Corresponding author: Jing Li (
Academic editor: Enrico Ruzzier
The genus
The genus
During our examination of specimens from south-western China, a species of new national record,
The specimens were softened in hot water for 12 hours. After that, the abdominal segments and genitalia were detached from the body. Male and female genitalia were immersed in boiling sodium hydroxide (NaOH) solution (5%) for five minutes and then cleaned with distilled water. Morphological characters were observed and illustrated with a Nikon SMZ800N stereomicroscope and modified with Adobe Photoshop CS6.0. Habitus photographs were taken with an Olympus E-M5Ⅱ camera. The species has sexual dimorphism. Males can be distinguished by the inner odontoid processes of the pro- and mesofemora. Two males and two females were dissected. Morphological terminology for external structures follows Lawrence (
We examined the holotype specimen deposited in the Natural History Museum (NHML) and compared the specimens from China with the holotype in morphological characteristics.
Parts of the following characters combined the features from
Body oval, dorsally convex in lateral view. Head with a pair of stridulatory files on occipital region, both sides with ridge processes, anterior part of frons shallowly impressed at each side. Clypeus with anterior border feebly emarginate. Antennae slender, antennomere Ⅱ short, antennomere Ⅲ more than twice as long as wide, antennomeres Ⅵ-Ⅷ slender, antennal club composed of last three antennomeres loosely articulated. Eyes small, finely faceted, interocular distance wide. Terminal maxillary palpomere more than three times as wide as long. Ligula narrow, the middle of front margin slightly emarginated. Labial palpus short, with the terminal palpomere semi-circular. Mentum slightly longer than width. Anterior margin of pronotum with translucent membranous areas, lateral and basal margins with narrow and complete marginal border. Well-marked punctations on anterior and posterior angles. Prosternum flat, narrowed between procoxal cavities, then broadening behind the coxa. Metaventrite process narrow. All the coxal lines absent.
Compared to female, male has longer antennae, stronger legs and wider tarsi. In some species, inner edge of the male femur has two small rows of nodules or odontoid processes.
Body elongate-oval, convex dorsally, smooth and shining. General colour orange-yellow, the front edge of clypeus, legs and antenna black (Fig.
Pronotum (Fig.
Prosternum (Fig.
Legs (Fig.
Male genitalia (Fig.
Body length: 4.5-6.0 mm; width: 2.0-4.0 mm.
China (Tibet, Yunnan); India (Assam).
1 | Elytron bicolour |
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– | Elytron unicolour | 2 |
2 | Antennae uniform black |
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– | Antennae biocolour | 3 |
3 | Metaventrite strongly and sparsely punctate |
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– | Metaventrite finely and closely punctate |
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We are grateful to Liang Tang and Xiujuan Yang (Hebei University) for their help with specimen collections. This research was supported by the National Natural Science Foundation of China (No.31750002), Foreign Young Talents Project (No. QN2021003001) and Special Project of Technological Innovation for Rural Revitalization (No.22326507D).
Huixin Xu is mainly responsible for the description of morphological characteristics and writing of this article. Jiaxin Pang is responsible for specimen pose, photographs and line drawings. Jing Li and Zhiqiang Cheng are responsible for the revision of the article.
Morphological characters of