Research Article |
Corresponding author: Zi-Wei Yin ( pselaphinae@gmail.com ) Academic editor: Jan Klimaszewski
© 2019 Qing-Hao Zhao, Wang Xu, Zi-Wei Yin.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Zhao Q-H, Xu W, Yin Z-W (2019) A new species of Linan Hlaváč (Coleoptera, Staphylinidae, Pselaphinae) from Shenzhen, China. ZooKeys 859: 63-68. https://doi.org/10.3897/zookeys.859.35465
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A new Chinese species of the genus Linan Hlaváč, 2003, L. qiniangmontis sp. nov., is described based on two male and three female specimens from sifted leaf litter samples at Qiniang Mountain, Shenzhen City, Guangdong. The species can be readily recognized and separated from all congeners based on the forms of the male antennae, the metaventral processes, and the aedeagus.
Ant-loving beetles, southern China, taxonomy, Tyrini
The Oriental genus Linan Hlaváč, 2003 belonging to the ‘Pselaphodes complex’ of genera (
The material used in this paper is housed in the Insect Collection of Shanghai Normal University, Shanghai, China (SNUC). The text of the specimen labels is quoted verbatim, with original Chinese names listed in parentheses.
Dissected parts were preserved in Euparal on plastic slides that were placed on the same pins as the respective specimens. The habitus images were taken using a Canon 5D Mark III camera with a Canon MP-E 65mm f/2.8 1–5X Macro Lens, and a Canon MT-24EX Macro Twin Lite Flash used as the light source. Images of the morphological details were produced using a Canon G9 camera mounted to an Olympus CX31 microscope under transmitted light. Zerene Stacker (version 1.04) was used for image stacking. All images were modified and grouped into plates in Adobe Photoshop CS5 Extended.
The abdominal tergites and sternites are numbered following
Holotype: CHINA: ♂: ‘China: Guangdong, Shenzhen City, Mt. Qiniang (七娘山), 23°32'28.73"N, 114°35'8.46"E, mixed leaf litter, sifted, 45 m, 23.III.2019, Tang, Shuai, Zhao, Zhou & Xia leg.’ (SNUC). Paratypes: CHINA: 1 ♂, 3 ♀♀, same label data as holotype (SNUC).
Body length slightly less than 2.5 mm. Male: antennal club almost simple, with antennomere IX slightly angulate at anteromesal corner; metaventral processes short and narrowing toward apex; protibiae with small denticle at apex; metacoxae with truncate, curved, ventral projection; aedeagus elongate, median lobe asymmetrically narrowed at apex. Female: identifiable only when in association with a male.
Male (Fig.
Male diagnostic features of Linan qiniangmontis sp. nov. A antennal club B pronotum C metaventral process, lateral D protrochanter and profemur E apex of protibia F mesotrochanter and mesofemur G metacoxa, metatrochanter, and metafemur H sternite IX I–K aedeagus, dorsal (I), lateral (J), and ventral (K). Scale bars: 0.3 mm (A, B, D, F, G); 0.2 mm (C, I, J, K); 0.1 mm (H); 0.05 mm (E).
Female. Similar to male in general morphology, with slightly shorter antennae and smaller eyes; antennae and legs simple; lacking metaventral processes. Eyes each composed of approximately 18 facets. Measurements (as of male): Body length 2.33–2.44 mm, length/width of head 0.53–0.55 /0.49–0.51 mm, length of antennae 1.63–1.70 mm, length/width of pronotum 0.50–0.51/0.51 mm, length/width of elytra 0.57/0.89–0.91 mm, length/width of abdomen 0.72–0.81/0.92–0.93 mm.
China: Guangdong.
The new species epithet refers to the type locality of the new species, Qiniang Mountain.
The new species is placed as a member of the L. chinensis group by the almost unmodified antennal clubs in the male. It is most similar to L. hujiayaoi Yin & Li, 2013 and L. mulunensis Zhang, Li & Yin, 2018 (both from Guangxi) in sharing modified male metacoxae. Linan qiniangmontis differs from both known species in the slightly angulate anteromesal corner of antennomere 9 (rounded in L. hujiayaoi and L. mulunensis), a different form of the metaventral processes (processes stouter in L. hujiayaoi and much more elongate in L. mulunensis), the lack of additional projections above the metacoxae (present in L. hujiayaoi and L. mulunensis), and a more elongate aedeagus with a different configuration of the endophallus.
Peter Hlavác (Czech University of Life Sciences Prague, Praha, Czech Republic) and Giorgio Sabella (Geologiche ed Ambientali dell’Università, Catania, Italy) reviewed the draft manuscript and provided helpful comments. The present study was supported by the National Natural Science Foundation of China (No. 31872965), the Shanghai ‘Phosphor’ Science Foundation, China (19QA1406600), the Shanghai Engineering Research Center of Plant Germplasm Resources (No. 17DZ2252700), and Shenzhen Environmental Monitoring Center, Shenzhen, China.