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Jelínek Josef, Hájek Jiří Two New Species of Glischrochilus with Taxonomic Comments, New Records from Asia

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Jelínek Josef, Hájek Jiří Two New Species of Glischrochilus with Taxonomic Comments, New Records from Asia 2018 ACTA ENTOMOLOGICA 58(2): 567-576 MUSEI NATIONALIS PRAGAE doi: 10.2478/aemnp-2018-0048 ISSN 1804-6487 (online) – 0374-1036 (print) www.aemnp.eu RESEARCH PAPER Two new species of Glischrochilus with taxonomic comments, new records from Asia, and a world checklist of the genus (Coleoptera: Nitidulidae) Josef JELÍNEK & Jiří HÁJEK Department of Entomology, National Museum, Cirkusová 1740, CZ-193 00 Praha 9 – Horn í Počernice, Czech Republic; e-mails: jj.nitidula@seznam. cz; [email protected] Accepted: Abstract. Two new species of the genus Glischrochilus Reitter, 1873, subgenus Librodor th 29 November 2018 Reitter, 1884: Glischrochilus (Librodor) pilula sp. nov. (Laos) and Glischrochilus (Librodor) Published online: ruzickai sp. nov. (China: Yunnan, Sichuan; Myanmar) are described, fi gured and compared with 3rd December 2018 other species of the genus. Glischrochilus egregius (Grouvelle, 1895) is formally synonymised with G. egregius cyclops Jelínek, 1975, syn. nov. and G. egregius monticola Jelínek, 1975, syn. nov. – these two forms were established based on different body colouration; however, the study of extensive material revealed that it is variable independently of its geographic origin. The identity of Ips janthinus Reitter, 1877 from Tasmania (previously included in Glischrochilus) is discussed and the species is formally synonymised with Thallis ianthina Erichson, 1842 (Erotylidae). New country records from China, India, Laos, Thailand and Vietnam, or new Chinese provincial records are provided for 14 species. A world checklist of the genus Glischrochilus is appended. Key words. Coleoptera, Nitidulidae, Glischrochilus, taxonomy, new species, new synonymy, new records, China, India, Laos, Myanmar, Thailand, Vietnam, Oriental Region, Palaearctic Region Zoobank: http://zoobank.org/urn:lsid:zoobank.org:pub:B94BD857-951F-4DEE-B4CD-9DA49691D494 © 2018 The Authors. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Licence. Introduction species belong to the subgenus Librodor and are associated Glischrochilus Reitter, 1873 is a genus of the subfamily with temperate and subtropical broadleaved forests, where Cryptarchinae, containing over 40 currently recognized they live on decaying organic substrates like fermenting species occurring mostly in the Holarctic Region, with sap of trees or fruits. several species reaching also the Oriental Region. Asian The area with the highest species diversity of Glischro- species of the genus were revised by JELÍNEK (1975), ad- chilus is the territory of China. Glischrochilus fauna of ditional species from the Old World were (re)described China was poorly known for a long time and still in the fi rst by JELÍNEK (1982, 1999), KIREJTSHUK (1984, 1987), LASOŃ revision of Asian Glischrochilus by JELÍNEK (1975) only (2009), JELÍNEK et al. (2012), LASOŃ & MAZUR (2016), fi ve species of the genus were known from China, mostly and CLAYHILLS et al. (2016). The genus Glischrochilus is based on old collections. In spite of certain progress in the traditionally divided in two well defi ned and generally last decades, leading to 17 species currently known from accepted subgenera, Glischrochilus s. str. and Librodor the territory of China, our knowledge of this fauna is by Reitter, 1884. The (sub)genus Cephalips Arrow, 1937 no means complete. Some species known to occur in the is considered a synonym of Librodor (see below). The Far East of Russia and Korea (KIREJTSHUK 1992, JELÍNEK monobasic subgenus Gymnoparomius Kirejtshuk, 1987 re- & AUDISIO 2007) may be expected in the northeastern mains unknown to us. As it is based mainly on quantitative provinces of China, and also Glischrochilus quadrisigna- characters, its validity remains somewhat doubtful. Most tus (Say, 1835), an invasive species of American origin, Jelinek.indd 567 3.12.2018 13:52:36 568 JELÍNEK & HÁJEK: New species and records of Asian Glischrochilus (Coleoptera: Nitidulidae) widely distributed in the western Palaearctics eastward to NKME Naturkundemuseum Erfurt, Germany (Matthias Hartmann); Kazakhstan (JELÍNEK & AUDISIO 2007) and recently disco- NMPC National Museum, Prague, Czech Republic (Jiří Hájek); OUMNH Oxford University Museum of Natural History, Oxford, U.K. vered also in Japan by KASHIZAKI & HISAMATSU (2011), will (Darren J. Mann); undoubtedly appear in China in the future. RSCW Private collection of Rudolph Schuh, Wiener Neustadt, In the present paper two new species of the subgenus Austria; Librodor are described from China and Myanmar, and SYSU Biological Museum, Sun Yat-sen University, Guangzhou, Laos, respectively. Two subspecies and one species are for- China (Fenglong Jia); mally synonymised. In addition, we provide new country VKCZ Private collection of Vít Kabourek, Zlín, Czech Republic. records, or fi rst Chinese provincial records for 13 species. Finally, an updated checklist of the genus Glischrochilus Taxonomy is appended. Glischrochilus (Librodor) pilula sp. nov. (Figs 1, 3–6) Material and methods Type locality. Laos, Houaphanh province, Phou Pane mountain near Ban Saluei village, ca. 20°15′N, 104°02′E. Examination, dissection and measurements were com- Type material. HOLOTYPE: (NMPC), labelled: ‘NE Laos (Hua Phan pleted with the use of an Olympus SZX7 stereomicroscope prov.) / BAN SALUEI, Phu Phan Mt. / 20°15′N, 104°02′E / 26.IV.