Laccobius (Glyptolaccobius) hanka Gentili &amp; Fikaček 2009, sp. nov.
Creators: name: Gentili, Elio
name: Fikaček, Martin
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydrophilidae
Laccobius
Laccobius hanka

description: <i>Laccobius</i> (<i>Glyptolaccobius</i>) <i>hanka</i> sp. nov. (Figs. 2) <b>Type locality.</b> India, Arunachal Pradesh, 1 km N of Bhalukpong, 27°01′21″N 92°38′06″E, 240 m a.s.l. <b>Type material.</b> HOLOTYPE: J (NMPC): ‘INDIA, Arunachal Pradesh (16a) / 1 km N of Bhalukpong / 7–8.V. 2008, 240 m / 27°01′21″N 92°38′06″E / Fiká&amp;ccaron;ek, Podskalská, Šípek lgt. // seepage: wet rock with moos [= moss] / and <i>Nostoc</i> below steep slope / with tropical evergreen forest’. PARATYPES: <b>INDIA: ARUNACHAL PRADESH:</b> same data as holotype, 26 spec. (KSEM, MSNV, NMPC). <b>Description.</b> Total length 1.45–1.85 mm (holotype: 1.60 mm), total width 0.90–1.10 mm (holotype: 1.00 mm). Body widely oval, convex, maximum length / maximum width ratio 1.6; maximum width between anterior elytral third and elytral midlength. Head. Coloration shining black, with rare and faint punctures, surface smooth without microsculpture; ‘systematic punctures’ indistinct; anterolateral branches of frontoclypeal suture conspicuous at 100×. Labrum black, trapezoid, without specula; anterior margin nearly straight, slightly emarginated medially; lateral margins oblique, posterior margin straight. Eyes oblong, oblique, closest to each other posteriorly, not protruding laterad, separated by distance equal to 2.5× of one eye; postocular portion of tempora short. Mentum flat or slightly convex, smooth without punctures, emarginated anteriorly. Submentum and gula smooth. Maxillary palpi yellowish; palpomere 1 thin and short; palpomeres 2 and 3 nearly equal in length, both dilated at apex; palpomere 4 elongate, nearly twice as long as palpomere 3, symmetrical, inner and outer margin convex, apex truncate. Eight antennomeres; scape longer than antennomeres 2–4 combined; pedicel cone-shaped; intermediate antennomeres (antennomeres 3–4) very short; cupule asymmetrical, oval in ventral view, crescent-shaped and emarginate in dorsal view; antennal club loose, with densely arranged setae, antennomeres 6 and 8 nearly equal in length, antennomere 6 wider, antennomere 7 shorter and narrower. Thorax. Pronotum transverse, 0.38× as long as wide, widest at posterior margin; blackish with yellowish, posteriorly widened lateral margins, yellow space reaching width of eye; surface smooth, without microsculpture. Prosternum black, with longitudinal keel. Scutellar shield equilateral, dark, impunctate. Mesoventrite with longitudinal keel, tuberculate anteriorly. Elytra combined ca 1.15× as long as wide; brown to black with yellowish lateral margins and apices; each elytron with indistinct pale yellow dot at base; 10 longitudinal rows of larger setiferous punctures alternating with 10 rows (interstriae) of sparser and fainter punctures; all rows less conspicuous in darker specimens. Black parasutural space forming a flat and shining stripe extended over parasutural furrow. Epipleura and pseudoepipleura oblique, nearly vertical. Metaventrite setiferous with three postero-median, posteriorly converging sulci. Legs. Fore coxae and trochanters granulate, pubescent; fore femora setiferous on basal third, smooth distally, with tibial groove; fore tibiae smooth, each with stiff setae and two apical spurs. Middle femora with tibial grooves; ventral side of each middle tibia with three longitudinal rows of stiff setae and sulcus between two longitudinal ridges. Hind trochanters smooth and shining; hind femora smooth, with setiferous punctures and tibial grooves; hind tibiae curved, ventral side of each tibia with three longitudinal rows of stiff setae and longitudinal sulcus between two ridges. Abdomen. Ventrite 1 granulated, ventrites 2–4 smooth, ventrites 5–6 granulated with short setae. Aedeagus (Fig. 3): Total length 0.37–0.49 mm. Parameres nearly as long as phallobase; medial margin of parameres subparallel, apices slightly diverging in dorsal view. Median lobe wide, tongue-shaped, slightly constricted at midlength, barely rounded apically, nearly as long as parameres. <b>Differential diagnosis.</b> <i>Laccobius hanka</i> sp. nov. belongs to a group of <i>Glyptolaccobius</i> species with curved hind tibiae and pubescent elytra with longitudinal rows of punctures (together with <i>L. silvester</i>, <i>L. shorti</i> and <i>L. sipeki</i> sp. nov.). It differs from all three mentioned species by the pale spot on the elytral base and the wide median lobe. <b>Etymology.</b> The new species is named after Hanka, a diminutive of the first name of Hana Šípková (her maiden name was H. Podskalská), who collected part of the type series of this species. To be treated as a noun in apposition. <b>Bionomics.</b> All specimens were collected at a seepage site at a roadside below a steep slope covered with moss and a mat of <i>Nostoc</i> (Fig. 13). The locality is situated at the margin of the Assam Valley where the first highlands of the Himalaya Range begin to rise. <b>Distribution.</b> India, lowland border regions of Arunachal Pradesh. So far known only from the type locality.
description: Published as part of <i>Gentili, Elio &amp; Fikaček, Martin, 2009, Taxonomic notes on Laccobius, subgenus Glyptolaccobius, with new records and description of four new species (Coleoptera: Hydrophilidae), pp. 607-623 in Acta Entomologica Musei Nationalis Pragae 49 (2)</i> on pages 612-614, DOI: 10.5281/zenodo.5321314