Research Article |
Corresponding author: Ze-Kan Lü ( 1120885275@qq.com ) Academic editor: Volker Assing
© 2014 Ze-Kan Lü, Li-Zhen Li.
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:
Lü Z, Li L (2014) Two new species of Lobrathium Mulsant & Rey (Coleoptera, Staphylinidae, Paederinae) from China. ZooKeys 447: 125-131. https://doi.org/10.3897/zookeys.447.8217
|
Lobrathium jianqingi sp. n. (Guangxi: Shiwanda Shan) and L. atanggei sp. n. (Yunnan: Nabanhe) from southwest China are described and illustrated.
Coleoptera , Staphylinidae , Lobrathium , new species, China
In a recent checklist provided by
During two recent field trips we collected some Lobrathium specimens. Among them, two new species are recognized.
The material treated in this study is deposited in the Insect Collection of Shanghai Normal University, Shanghai, China (SNUC).
Type labels are cited in their original spelling. A slash (/) is used to separate different labels.
The specimens were killed with ethyl acetate and then dried. Materials were stored in 75% ethanol; genitalia and small parts were embedded in Euparal on plastic slides that were attached to the same pin with the specimens.
Morphological studies were carried out using an Olympus SZX 16 stereoscope. A digital camera Canon EOS 7D with MP-E 65 mm Macro Photo Lens was used for the habitus photos. An Olympus CX31 microscope and a Canon G9 digital camera were used for the photos of small structures.
The measurements of various body parts are abbreviated as follows: BL – length of the body from the apical margin of the labrum to the abdominal apex; HL – length of the head from the anterior margin of the frons to the posterior constriction; HW – maximum width of the head; PL – length of the pronotum along midline; PW – maximum width of the pronotum; EL – length at the suture from the apex of the scutellum to the posterior margin of the elytra; EW – maximum width of the elytra; AL – length of the aedeagus from the apex of the ventral process to the base of the aedeagal capsule.
Holotype: ♂, labelled ‘China: Guangxi Prov., Shangsi County, Shiwanda Shan N. R., 21°54'16"N, 107°54'13"E, 300–500 m, 25.IV.2011, Zhu, Peng & Zhai leg. / HOLOTYPE [red], Lobrathium jianqingi sp. n., Lü & Li det. 2014, SNUC’. Paratype, 1 ♀: same data as holotype.
Body length 6.84–7.34 mm, length of forebody 3.73–3.78 mm. Habitus as in Fig.
Head weakly transverse (HW/HL 1.23–1.28); posterior angles broadly rounded, weakly marked; punctation dense and coarse, sparser in median dorsal portion; interstices without microsculpture. Eyes large, approximately half as long as distance from posterior margin of eye to neck in dorsal view. Antenna slender, 2.22 mm long.
Pronotum 1.13–1.24 times as long as broad and 0.90–0.97 times as wide as head, lateral margins weakly convex in dorsal view; punctation similar to that of head, midline with broad and complete impunctate band; interstices without microsculpture.
Elytra distinctly broader and longer than pronotum (EW/PW 1.33–1.39; EL/PL 1.08–1.17), humeral angles marked; punctation dense and coarse; interstices without microsculpture and glossy. Hind wings fully developed.
Abdomen narrower than elytra; punctation very fine and dense, dorsal surface nearly matt; posterior margin of tergite VII with palisade fringe.
Male: Sternites III–VI unmodified; sternite VII (Fig.
Female: Posterior margin of tergite VIII (Fig.
The type locality is situated in the Shiwanda Shan Natural Reserve, to the south of Shangsi, southern Guangxi. The specimens were found on the bank of a stream at altitudes of 300–500 m.
The species is named after Jian-Qing Zhu, one of collectors of the type specimens.
In external characters (moderate size, black body, elytra with large subcircular yellow spot), the chaetotaxy of the male sternites VII and VIII and the morphology of the aedeagus (especially long ventral process), L. jianqingi is most similar to L. anatinum Li & Li, 2013 from Guangxi. The new species is distinguished from L. anatinum by the more deeply concave posterior margin of the male sternite VII, the deeper posterior excision of the oblong male sternite VIII, and by the shape of the ventral process of the aedeagus in lateral view. For illustrations of L. anatinum see
Holotype: ♂, labelled ‘China: Yunnan Prov., Xishuangbanna, Nabanhe N. R., alt. 700 m, 22°10'00"N, 100°39'38"E, 1.VII.2004, Liang Tang leg. / HOLOTYPE [red], Lobrathium atanggei sp. n., Lü & Li det. 2014, SNUC’.
Body length 6.56 mm; length of forebody 3.11 mm. Habitus as in Fig.
Head almost as broad as long (HW/HL 1.05), posterior angles broadly rounded, weakly marked; punctation dense and coarse, sparser in median dorsal portion; interstices without microsculpture. Eyes large, more than half as long as distance from posterior margin of eye to neck in dorsal view. Antenna slender, 2.0 mm long.
Pronotum 1.24 times as long as broad and 0.94 times as wide as head, lateral margins weakly convex in dorsal view; punctation dense and coarser than that of head, midline with broad and complete impunctate band; interstices without microsculpture.
Elytra distinctly broader and longer than pronotum (EW/PW 1.42; EL/PL 1.55), humeral angles marked; punctation dense and coarse; interstices without microsculpture and glossy. Hind wings fully developed.
Abdomen narrower than elytra; punctation very fine and dense, dorsal surface matt; posterior margin of tergite VII with palisade fringe.
Male: Sternites III–VI unmodified; sternite VII (Fig.
Female: unknown.
The type locality is situated in the Nabanhe Natural Reserve, to the northwest of Xishuangbanna, southwestern Yunnan. The holotype was found on the bank of a stream at an altitude of 700 m.
The species is named after Liang Tang (nickname “Atangge”), who collected the holotype.
In external characters (black body, weakly transverse head, slender pronotum, elytra with small subcircular spot), as well as the shape and chaetotaxy of the male sternites VII and VIII, L. atanggei is similar to L. ablectum Assing, 2012 from Hubei. The new species is readily distinguished from L. ablectum by the somewhat smaller size, the pronounced blue hue of the body and a stout ventral process of the aedeagus. Regarding the morphology of the aedeagus (robust and with short ventral process), however, the new species is most similar to L. quadrum Li, Solodovinikov & Zhou, 2013 from Sichuan. It is distinguished from L. quadrum by the pronounced blue hue of the body; the yellowish spot on elytra, reaching neither suture, nor lateral or posterior margins; the modifications of the male sternites VII–VIII (sternite VII with pronounced median impression posteriorly, sternite VIII with numerous modified, very short and stout black setae; deep posterior excision). For illustrations of L. ablectum and L. quadrum see
We thank Volker Assing (Hannover, Germany) for reviewing this manuscript. We thank Wen-Rong Li (Shanghai, China) and Zhong Peng (Shanghai, China) for helpful suggestions during the study. The study is supported by the National Natural Science Foundation of China (No. 31101659, No. 31201734) and Shanghai Normal University (DZL125).