Bruchus nikdeli, Delobel and Sadeghi

Güçlü, Melek Güdek & Anton, Klaus-Werner, 2022, First Description of the Female of Bruchus nikdeli Delobel and Sadeghi (Coleoptera: Chrysomelidae: Bruchinae) and First Record from Turkey, The Coleopterists Bulletin 76 (1), pp. 39-44 : 40-42

BRUCHUS NIKDELI Delobel and Sadeghi , 2014

Material Examined. Erzurum Prov., Nenehatun Village, 39°57.897′N 041°24.537′E, 1,859 m, emerged from seeds of Vicia canescens L., 30.vi + 31.viii. + 03.x.2018, 2♂♂, 3♀♀, and 17.viii.2020, 2♂♂, ♀, leg. M. GÜdek GÜÇlÜ (collection of the first author, dissected ♂ [ Bruchus 180319 I] collection of the second author). ♀, Kars Prov., Center, 40°37.044′N 043°06.319′E, 1,782 m, 30.vi.2018, emerged from seeds of V. canescens , leg. M. GÜdek GÜclÜ, dissected ( Bruchus 180319 II, collection of the second author). New countrY record for TurkeY.

Description of Female. Length: 3.3–3.4 mm, width 2.1–2.2 mm. Body ( Fig. 4B ) rectangular, oval-shaped; integument black, antennomeres 1–3, labrum, apex of mandibles, and forelegs (except femoral bases and claws) yellowish to reddish-brown. Dorsal vestiture with generally shorter whitish spots as in Iranian specimens, interval 3 with two ( Fig. 4B ) or three (see Delobel and

Sadeghi 2014: fig. 1) elongate whitish spots; last visible tergite with large pair of lateral blackish spots reaching basal third ( Fig. 1G ), with setation converging towards median longitudinal ridge. Head ( Fig. 1A ) as in male, eyes separated by 0.3× head width including eyes; distance between posterior rim of eyes and apex of clypeus / distance between eyes = 2.8; width at bottom of ocular sinus composed of 7 ommatidia.Antenna measuring 0.4× body length; antennomere 4 elongate, 5–10 as long as wide; ratio length to width of antennomeres 1–11: 1.8, 1.0, 0.8, 0.8, 1.0, 1.0, 0.9, 1.1, 1.0, 1.0 and 1.7. Pronotum ( Fig. 1B ) with the ratio of maximum width to length including basal lobe = 1.7. Elytra ( Fig. 1E ) 1.1× longer than combined width. Scutellar shield ( Fig. 1C ) 1.2× as long as wide. Mesotibia ( Fig. 1D ) nearly straight, not bisinuate on the mesal side; apex simple, without mesal bifid plate. Hind tibia ( Fig. 1F ) with ventral carina setose in apical half, with mucro pointing to ventral side (male: ventral carina completely asetose, with mucro pointing to dorsal side). Abdomen with ventrite 5 not emarginate, 1.3× as long as ventrite 4 (male: 1.1×). Last visible abdominal tergite ( Fig. 1G ) flattened in apical 3/5 (male: strongly bulging in apical third), with two wide lateral longitudinal depressions in apical half ( Fig. 1H ). Terminal segments and genitalia: segment 8 short, sternite VIII strongly sclerotized, completely brown to blackish brown, with elongate spiculum; spiculum 1.5× as long as sternite VIII. Ovipositor short, predominantly sclerotized, brown to blackish-brown ( Fig. 2A ); coxite brown, apically rounded, covered with about 30 long setae of different lengths, basally followed by about 40 very short setae on blackish brown valvifer; tubuliform stylus at anterolateral margin of coxite, hidden between long setae of valvifer, with one seta at extreme apex; each vaginal palpus inter- nally with elongate and acute baculus of proctiger, baculus with three setae, the apex of baculus with transparent rim, surpassing apex of coxite; apex of the transparent rim with minute seta ( Fig. 2B ). Spermathecal body hook-like; surface densely elongate-wrinkled, the arrangement of wrinkles converging from square at base and apex to diagonal and parallel in between; apical diverticulum evenly curved and basal entry of duct ring-shaped ( Fig. 2C ).

Male. Similar to female. Antennomeres on average wider; mesotibia with double-notched denticles on the mesoapical edge ( Fig. 4A ); ventrite 5 narrow; last visible tergite convex with apical part strongly bulging, with pair of elliptical dark spots smaller than in female with broader vertical whitish vestiture extending from base to apex. Terminal segments and genitalia: median lobe elongate, 6.6× as long as wide, apical part broadened, apex triangular ( Fig. 3A ); ventral valve triangular, longer than dorsal valve, with two lateral groups of 18–20 short setae; entrance of internal sac near base of ventral valve with two short clusters of spicules ( Fig. 3B ); internal sac with two clusters of dense spicules, one elongate cluster in apical third ( Fig. 4C ), followed by second shorter cluster in middle third basally accompanied by arc-shaped sclerite with notched rim ( Fig. 3D ). Tegmen 4.0× as long as its width; lateral lobes strongly sclerotized, cleft to basal two-thirds of tegmen length ( Fig. 3E ); apical part of lateral lobes twisted diagonally towards each other, with transparent mesal wing covered with long, dense, brush-shaped setae beside large oval lobe ( Fig. 3F ); basal strut short and narrowed distally, with apical longitudinal rim. Spiculum gastrale Y-shaped, 3.5× as long as wide, lateral arms rather short and extending diagonally ( Fig. 3H ). Tergite VIII strongly sclerotized, 0.8× as long as wide, with a blunt larger denticle in the middle part of the apical rim and a shorter denticle on each side ( Fig. 3G ).

Distribution. Iran (Delobel and Sadeghi 2014), Turkey (this study).

Host Plants. Vicia canescens (Delobel and Sadeghi 2014; Nikdel et al. 2016). In this study, adults were reared from V. canescens seeds ( Fig. 4F ). Fig. 4 shows the habitat of B. nikdeli ( Fig. 4C ), host plant ( V. canescens ) flowers ( Fig. 4D ) and capsules ( Fig. 4E ).

Figures

Fig. 4. Habitus of Bruchus nikdeli: A) Male, B) Female. C) Habitat of B. nikdeli. Host plant (Vicia canescens): D) Flowers, E) Capsules, F) Adult exit hole from seed.

Fig. 1. Body parts of female Bruchus nikdeli. A) Head, B) Pronotum, C) Scutellum, D) Middle legs with meso- and metaventrites, E) Elytron, F) Hind leg, G) Last visible abdominal tergite (dorsal view), H) Abdominal ventrites.

Fig. 2. Female terminalia segments and genitalia of Bruchus nikdeli. A) Ovipositor and spermatheca, B) Ventral view of ovipositor, C) Spermatheca.

Fig. 3. Male terminalia segments and genitalia of Bruchus nikdeli. A) Median lobe (dorsal view), B) Apex of median lobe, C) Sclerotized spicules in apical portion of internal sac, D) Sclerotized spicules and sclerite in basal portion of internal sac, E) Tegmen, F) Apical part of lateral lobes, G) Tergite VIII, H) Spiculum gastrale.