ZOOSYSTEMATICA ROSSICA, 21(2): 254–269 25 DECEMBER 2012 Revision of the subgenus Kabakovia Kirejtshuk, 1979 of the genus Cryptarchopria Jelínek, 1975 (Coleoptera: Nitidulidae) and notes on systematics and evolution of the subfamily Meligethinae Ревизия подрода Kabakovia Kirejtshuk, 1979 рода Cryptarchopria Jelínek, 1975 (Coleoptera: Nitidulidae) c замечаниями по систематике и эволюции подсемейства Meligethinae A.G. KIREJTSHUK* & P.A. KIREJTSHUK А.Г. К , П.А. К ИРЕЙЧУК ИРЕЙЧУК A.G. Kirejtshuk, Zoological Institute of the Russian Academy of Sciences, 1 Universitetskaya Emb., St Petersburg 199034, Russia; CNRS UMR 7205, Muséum National d’Histoire Naturelle, CP 50, Entomologie, 45, Rue Buffon, F-75005, Paris, France. E-mail: [email protected], [email protected] *Corresponding author. P.A. Kirejtshuk, Mathematics and Mechanics Faculty, St Petersburg State University, 29 14th linia, St Petersburg, 199178, Russia. E-mail: [email protected] The new studies revealed two new species of the subgenus Kabakovia Kirejtshuk, 1979, stat. nov. [Cryptarchopria (K.) nepalensis sp. nov. from Nepal and C. (K.) ivoriensis sp. nov. from the Republic of Côte d’Ivoire] and made it possible to revise the subgenus and the compo- sition of the genus Cryptarchopria Jelínek, 1975 including the subgenera Kabakovia and Hora- kia Jelínek, 2000, stat. nov., and also to make some assumptions on evolution of the groups related to this subgenus associated with palm inflorescences, and to offer some proposals on systematics of the subfamily. Also, the synonymy of Cornutopria Endrödy-Younga, 1978 and Palmopria Endrödy-Younga, 1978, syn. nov. as well as the synonymy of Microporum C. Wa- terhouse, 1876 and Lucanopria Audisio et Cline, 2009, syn. nov. were proposed, while other “genera” erected by Audisio et al., 2009 are still regarded as problematic. Новые исследования выявили два новых вида подрода Kabakovia Kirejtshuk, 1979, stat. nov. [Cryptarchopria (K.) nepalensis sp. nov. из Непала и C. (K.) ivoriensis sp. nov. из Республики Кот-д’Ивуар], позволившие осуществить ревизию подрода и состава рода Cryptarchopria Jelínek, 1975, включающего подроды Kabakovia and Horakia Jelínek, 2000, stat. nov., а также выдвинуть предположения об эволюции близких к этому подроду групп, связанных с соцветиями пальм, и сделать некоторые предложения по системати- ке подсемейства. Предложена синонимия Cornutopria Endrödy-Younga, 1978 и Palmopria Endrödy-Younga, 1978, syn. nov., а также синониния Microporum C. Waterhouse, 1876 и Lucanopria Audisio et Cline, 2009, syn. nov., тогда как другие “роды” установленные Ауди- зио с соавторами (Audisio et al., 2009) по-прежнему рассматриваются как неясные. Key words: Indo-Malayan Region, Nepal, The Republic of Côte d’Ivoire, Coleoptera, Nitidulidae, Meligethinae, Kabakovia, revision, new species, new synonymy Ключевые слова: Индо-Малайская область, Непал, Республика Кот-д’Ивуар, Coleoptera, Nitidulidae, Meligethinae, Kabakovia, ревизия, новые виды, новая синонимия © 2012 Zoological Institute, Russian Academy of Scienсes A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA 255 INTRODUCTION Institute of the Russian Academy of Sci- ences, St Petersburg. The subfamily Meligethinae represents Optical equipment. Usual optic equip- a comparatively large and more or less uni- ment was used for material study, in partic- form group with completely anthophagous ular the stereomicroscope Olympus SCX9 bionomy during larval and imaginal instars. and inverted microscope Olympus CK 40 The genus Kabakovia Kirejtshuk, 1979 in MNHN, and also the stereomicroscope was initially proposed for a single species Leica MZ 16.0 in ZIN. which was registered in association with male inflorescences of palms (Arecaceae), RESULTS in particular Phoenix humilis Royle (=P. hanceana Naud.) (Kirejtshuk & Kabakov, Family NITIDULIDAE Latreille, 1802 1997; Jelínek, 2000). The recent study re- Subfamily MELIGETHINAE C.G. Thom- vealed new species and made it possible to son, 1859 revise the group. The mosaic distribution of characters among species of Cryptarcho- Genus Cryptarchopria Jelínek, 1975 pria Jelínek, 1975, Kabakovia and