavily sclerotized, median lobe parallel-sided, 0.5x as long as apodemes, apex widely rounded, endophallus with two kinds of spiculae: acute and obtuse. Spermatheca: collum and ramus equally long.

Diagnosis. This species is very similar to B. simulans and B. oertzeni . From B. simulans it differs by elongate suberect setae on the elytral interstriae, very slightly developed transverse depression on the basal part of the epifrons. From B. oertzeni it differs in head shape and by nearly interrupted median longitudinal sulcus at epifrons and shape of spermatheca.

Distribution. Greece (Peloponnesus).

Bionomics. Unknown.

Type material. GREECE: Holotype, ♂ (BRc): ‘Greece—Peloponnes, Lakónia—Golas’ 24.III.1998, lgt. Fr. Štáhlavský’. Paratype, ♀ (ZIN), as holotype.

Figures

FIGURE 205. Brachysomus boroveci: A: aedeagus; B: tegmen; C: endophallic sclerite; D: spermatheca; E: head; F: antenna.

FIGURE 239. Occurrence map of Brachysomus: A: Brachysomus s. str.; B: subgenus Hippomias.

FIGURES 130–135. Brachysomus, main view. 130: B. alexeevi. 131: B. argutus 132: B. armatus 133: B. boroveci 134: B. pelex. 135: Eurosphalmus tenuicollis comb. n.

FIGURES 148–155. Brachysomus, head and pronotum: 148: B. armatus, dorsal view. 149: B. boroveci, dorsal view. 150: B. erinaceus, dorsal view. 151: idem, lateral view. 152: B. hegyessyi. 153: idem, lateral view. 154: B. setiger, dorsal view. 155: idem, lateral view.