- with an ocular micrometer. Body length was measured from 11.V.2001 / 1500-2000 m, J. Bezděk lgt. [p] // HOLOTYPE / GLIS- anterior margin of clypeus to the apex of elytra, body width CHROCHILUS / pilula sp. nov. / Jelínek & Hájek det. 2018 [p, red label]’. as the maximum width of elytra combined. Description. Male holotype. Egg-shaped, strongly convex, Habitus photographs were taken using a Canon EOS glabrous, shining. Black, each elytron with two orange 550D digital camera with an attached Canon MP-E65mm spots: basal one large, nearly oval, occupying most of f/2.8 1–5× macro lens as numerous separate images at dif- basal third of elytron, reaching from scutellum to lateral ferent focal planes and afterwards combined using Helicon margin, embracing black humeral bulge and not reaching Focus 6.3.0 software. Line drawings are based on photo- suture; posterior one subtriangular, gradually narrowed graphs taken using a Canon EOS 1100D digital camera laterad, reaching neither suture nor lateral margin. Tibiae attached to an Olympus SZX12 stereoscopic microscope, dark reddish brown, basal antennomeres and all tarsi rusty, and subsequently treated in Adobe Photoshop CS6. antennae becoming gradually darker distad, antennomeres The following acronyms are used for morphological VII–IX completely black. Body length 4.0 mm, width terms: 2.3 mm (Fig. 1). ANCL length of antennal club; Head slightly narrower than anterior margin of prono- ANCW width of antennal club; tum (ratio WPR3/HEAW = 1.03), temples obtusely roun- ANLE length of antenna; HEAW width of head across eyes; ded. Frons almost fl at, punctures in middle larger than eye- LELY length of elytra from the tip of scutellar shield to the tip of facets and separated by 1.5–2.0 diameters, becoming closer elytra; around eyes as well as fi ner and closer anteriad; interspaces LEPR length of pronotum along median axis; smooth and shining. Antennae slightly longer than width LFE1 length of profemur; of head across eyes (ratio ANLE/HEAW = 1.03), antennal LFE2 length of mesofemur; LFE3 length of metafemur; club occupying one third of antennal length (ratio ANCL/ LTI1 length of protibia; ANLE = 0.31, oblong oval (ratio ANCL/ANCW = 1.93). LTI2 length of mesotibia; Pronotum widest near posterior angles, as wide as LTI3 length of metatibia; elytra, strongly narrowed anteriad (ratio WPR2/WPR3 WELY maximum width of elytra combined; = 1.77). Anterior margin straight, not bordered, anterior WFE1 maximum width of profemur; WFE2 maximum width of mesofemur; angles subrectangular, acutely pointed, prominent. Lateral WFE3 maximum width of metafemur; margins not explanate, broadly arcuate, in basal fourth WPR1 width of pronotum between posterior angles; more strongly curved towards posterior angles; lateral rim WPR2 maximum width of pronotum; becoming broader posteriad. Basal margin not bordered, WPR3 width of pronotum between anterior angles; subtruncate in front of scutellum, besides it twice indis- WTI1 maximum width of protibia; WTI2 maximum width of mesotibia; tinctly concave, running laterocraniad towards posterior WTI3 maximum width of metatibia. angles, those obtuse, not projecting posteriad. Pronotal disc strongly convex, punctures distinctly fi ner than those Exact label data are cited for the type material. Individu- of frons, nearly equal in size to eye facets, separated by al labels are separated by a double slash (//), different rows 1.5–2.0 diameters; interspaces smooth and shining. Scutel- by a single slash (/). Additional comments and/or explana- lar shield semicircular, fi nely diffusely punctate. tory notes are given in square brackets and the following Elytra widest in basal third, as wide as pronotum, feebly abbreviations are used: hw – handwritten, p – printed. narrowed anteriad and distinctly so posteriad, simulta- Material studied is deposited in the following instituti- neously rounded apically, as long as wide (ratio LELY/ onal and private collections: WELY = 1.00). Lateral margins visible simultaneously ALCB Private collection of Andrzej Lasoń, Biaƚystok, Poland; from above in their entirety, not explanate. Sutural lines BMNH The Natural History Museum [former British Museum (Natu- ral History)], London,
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