Horakia Type species: Cryptarcha infima Grou- Jelínek, 2000 formerly regarded as diagnos- velle, 1895, recent (by monotypy). tic for these three genera (Jelínek, 1975, 2000; Kirejtshuk, 1979) gave a ground to Subgenus Kabakovia Kirejtshuk, 1979, lower the rank of them to subgeneric one stat. nov. within the genus Cryptarchopria. Besides, both new species demonstrate the peculiar Type species: Pria latipes Grouvelle, conditions in the depressions at base of the 1908, recent (by monotypy). hypopygidium, which were initially con- Diagnosis. Body medium-sized (body sidered as the diagnostic character of this length 1.9–3.6 mm), suboval and usually genus. A somewhat analogous situation more narrowing posteriorly than anteriorly, has been found in some species of the genus slightly convex to subdepressed dorsally and Meligethinus Grouvelle, 1906 (in particular, moderately convex ventrally. Body coarsely M. zimbabwensis Kirejtshuk, 2011 with bi- and sparsely punctured, elytra with regular, sinuate depressions at the base of its pygid- somewhat obliquely transverse striae and ium). This circumstance allows to suppose extremely small punctures disposed behind that such variability in the related species them; alutaceous to finely microreticulated; is an evidence of the recency of transforma- uniformly pubescent and with sparse and tions of arcuate depressions at the base of short cilia along pronotal and elytral sides. both pygidium and hypopygidium and that Head moderately projecting anteriorly and the differentiation of the group including with anterior edge of frons truncate (with- these relatives has happened quite recent- out a separate stripe along anterior edge); ly The consideration of this circumstance with antennal grooves behind subpentago- made it also possible to put forward some nal mentum. 11-segmented antennae bear- ideas on the phylogeny and proposals for ing 3-segmented compact club in females the systematics of the subfamily. and 3–7-segmented compact to more or less loose club in males. Pronotum slightly MATERIAL AND METHODS convex at disk and gently sloping at subex- planate sides, widest at base and arcuately Depositories. CNC, Canadian National narrowing anteriorly, its posterior angles Collections of Insects, Arachnids and Nem- with distinct top and slightly projecting atodes, Ottawa; MNHN, Muséum National posteriorly, base not bordered. Elytra with d’Histoire Naturelle, Paris; ZIN, Zoological subexplanate and bordered sides, expressed © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 256 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA adsutural lines and separately rounded make it more reasonable to lower the rank to oblique or truncate apices leaving only of Kabakovia and Horakia, because only few apex or entire pygidium uncovered. Py- characters remain diagnostic for these taxa gidium with a pair of arcuate depressions (see the key to subgenera below). Jelnek at base. Prosternal process flattened, not (2000) mentioned as diagnostic also the curved along procoxae, more or less wid- “dorsal articulation of scape” and separated ened apically, with subtruncate or excised “clypeus” which can be scarcely traced in apex. Mesoventrite medially flattened and many specimens. In particular, C. (K.) nep- not excavate. Metepisterna somewhat wid- alensis sp. nov. has the isolated “clypeus” ened anteriorly. Hypopygidium with a pair viewed as a distinct stripe, while the frons of of bisinuate or slightly arcuate depressions C. (K.) ivoriensis sp. nov. has no trace of it. at base. Protibiae subtriangular and rather Finally, Jelínek (2000) used for diagnostics thick, finely crenellate along outer edge; ei- also the explanate sides of the pronotum, ther both meso- and metatibiae subtrapezi- but this structural feature is rather variable form or metatibia narrowing at apex along in species of Cryptarchopria sensu str. and inner edge, flattened and with a row of thick C. (K.) nepalensis sp. nov. which is in ac- setae along outer edge. Femora of usual cordance with manifesting a considerable shape or curved and with a pointed process variability in body size. at apical