Chrysolina (Timarchoptera) olegkabakovi, Bieńkowski, 2023

Bieńkowski, Andrzej O., 2023, A New Species Of The Subgenus Timarchoptera Motschulsky, 1860 Of The Genus Chrysolina Motschulsky, 1860 (Coleoptera, Chrysomelidae), Acta Zoologica Academiae Scientiarum Hungaricae 69 (1), pp. 25-37 : 28-32

publication ID	https://doi.org/ 10.17109/AZH.69.1.25.2023
persistent identifier	https://treatment.plazi.org/id/03AA2471-426D-6F59-2A2F-FD83FD40FE56
treatment provided by	Felipe
scientific name	Chrysolina (Timarchoptera) olegkabakovi
status	sp. nov.

Treatment

Chrysolina (Timarchoptera) olegkabakovi sp. n.

Description. Male (holotype). Head and pronotum green with bluish green lateral sides of pronotum, elytra purple marginated with golden green basally, laterally and along suture, scutellum bluish black, ventral side of body blue, legs green, antennae entirely blue ( Fig. 3 View Fig ). Dorsal side distinctly microreticulate (shagreen), moderately shining. Last maxillary palpomere oval, obliquely truncate, 1.2× as long as wide, as wide as previous palpomere ( Fig. 2 View Fig ). Antennal insertion 3.8× closer to clypeus than to eye. Pronotum ( Fig. 3 View Fig ) 1.7× as wide as long (pronotal length measured along mid-length from anterior margin to posterior margin). Lateral side of pronotum evenly convex, without emargination before base, because of that, posterior angles not projecting laterally. Pronotal callus convex along entire length. Pronotal lateral impression wide, very shallow, obsolete along most part of its length, moderately deep basally. Pronotal disc covered by almost homogeneous dense fine punctures and dense micropunctures which smaller than cells of microreticulation. Lateral impression covered by numerous punctures much larger than those at pronotal disc. Pronotal anterior side marginate and densely ciliate. Anterior setiferous pore of pronotum absent. Prothoracic hypomeron moderately convex, with shallow wide impression covered by fine wrinkles laterally. Basal fold of prothoracic hypomeron weak. Anterior edging of metasternum present. Elytral base not broader than pronotal base. Humeral callus obsolete. Sutural furrow distinct at apical slope of elytron. Elytron slightly wrinkled, covered by entirely irregular dense double punctures: mixed large and fine ones. Elytral epipleuron inclined outside along entire length, sparsely ciliate apically. Hind wing strongly reduced. Tarsomeres 1–3 moderately broadened, 3rd tarsomere slightly narrower than the 1st. Underside of tarsomeres 1–3 entirely pubescent. Claw tarsomere without apical denticles beneath. Pygidium with distinct longitudinal furrow along almost entire length except near apex. Last abdominal sternite evenly convex, with apical margin straight. Aedeagus ( Figs 2 View Fig & 3 View Fig ) arc-shaped, flattened dorso-ventrally, with apical lobe rounded, separated by narrow constriction laterally, with apical orifice short, rounded, dorsal side with narrow furrow before orifice. Flagellum short, exposed, simple, tube-shaped, funnel-shaped at apex. Body length 7.8 mm.

Differential diagnosis. The new species is morphologically closest to Ch. lomakini and is distinguished by the features given below in the key. Besides that, it looks like externally Ch. (Chrysocrosita) spectabilis ( Motschulsky, 1860), mostly by the dorsal coloration ( Fig. 4 View Fig ). To clarify the differences between view (Siberia: Krasnoyarsk Krai). (After MIKHAILOV (2002): 3; others orig.)

the new species and Ch. spectabilis, the lectotype of the latter was studied (it was designated by BIEŃKOWSKI 2007) ( Fig. 4 View Fig ). Although both type specimens of Ch. spectabilis, lectotype and paralectotype, are females, and the new species is described based on a male, there are clear specific differences between them. Lectotype of Ch. spectabilis differ from the new species in the presence of distinct basal fold of prothoracic hypomeron, pronotal lateral impression developed along basal 2/3, covered by punctures about as large as those at pronotal disc, and last maxillary palpomere as long as broad ( Fig. 4 View Fig ). I also studied males of Ch. spectabilis collected together with females, their aedeagus does not have a spatulate apical lobe separated by constriction.

Material examined: Chrysolina olegkabakovi sp. n.: holotype, male ( ZIN): Khabarovsk Krai, Komsomolsk Distr., Miao Chan ridge, 8.8.1956, O. N. Kabakov leg.

Etymology. I consider it my duty to name the species after Oleg Nikolaevich Kabakov (1928–2009), Russian geologist and entomologist whom the author knew personally, and thereby honor his memory. The holotype of the new species was collected by O. N. Kabakov during an expedition to the Komsomolsk District of the Khabarovsk Krai, when he discovered the world-famous tin deposit and founded the city of Solnechny ( KABAKOV 2008).