Bruchidius planicornis Anton & Delobel 2017, sp. nov.
Creators: name: Anton, Klaus-Werner
name: Delobel, Alex
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Bruchidius
Bruchidius planicornis

description: Bruchidius planicornis sp. nov.
(Figs 14–20, 23)
Type locality. Iran, Fars province, Qualat, 29°48′13 ″N, 52°19′11 ″E, 2000–2150 m. a.s.l.
Type material. HOLOTYPE: ♂ (dissected), ‘S-IRAN, Prov. Fars, vic. / Qualat, 2000-2150 m. / Bachtal (Trockenhang) 29.48.13N, 52.19.11E / 28.IV.10, leg. D. Frenzel’ (NME). PARATYPES: ♂, ‘ IRAN, 1200 m / Prov. Azerbaydjan, / 3 km S of Margan // 1998.IV.29 / leg.: Székely K.’ (HNHM); 2 ♂♂ 1 ♀ ‘S-IRAN: Prov. Fars, vic. / Qalat village, 29°48’13’’N, / 52°19’11’’E, 2000-2150 m, / 28.IV.2010 / leg.A. Weigel #06” (NME, 1♂ MNHN); 2♀♀ (dissected) ‘ IRAN,Azerbaijan-e-Sharqi / Ghazenloo valley, 2.05. / leg.Y. Karimpour 2008’, genitalia slides ‘ Bruchidius / 08 09 16 II’, ‘ Bruchidius / 08.09.16 III’ (CKWA); 1 ♀ (dissected), ‘T [URKEY], Van Prov. 22.vi.2005 / coast nr Akdamar isl. / 1650 m, leg. K.W. Anton’, genitalia slide ‘ Bruchidius / 08 09 16 I’ (CKWA).
Description. Length: 2.8–3.0 mm, width: 1.3–1.7 mm.
Body oblong-oval; last visible tergite slanted about 50° from vertical. Integument colour mainly black, with several parts varying from yellowish-brown or reddish-brown to testaceous: antennomeres I–III (IV), with antennomere I dorsally and antennomeres II–III dorso-apically darkened, front leg at least with tarsomeres I–III, apical half of tibia and at apical quarter of femur, mid legs at least with tarsomere II and apical fifth of tibia; claws of legs always reddish-brown, whilst last tarsal segment always black. Vestiture moderately dense, not completely covering body, composed of long and moderately strong, homogeneous, pale olive-grey setae; distinctly denser and more or less whitish to pale yellowish setae at prescutellar area of pronotum, on scutellum and at basal mid of last visible tergite.
Male. Head moderately elongated, eyes bulging, maximum head width about 1.3 times width behind eyes; eyes separated by 0.26 times head width including eyes; face short and narrow, with distance between posterior rim of eye and apex of clypeus / distance between eyes = 3.0; eye cleft to about 2/5 its diameter, width at bottom of sinus composed of about four ommatidia; carina on frons well developed, shining, ending posteriorly in a blunt tubercle. Punctuation of face small and dense, vanishing in apical third of clypeus. Antenna (Figs 14–15) long, reaching to beginning of apical half of elytra; antennomeres I–II cylindrical and oblong, III subserrate and oblong, IV–X serrate, becoming gradually enlarged, flattened and cup-shaped, XI subcircular and large, antennomeres IV–V about 1.1–1.2 times as long as wide, VI as wide as long, VII–X about 1.1–1.4 times as wide as long; length of antennomeres: 1.7: 1.0: 1.5: 2.0: 2.2: 2.5: 2.5: 2.6: 2.7: 2.5: 3.7.
Pronotum campaniform, greatest width at base (W/L = 1.2), with sides bisinuate, posterior edges with faint oblique impression; disc with dense double punctuation of fine and coarse punctures.
Elytra 1.25 times as long as their combined width, widest at end of basal quarter; sides sub-parallel; scutellar area not depressed; without teeth at base of striae 3–4; striae on disc narrow, with small punctures; interstriae wide and flat, with dense and fine punctuation.
Hind femora not incrassate, at their widest 1.2 times as wide as mid femora; mesoventral margin with minute preapical denticle, ventrolateral margin scarcely sinuate opposite denticle. Hind tibiae straight, continuously widened from base to apex, twice wider at apex than width at base, with dorsomesal ventral and lateral margins complete, lateroventral margin barely visible and not reaching to apical half of tibia; apex of tibia with mucro short, its length half of width of tarsomere I at base; lateral denticle wide and acute, about twice mucro length; dorsally series of three short denticles. Tarsomere I ventrally with blunt denticle.
Abdomen telescoped, with ventrite V faintly emarginate and medially not turned out, its length medially as long as ventrite IV; ventrite I basomedially without particular arrangement of denser setae. Last visible tergite oblong subtriangular, about 1.2 times as long as wide, apical third faintly arched, with apex neither turned under nor truncated.
Genitalia. Median lobe (Fig. 17) oblong (maximum width excluding basal hood / total length = 0.25), sides parallel, briefly narrowed before apex, strongly widened apically; basal hood oblong with sides moderately convex, not emarginated apically; ventral valve large and subtriangular, with acute apical tip, basally moderately concave, laterobasally group of 8–10 setae; dorsal valve braced with moderately sclerotized, slim ring; no hinge sclerites, but instead the wall of internal sac bears pair of oblong groups of dense, long, acute flattened bristles, followed posteriorly by pair of strikingly sclerotized, irregular areas; saccus lined with two lateral rows of faintly sclerotized microtubercles, followed posteriorly by hyaline multified scales; gonopore wide and circular; spiculum gastrale (Fig. 18) short, stout, T-shaped. Basal strut (Fig. 19) with huge dorsal keel; lateral lobes cleft about 3/4 their length; apex of parameres with about 20 strong and long setae, modified with hyaline, conical flap and internal projection.
Female. Similar to male, antenna (Fig. 16) 0.4 times shorter; last visible tergite flat and its apical third not arched; ventrite V about 1.5 times as long as IV. Genitalia (Fig. 20): apical rim of tergite VIII strongly bisinuated, bursa copulatrix with single flat dorsal sclerite bearing number of small teeth; spermathecal body dark brown, u-shaped, with crescentic diverticulum, its surface covered with wide, shallow wrinkles.
Differential diagnosis. Habitus and genital morphology indicate a placement of this new species in the Bruchidius astragali species-group. Several Iranian species, a number of which remain undescribed, belong to that group of species. Several of them, including Bruchidius reitteri, B. richteri, B. spathopus, B. talyshensis, B. tragacanthae, B. virgatus, or B. varipes, show quite similar male genitalia, especially modified parameres, with two distinct apical lips. Bruchidius melanocerus, B. kaszabi, B. myobromae, B. tragacanthae or B. reitteri also possess a basal strut with strongly enlarged keel. However, such characteristics as strongly widened and flattened apical antennomeres in male, median lobe with pair of strikingly sclerotized areas at entrance to internal saccus are unique within the B. astragali species-group.
Host plants. Unknown.
Etymology. From Latin adjective planus (flat) and neuter noun cornu (horn, insect antenna).
Distribution. Iran and Turkey.
description: Published as part of Anton, Klaus-Werner & Delobel, Alex, 2017, Three new Asian species of Bruchidius (Coleoptera: Chrysomelidae: Bruchinae), pp. 161-172 in Acta Entomologica Musei Nationalis Pragae 57 (1) on pages 168-171, DOI: 10.1515/aemnp-2017-0065, http://zenodo.org/record/5319091