part of posterior edge of male. Tar- Notes on bionomy. The type species of the si with strongly lobed tarsomeres 1–3 and subgenus is quite common and some data short subcylindrical tarsomere 4; tarsomere on the bionomy has already obtained. It is 5 with strong simple claws. Tegmen with known in particular from the male palm in- deeply excised apex and somewhat thick- florescences of Phoenix humilis Royle (=P. ened lateral lobes. Penis trunk rather long hanceana Naud.) (Kirejtshuk & Kabakov, and acuminate at apex. Ovipositor of usual 1997). Jelínek (2000) described alone spe- structure. cies of Horakia collected in forests of the Comparison and notes on systematic po- northern Thailand with a local species of sition. Some characters of the African new Castanopsis (D. Don) Spach (Fagaceae) species make the distinctness of the generic and probably mountain forest palm (some taxa Cryptarchopria, Kabakovia and Hora- suppositions on this topic were published kia not quite clear, namely the dilatation by Audisio et al., 2009). There is no data on of the frons over the antennal insertions, bionomy of the new species described here, nearly straight inner edges of the antennal however, it can be supposed that both could grooves on head and almost straight depres- be also associated with male inflorescences of sions at the base of hypopygidium (neither palms. All palm species, which are known as plain arcuate nor bi-sinuate). Following host plant of Cryptarchopria sensu lato, be- the previous tradition, this species could be long to the endemic Indo-Malayan groups, erected in a new generic taxon. However, while the only species of Phoenix could pres- in addition to the dissonances in former ent a group common for the Paleotropics in “diagnostic” characters mentioned in the general. This plant genus can be more usual introduction, the new species from Nepal for inhabitance of C. (K.) latipes. demonstrates some reduction of curve in the bisinuate depressions at the base of hy- Key to subgenera of the genus popygidium and also rather peculiar sexual Cryptarchopria dimorphism in the antennae and femora. 1. Antennal grooves on prosternum well raised Futhermore, the prosternal process in each and with very distinct inner edge; hypopy- species demonstrates so great peculiarity, gidium without distinct depressions at base; which is usually characteristic of a generic elytra combined wider than long. Figs 27–28 level of group separation. These features . . . . . . . . . . . . . . . Cryptarchopria sensu str. © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA 257 [C. (C.) infima (Grouvelle, 1895); C. (C.) ka- anterior edge of prothorax; meso- and metati- bakowi Kirejtshuk, 1979; C. (C.) ponomaren- biae about half as wide as corresponding koi Kirejtshuk, 1989] femora. Male: antennal club 3–7-segmented; – Antennal grooves on prosternum not ex- meso- and metafemora with nearly straight to pressed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 emarginate posterior edge and at base about 2. Frons emarginate at anterior edge; hypopy- as wide as at the middle; metafemur widest at gidium without distinct depressions at base; apex and with a sharply acuminate subapical elytra combined wider than long. Figs 29–30 process along posterior edge. Female: anten- . . . . . . . . . . . . . . . . . . . . . . Horakia, stat. nov. nal club 3–4-segmented; meso- and metafem- [C. (H.) kubani (Jelínek, 2000), comb. nov.] ora with convex posterior edge. Larger: body – Frons truncate at anterior edge; hypopygid- length 1.8–3.6 mm. Figs 10–13, 20–26. Nepal ium with distinct depressions at base; elytra . . . . . . . . . . . . . . . . . . .C. (K.) nepalensis sp. nov. as long as or longer than wide combined. Figs – Head and pronotal integument with diffuse 1–26 . . . . . . . . . . . . . . Kabakovia, stat. nov. punctures; prosternal process wider and [see key to species below] deeply excised at apex; pronotosternal su- tures not traced; meso- and metatibiae more than half as wide as corresponding femora; Key to species of the subgenus mesofemur of both sexes with convex poste- Kabakovia, stat. nov. rior edge and