Corresponding author: Liang Tang (
Academic editor: V. Assing
A new
Tang L, Tu Y-Y, Li L-Z (2016) Notes on the genus
Recently, we examined some specimens of the genus, among them a new species and a new province record.
Specimens were mainly collected by hand from decayed wood and fungi in broad-leaved forests and killed with ethyl acetate. For examination of the male genitalia, the last two abdominal segments were detached from the body after softening the specimens in hot water. The aedeagi were mounted in Euparal (Chroma Gesellschaft Schmidt, Koengen, Germany) on plastic slides. Photos of the aedeagi were taken with a Canon G9 camera attached to an Olympus SZX 16 stereoscope; habitus photos were taken with a Canon macro photo lens MP-E 65 mm attached to a Canon EOS 7D camera and stacked with Zerene Stacker (
The type specimens treated in this study are deposited in the following public and private collections:
Department of Biology, Shanghai Normal
Body length: 5.3–5.9 mm. Pronotum width: 2.0–2.1 mm.
Head black, except for the reddish mouthparts. Inner basal parts of prohypomera, legs including coxal cavity and mesosternum blackish. Other parts reddish.
Frons at narrowest point 0.42–0.44 mm wide. Head coarsely and very densely punctate, punctation coarse on vertex and fine near eyes. Intervals between punctures distinctly smaller than diameter of punctures. Between eyes with a pair of impunctate patches. Labium smooth. Gular striae impressed, groove-like basally.
Pronotum with antebasal puncture row usually interrupted at middle (rarely uninterrupted), impressed laterally. Discal punctures fine and sparse.
Elytra with shallow apical impression and indistinct humeral protuberance; disc with four discal puncture rows consisting of rather coarse punctures anteriorly gradually becoming finer posteriad. All rows start at about basal 2/11 of elytron and end blurrily where puncture rows mix with apical disc punctures. Punctation fine between discal series of punctures and coarse in apical impressions. Mesoventral process with raised, ridge-like edges, and impressed in middle.
Metaventrite finely and sparsely punctate, lacking microsculpture, with medio-apical impression shallow, narrowed anteriorly, and carinate laterally.
Punctation of abdominal sternites very fine and very sparse. Micropunctures absent.
Male sexual characters. Segments 1 to 3 of protarsi slightly widened with dense setae on ventral side. Aedeagus (Figs
China (Yunnan).
This new species is similar to the variety of
Adult habitus of
This species is named in honor of Mr. Xiao-Yu Zhu who collected some specimens of the new species.
This species was found gathering on an unknown fungus on a huge rotten log across stream, and was observed to become active when night fell (Figs
This species was previously known from Yunnan and Sichuan. The above male represents the first record from Gansu.
1 | Pronotum black |
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– | Pronotum and elytra reddish, sometimes with black spots or fasciae |
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2 | Elytra without puncture rows; abdomen reddish |
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– | Elytra with four discal puncture rows; abdomen black |
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3 | Pronotum with antebasal puncture row impressed laterally; elytra with distinct apical impressions |
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– | Pronotum with antebasal puncture row not impressed laterally; elytra without impressions |
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4 | Elytra reddish with black spots or fasciae |
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– | Elytra entirely reddish |
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5 | Elytra each with two black transverse fasciae, without discal puncture rows |
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– | Elytra each with one apical black spot, with four discal puncture rows |
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6 | Tempora without punctures; pronotum with a pair of black basal spots situated between antebasal puncture row and basal edge |
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– | Tempora densely punctate; pronotum with a pair of black median spots anterior to antebasal puncture row |
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We would like to express our sincere gratitude to Dr. Ivan Löbl (Switzerland) for his guidance, to Mr. Ryo Ogawa (Japan) and Dr. Volker Assing (Germany) for greatly improving the manuscript, to Mr. Xiao-Yu Zhu, Mr. Jian-Qing Zhu and Mr. Wen-Xuan Bi (China) for collecting specimens and sharing biological information, to Mr. Chen Chang-Chin (China) for donating specimens to us, to Dr. Masahiro Sakai, Mr. Ryo Ogawa and Mr. Yuji Katayama (Japan) for the loan of material for comparison, and to Dr. Martin Fikáček (Czech Republic) for the loan of additional material.