Neoperla bilineata Wu & Claassen, 1934

Mo, Raorao, Wang, Guoquan, Li, Weihai & Muranyi, David, 2021, Two new species and one new record of Neoperla (Plecoptera, Perlidae) from Guangxi Zhuang Autonomous Region, China, ZooKeys 1056, pp. 191-206 : 191

Neoperla bilineata Wu & Claassen, 1934

Figs 1 , 2

Neoperla bilineata : Wu and Claassen 1934: 120; Wu 1938: 107; Claassen 1940: 158; Wu 1948: 75; Illies 1966: 268; Zwick 1973: 258; Du et al. 1999: 62; Li et al. 2017: 199; Yang and Li 2018: 39; Mo et al. 2020b: 375.

Material examined.

1 male (HIST), 1 male (NMP), Guangxi Zhuang Autonomous Region , Guilin City , Multinational Autonomous County of Longsheng, Jiangdi Village, terraced fields surrounded with shrubs and bamboo forest, 365m, 25°55.6'N, 110°14.8'E, 12.IV.2013, leg. M. Fikáček, J. Hájek and J. Růžička.

Diagnosis.

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.

Distribution.

China (Guangxi, Sichuan).

Ecology.

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.

Remarks.

Neoperla bilineata Wu & Claassen, 1934 was originally described from the Sichuan Province of southwest China, without full eversion of the aedeagus. Li et al. (2017) made a complementary description, including that of the completely everted aedeagus. In the present study, two males of this species from Guangxi agree well with original and complementary illustrations and descriptions of the head pattern, the dorsal aspects of the terminalia and the aedeagus ( Wu and Claassen 1934; Wu 1938; Li et al. 2017). We provide additional illustrations (Figs 1 , 2 ) for aiding the recognition of this species from the Guangxi Zhuang Autonomous Region of southern China.

Figures

Figure 1. Neoperla bilineata Wu & Claassen, 1934 (male) A adult habitus, dorsal view B head and pronotum, dorsal view C terminalia, dorsal view. Scale bars: 1.0 mm.

Figure 2. Neoperla bilineata Wu & Claassen, 1934 (male) A terminalia after being cleared, dorsal view B terminalia after being cleared, lateral view C aedeagus, lateral view D aedeagus, dorsal view E aedeagus, ventral view. Scale bars: 1.0 mm.