at base much narrower than at 1. Body subquadrate; elytra combined about the middle; metafemur of both sexes widest as wide as pronotum and twice as long as at the middle and with convex posterior edge. pronotum; frons dilated over antennal inser- Male: antennal club 3–4-segmented; meta- tions; postocular depressions behind eyes femur without subapical process along pos- distinct; pronotosternal sutures traced at terior edge. Female: antennal club 3–4-seg- procoxal cavities; prosternal process at apex mented. Smaller: body length 1.9–2.6 mm. about twice as wide as in the narrowest place Figs 6–7, 17–19. East India, Sri Lanka, Viet- between procoxae; hypopygidium with near- nam (? Nepal) . . . . . . . . . . . . . . . . . . . . . . . . ly straight depressions along base; pygidium C. (K.) latipes (Grouvelle, 1908), comb. nov. almost completely uncovered by elytral api- ces; meso- and metatibiae about half as wide Cryptarchopria (Kabakovia) ivoriensis as corresponding femora; mesofemora at base sp. nov. only slightly narrower than at the middle. (Figs 1–5, 8–9, 14–16) Male: antennal club 5-segmented. Body length 3.3 mm. Figs 1–5, 8–9, 14–16. The Material examined. Holotype, male Republic of Côte d’Ivoire . . . . . . . . . . . . . . . . . . . (MNHN) – “Côte d’Ivoire, P. 12, loc. Lamto, . . . . . . . . . . . . . . . . . . C. (K.) ivoriensis sp. nov. date 25-11-69, A. POLLET Réc.”. – Body suboval and more narrowing posterior- Diagnosis. See the above key to species ly than anteriorly; elytra combined more or of Kabakovia, stat. nov. Besides, this new less narrower than pronotum and markedly species, in contrast to C. (K.) nepalensis less than twice as long as pronotum (about sp. nov., is somewhat lighter, more shin- 1.5 times as long as pronotum); postocular depressions behind eyes not expressed; frons ing, nearly inconspicuously pubescent and not dilated over antennal insertions; proster- more finely punctured; its head is somewhat nal process at apex markedly less than twice longer, with larger eyes and without ante- as wide as in the narrowest place between rior stripe (“clypeus”); elytra are somewhat procoxae; hypopygidium with bi-sinuate shorter and narrower at base; meso- and depressions along base; pygidium almost metatibiae are wider. This new species also completely covered by elytra or only its apex differs from C. (K.) latipes in the subtruncate remains uncovered . . . . . . . . . . . . . . . . . . . . . . . 2 apices of elytra, inconspicuous pubescence, 2. Pronotal and often head integument with more shining integument, shape of antennal transversely undulate rows of punctures; club, shape of meso- and metafemora. prosternal process narrow and subtruncate at apex; pronotosternal sutures distinct begin- Description of male (holotype). Length ning from procoxal cavities and reaching to 3.3, width 1.3, height 0.7 mm. Moderately © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 258 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA Figs 1–5. Cryptarchopria (Kabakovia) ivoriensis sp. nov. Holotype, male: body, dorsal (1); idem, ventral (2); anterior part of body, ventral (3); head, dorsal (4); median base of pronotum, scutellum and median base of elytra, dorsal (5). Body length 3.3 mm. © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA 259 Figs 6–9. Cryptarchopria (Kabakovia) latipes (Vietnam), male: body, dorsal (6); idem, ventral (7). Body length 2.3 mm. Cryptarchopria (Kabakovia) ivoriensis sp. nov. Holotype, male: penis trunk, dorsal (8); tegmen, ventral (9). Penis trunk length 0.6 mm. © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 260 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA Figs 10–13. Cryptarchopria (Kabakovia) nepalensis sp. nov. Holotype, male: body, dorsal (10); idem, ventral (11); left antenna, dorsal (12); armature of inner sac of penis, dorsal (13). Body length 3.5 mm. © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA 261 convex dorsally and ventrally; subunico- which is slightly projecting posteriorly. lourous straw reddish; integument rather Scutellum subtriangular to subsemicir- shining and covered with extremely fine