Nemoura nankinensis Wu, 1926

Chen, Zhi-Teng & Du, Yu-Zhou, 2017, A new species of Nemoura (Plecoptera: Nemouridae) from Jiangsu Province, China, with new illustrations for Nemoura nankinensis Wu, Zootaxa 4254 (2), pp. 294-300 : 298-299

Nemoura nankinensis Wu, 1926

Figs. 11–19 .

Nemoura nankinensis Wu, 1926 . J. Sci. Arts. 5: 332. Type locality: Jiangsu Province, Nanking; Wu, 1938. Plecopt. Sin., 182; Illies , 1966. Das Tierreich , 82: 208.

Type material (lost). Holotype, male, China: Jiangsu Province, Nanking, Ning-Kuo Temple , 4 April, 1923, leg. Chenfu Wu.

Material examined. 18 males and 10 females, Jiangsu Province, Nanjing, Mt. Zijinshan , 18–19 February, 2006, leg. Zhi-Jie Wang ; 1 male and 1 female, same locality, 2 February, 2016, leg. Zhi-Teng Chen, Zhi-Jie Wang ; 41 males and 21 females, same locality, 17 February, 2016, leg. Zhi-Teng Chen, Qin-Bo Huo, Qiu-Yue Huo ; 19 males and 18 females, same locality, 3 March, 2016, leg. Zhi-Teng Chen, Qin-Bo Huo.

Diagnosis. Male. Tergum 9 with posteromedial indentation. Cercus upcurved, inner part membranous with a rounded apex, outer margin sclerotized with an incurved, large apical spine. Epiproct oval, dorsal sclerite with a pair of lateral sclerites and medially crossed grooves; ventral sclerite with a row of spines; lateral knob not obvious. Paraproct bilobed, inner lobe small and strongly sclerotized; outer lobe broad basally, inner and outer margin each with a spine, apex finger-shaped and slightly curved ( Figs. 11–14 , 17 ).

Female. Sterna 2–4 each with a pair of small sclerites anteriorly. Sterna 4–6 each with a pair of medial spots. Sternum 6 with a sclerotized patch posteromedially. Pregenital plate on sternum 7 rounded and strongly sclerotized, reaching anterior margin of sternum 9 ( Figs. 15–16 , 18 ).

Distribution. China (Jiangsu Province).

Remarks. The holotype and paratypes of N. nankinensis were originally deposited in the Yenching University insect collection but lost during warfare ( Wu 1962). The supplementary illustrations for N. nankinensis were taken from a several mating pairs ( Fig. 19 ). These specimens were collected from a small stream on the 447 m high Purple Mountain or Mount Zijin Shan on the eastern side of Nanjing in Jiangsu Province, China, where the ‘Ning- Kuo Temple’ is located. Two additional stonefly species are also known from Mount Zijin Shan, Amphinemura sinensis ( Wu, 1926) and Capnia s.l. zijinshana Du & Chen, 2016.

Figures

FIGURE 19. Nemoura nankinensis Wu. Mating pair.

FIGURES 11 – 16. Nemoura nankinensis Wu. 11. Male head and pronotum, dorsal view; 12. Male terminalia, dorsal view; 13. Male terminalia, lateral view; 14. Male terminalia, ventral view; 15. Female head and pronotum, dorsal view; 16. Female terminalia, ventral view; 17. Male habitus, dorsal view; 18. Female habitus, dorsal view. 19. Mating pair.

FIGURES 17 – 18. Nemoura nankinensis Wu. 17. Male habitus, dorsal view; 18. Female habitus, dorsal view.