Research Article |
Corresponding author: Guoquan Wang ( wangguoquan0@163.com ) Corresponding author: Weihai Li ( lwh7969@163.com ) Academic editor: Sven Bradler
© 2021 Raorao Mo, Guoquan Wang, Weihai Li, Dávid Murányi.
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:
Mo R, Wang G, Li W, Murányi D (2021) Two new species and one new record of Neoperla (Plecoptera, Perlidae) from Guangxi Zhuang Autonomous Region, China. ZooKeys 1056: 191-206. https://doi.org/10.3897/zookeys.1056.61565
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Three species of the Neoperla montivaga group are described from Guangxi Zhuang Autonomous Region of southern China, including two new species, N. falcatata sp. nov. and N. shangsiensis sp. nov., and a new record for Guangxi: N. bilineata Wu & Claassen, 1934. Illustrations and color images are provided for the three species mentioned above, and the new species is compared with related congeners in the group. Notes on the distribution of the Neoperla species known from Guangxi are also given.
Neoperla montivaga group, Perlinae, southern China, Stoneflies, taxonomy
Neoperla Needham, 1905, of the subfamily Perlinae (Plecoptera, Perlidae), is one of the most species-rich and widely distributed stonefly genera, with at least 271 species worldwide (
Specimens were collected using an aerial net or by light traps with white lamps and stored in 75% ethanol. The holotype of the new species and other studied specimens are deposited in the Insect Collection of the Henan Institute of Science and Technology (HIST), Xinxiang, China and in the National Museum Prague (
Neoperla bilineata:
1 male (HIST), 1 male (
Males of this species are characterized by tergum 7 with an anteromedian pair of nipple-shaped processes, the straight aedeagal tube and the spinulose aedeagal sac with a small dorsoapical butterfly-shaped sclerite.
China (Guangxi, Sichuan).
The Jiangdi Village is located in the northeast of the Multinational Autonomous County of Longsheng, Guangxi, and is bordered by the Xing’an, Lingchuan and Ziyuan counties of Guangxi and by Chengbu County of Hunan Province. The Sangjiang River system flows through the village. In addition, both Jiangdi Village and Huaping National Nature Reserve of the same county belong to the Nanling area. The village is more than 600 km from Yibin City of Sichuan Province, where the type material of this species were collected. The adults of the species fly in spring and occur at low altitude. At the same locality, accompanying stoneflies were Neoperla delphina Li, Mo & Wang, 2020 and one unidentified female Togoperla sp.
Neoperla bilineata Wu & Claassen, 1934 was originally described from the Sichuan Province of southwest China, without full eversion of the aedeagus.
Holotype: male (
This species is characterized by a median dark brown oval area on the head. The aedeagus is sickle-shaped, mostly covered with mixed armatures of spines and spinules. Females of this species have a small truncate tab-like subgenital plate of sternum 8.
Adult habitus (Figs
Neoperla falcatata sp. nov. (male) A head and pronotum, dorsal view B terminalia after being cleared, dorsal view C apical half of aedeagal sac, dorsal view D terminalia after being cleared, lateral view E terminalia after being cleared, oblique lateral view F aedeagus, lateral view. Scale bars: 0.5 mm (A–C); 0.2 mm (D–F).
Male
(Figs
Female
(Figs
The name refers to the sickle-shaped aedeagus. The Latin “falcatus” means sickle-shaped.
China (Guangxi).
Shiwandashan National Forest Park is located in the southwest of Shangsi County of Fangchenggang City, Guangxi, and it belongs to the Shiwanda Mountains. The adults of the new species fly in spring and occur at low altitude. Other accompanying stoneflies were: Amphinemura hamiornata Li & Yang, 2008, Neoperla shangsiensis sp. nov., N. yentu Cao & Bae, 2007, N. yao Stark, 1987, an unidentified Neoperla sp. found only as a female, Rhopalopsole cestroidea Li, Murányi & Gamboa, 2017, and Togoperla perpicta Klapálek, 1921.
The new species shares a similar shape of the aedeagus with Neoperla nigromarginata Li & Zhang, 2014 from Henan Province, central China. However, the new species can be easily separated from the latter by the markings on the head and pronotum (see
Finally, the female subgenital plates of the two species have different details. In N. falcatata, the posterior margin of the subgenital plate is truncate, while in N. nigromarginata the posterior margin of the subgenital plate has a slightly emarginate tip.
Holotype: male (
This species is characterized by head with a median dark-brown rectangular marking covering the posterior ocelli, with a pair of posterior wing-like extensions. In the male, the aedeagus is characterized by a short ventral spinulose lobe, a pair of small dorsal spinulose lobes, and a low ventroapical lobe fully armed with spines.
Adult habitus (Fig.
Male
(Figs
Neoperla shangsiensis sp. nov. (male) A terminalia after being cleared, lateral view B terminalia after being cleared, oblique lateral view C tip of aedeagal sac, dorsal view D tip of aedeagal sac, ventral view E aedeagus, oblique lateral view F aedeagus, lateral view. Scale bars: 0.2 mm (A, B); 0.1 mm (C–F).
Female. Unknown.
The species name refers to the Shangsi County, where the type locality is located.
China (Guangxi).
See ecology of Neoperla falcatata sp. nov.
The new species belongs to the Neoperla oculata species complex of the montivaga species group as defined by
Guangxi Zhuang Autonomous Region is located in southern China. The Region borders Guangdong Province to the east, Beibu Gulf to the south and Hainan across the sea, Yunnan Province to the west, Hunan Province to the northeast, and Guizhou Province to the northwest. The Region also borders Vietnam to the southwest. To date, 24 species of Neoperla known from Guangxi had been studied, mainly by
We are indebted to Dr. M. Fikáček, Dr. J. Hájek and Dr. J. Růžička for collecting the specimens. The research was partially supported by the National Natural Science Foundation of China (No. 31970402) and the GDAS Special Project of the Science and Technology Development (No. 2020GDASYL-20200102021).