yel- cular, with rounded apex, almost twice as lowish, slightly conspicuous, hairs: on head, wide as long. Elytra slightly shorter than pronotum and thoracic underside hairs wide combined, with maximum width in about twice as long as distance between their anterior third, distally gradually narrow- insertions; on elytra with somewhat longer ing to subobliquely truncate apices, which and denser hairs inserted behind obliquely are forming very small and shallow sutural transverse striae; on ventrites with rather angle, gently sloping to rather widely sub- long and dense diffuse hairs. explanate lateral edges, adsutural lines dis- Head, pronotum, metaventrite and ab- tinct in distal half. Pygidium slightly con- dominal ventrite 1 with rather small and vex, widely rounded at apex and with pair distinct punctures much smaller than eye of slightly arcuate depressions at base. Ar- facets in diameter, interspaces between cuate apex of anal sclerite scarcely exposed them about as great as puncture diameter. from under pygidial apex. Elytra with not quite regular, somewhat Ultimate labial palpomere about 3.5 obliquely transverse striae and extremely times as long as thick and somewhat nar- small punctures disposed behind them, in- rowing at apex. Mentum subpentangular, terspaces between striae somewhat less more than twice as wide as long, lateral edg- than two diameters of eye facets, striae be- es about half as long as mentum at midline. coming gradually denser towards apices. Antennal grooves distinct along inner edge; Pygidium and abdominal ventrites with postocular depressions distinct and moder- small, shallow, but distinct punctures, in- ately deep. Prosternum gently convex along terspaces between them very narrow and the middle and with process subflattened very smoothly microreticulated. Proster- and strongly widened at subtruncate apex, num with extremely fine and not quite clear its maximum width somewhat less than punctation or smooth. width of antennal club. Distance between Head subflattened and about ¾ as long mesocoxae about 1.5 times and that be- as the distance between moderately large tween metacoxae about 2.5 times as great as eyes (consisting of moderately fine facets), that between procoxae. Metaventrite sub- transverse diameter of latter about one- flattened and with weak and narrow median fifth of distance between eyes, its anterior suture. Abdominal ventrite 1 almost twice edge straight and not bordered and with as long as each of ventrites 2–4 and nearly rounded lateral angles. Lobes of labrum 1.5 times as long as hypopygidium, which is not exposed and mandibles slightly ex- shallowly and widely emarginate at apex. posed from frons. Antennae slightly longer Epipleura gradually narrowing distally, than head width, antennomere 3 almost as subhorizontal and somewhat narrower than long as scape and about twice longer than antennal club at base. antennomere 2 or antennomere 4; their Protibia about 2/3 as wide as antennal 5-segmented club composing nearly half club, finely crenellate along outer edge wid- of total antennal length, somewhat elon- ened along outer edge at base; meso- and gate and with ultimate antennomere trans- metatibiae markedly wider, subtrapeziform versely truncate at apex. Pronotum widest and with a row of small very short and dense in posterior third and regularly rounded at hairs along outer edge, spurs comparatively sides, with evenly vaulted disk and gently small and stout. Femora with nearly usual sloping to narrowly subexplanate sides, outline and rather wide, 2.5–3.0 times as anterior edge moderately trapezoidally ex- wide as prosternal process, although meso- cised, posterior edge subtruncate and with femur strongly widened at base of posterior a shallow sinuation at each posterior angle, edge and metafemur with regularly convex © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 262 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA posterior edge. Tarsi rather long (about 2/3 as long as tibiae), tarsomeres 1–3 moderate- ly strongly lobed, claws simple and narrow; protarsus about 2/3 as wide as protibia, meso- and metatarsi somewhat narrower. Aedeagus. Tegmen and penis trunk well sclerotised and very long. Etymology. The epithet of this new spe- cies is formed from the name of country of its origin, the Republic of Côte d’Ivoire. Cryptarchopria (Kabakovia) nepalensis sp. nov. (Figs 10–13, 20–26) Material examined. Holotype, male (CNC) – “NEPAL, nr. Simra, Abhabhar, 600 ft, 24 Aug.1967, Can. Nepal Exped.”; 22 paratypes, males and females (CNC, ZIN) – same data as for holotype and “25 Aug. 1967”; 1 specimen (CNC) – “NEPAL, Ktmd., 600’, Adhabhar, 4 mi. N. Simra, 27.VIII.1967, Can. Nepal Exped.”; 1 specimen (CNC) – “NEPAL, nr. Birganj, Lothar, 450 ft, 8.IX.1967, Can. Nepal Exped.”. Diagnosis. See the above key to species of Kabakovia, stat. nov. and the diagnosis Figs 14–22. Cryptarchopria (Kabakovia) ivo- of the previous new species. This new spe- riensis sp. nov. Holotype, male: prosternal pro- cies, in contrast to its consubgeners, has the cess, ventral (14); right mesofemur, ventral (15); distinct “clypeus”, transverse rows of punc- right metafemur, ventral (16). Cryptarchopria tures on head and pronotum, and distinctly (Kabakovia) latipes (Vietnam), male: prosternal expressed secondary sexual dimorphism in process, ventral (17); right mesofemur, ventral the characters of meso- and metafemora, (18); right metafemur, ventral (19). Cryptarcho- and metatibia. pria (Kabakovia) nepalensis sp. nov. Paratype, Note. The characters of this new species, male: prosternal process, ventral (20); right me- sofemur, ventral (21); right metafemur, ventral which are shared with the previous new spe- (22). Scale bar: 0.5 mm. cies, are omitted in the description below. Description of male (holotype). Length 3.6, width 1.6, height 0.8 mm. Rather convex late rows, punctures in rows (sub)contigu- dorsally and moderately convex ventrally; ous and interspaces between rows about as subunicolourous straw reddish; integument great as a puncture diameter. Prosternum dully shining and covered with extremely and abdominal ventrite 1 with indistinct fine, rather conspicuous, yellowish hairs: punctures much smaller than eye facets in on head, pronotum and thoracic underside diameter, interspaces between them about hairs 3–4 times as long as distance between as great as puncture diameter or smaller their insertions; on elytra with somewhat and alutaceous. Metaventrite with distinct longer and denser hairs, their insertions lo- and somewhat elongate punctures much cated behind obliquely transverse striae. smaller than eye facets in diameter, inter- Head and pronotum with distinct punc- spaces between them less than puncture tures slightly smaller than eye facets in di- diameter. Elytra with not quite regular, ameter and arranged in transversely undu- somewhat obliquely transverse striae and © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269 A.G. KIREJTSHUK & P.A. KIREJTSHUK. REVISION OF NITIDULID SUBGENUS KABAKOVIA 263 Figs 23–26. Cryptarchopria (Kabakovia) nepalensis sp. nov. Paratypes: hypopygidium, ventral (23); tegmen, ventral (24); penis trunk, dorsal (25); ovipositor, ventral (26). Scale bars: 0.5 mm (23), 0.3 mm (24–26). extremely small punctures disposed behind 1.5 times as long as head width and reach- them, interspaces between striae somewhat ing mesocoxae; antennomere 3 markedly less than two diameters of eye facets, striae shorter than scape, about twice as long as becoming gradually denser towards apices. antennomere 2 and about 1.5 times as long Head subflattened and about half as as antennomere 4; their 6-segmented and long as distance between eyes (consist- rather loose club slightly longer than anten- ing of moderately fine facets), transverse nomeres 2–5 combined, and with ultimate diameter of the latter about one-fourth of antennomere rounded at apex. Pronotum distance between eyes, its anterior edge widest at base and regularly rounded at straight, with isolated stripe (“clypeus”) sides, with evenly vaulted disk and gently and rounded lateral angles. Antennae about sloping to narrowly subexplanate sides, an- © 2012 Zoological Institute, Russian Academy of Scienсes, Zoosystematica Rossica 21(2): 254–269