Claassenia magna Wu, 1948

MO, RAORAO, WANG, GUOQUAN, YANG, DING, LI, WEIHAI & MURÁNYI, DÁVID, 2022, Review and contribution to the stoneflies (Insecta: Plecoptera) of Guangxi Zhuang Autonomous Region, China, with new species and new records from South China, Zootaxa 5176 (1), pp. 1-80 : 19-25

Claassenia magna Wu, 1948

( Figs. 16–20 )

Claassenia magna Wu, 1948: 146 ; Illies, 1966: 328; Du, Sivec & He, 1999: 60; Du, 1999: 304; Yang & Li, 2018: 24.

Supplementary description of male ( Figs. 16 , 17a–17b , 18–20 ). Head pale, with a pair of short brown or dark brown bands linking anterior and posterior ocelli. Pronotum rectangular; anterior corners acute, posterior corners rounded; margins and median band brown. Femora mostly pale, tibiae dark brown, tarsi brown. Wings light brown, veins dark brown. Sternum 9 moderately elongated and slightly sclerotized except an inverted, subtrapezoidal sclerotized patch linking to hammer, and a heavily sclerotized posteromedial band; hammer is large, bald and rounded in ventral view, Tergum 8 bears a small posteromedial, rounded patch of sensilla basiconica. Tergum 9 posteromedially with a big oval patch of sensilla basiconica. Hemitergal processes of tergum 10 sclerotized, basally curved inward, claviform, apex blunt and covered with tiny spines. Fully everted aedeagus ( Figs. 16b–d , 17a–17b , 19c, 19d , 20 ) tubular, membranous, with a blunt tip; apical half of dorsal surface covered with pale, short hairs.

Female ( Figs. 17c–17e ,). Head pattern similar to male, but further body pattern is distinctly different. Pronotum dark brown, legs dark brown with apex of femora light brown. Wing dark brown, veins dark. Sternum 8 lightly sclerotized; posteromedial area slightly produced into an obscure subgenital plate. The female was associated through COI sequencing.

Eggs. Available females were void of eggs.

Material examined. 1 male ( HIST), China: Guangxi, Nanning City, Wuming County, Liangjiang Town , Neichao Village , 23°29'32" N, 108°21'29" E, 230 m, 2017.VII.13 , light trap, Mo RR, Lai Y; 1 male ( COI NO. PC67) ( HIST), same location as above, 2018. V.5, light trap, Wang GQ; 1 male ( COI NO. PC66) ( HIST), Guangxi, Laibin City, Jinxiu Yao Autonomous County, Dayaoshan National Natural Reserve , Yinshan Park, 24°10'07" N, 110°14'38" E, 1150 m, 2016. V.21, Liu XY; 2 males ( HIST), Guangxi, Laibin City, Jinxiu Yao Autonomous County, Fenzhan Village , 24°7'31" N, 110°12'14" E, 810 m, 2020. VI.24, light trap, Mo RR, Lai Y et al.; 1 male ( COI NO. C22) ( HIST), same location and collectors as above, 2020. VI.24; 11 males and 1 female ( COI NO. C21) ( HIST), same location and collectors as above, 2020. VI.23; 1 male ( COI NO. C23) ( HIST), Hunan, Chenzhou City, Yizhang County, Mangshan National Forest Park, 643–1769 m, 24°58'48" N, 112°54'36" E, 2020.IX.7 , Mo RR; 1 male ( COI NO. C24) ( HIST), Hunan, Shaoyang City, Xining County, Shunhuangshan , Shunfei Hotel , 760–780 m, 26°24'1" N, 111°0'11" E, 2020.VIII.26 , light trap, Deng M.

Distribution. China (Fujian, Guangxi and Hunan).

Remarks. The above males collected from Guangxi and Hunan match the original description and redescription of Claassenia magna Wu, 1948 (Du 1999; Wu 1948). The simple aedeagus, and the female of this species are described and illustrated for the first time. The female was associated with the male by molecular studies. Two males of this species from Nanling Mountains are new province records for Hunan.

Figures

FIGURE 16. Claassenia magna Wu, 1948 (male from Fenzhan Village). a. Head and pronotum, dorsal view. b. Terminalia and aedeagus, dorsal view. c. Terminalia and aedeagus, oblique dorsal view. d. Terminalia and aedeagus, cercal view. e. Adult habitus, dorsal view.

FIGURE 17. Claassenia magna Wu, 1948 (a–b: male and c–e: female (C21) from Fenzhan Village). a. Terminalia and aedeagus, lateral view. b. Terminalia and aedeagus, ventral view. c. Head and pronotum, dorsal view. d. Terminalia, ventral view. e. Adult habitus, dorsal view.

FIGURE 18. Claassenia magna Wu, 1948 (male (PC66) from Yinshan Park). a. Head, dorsal view. b. Pronotum, dorsal view. c. Terminalia, dorsal view. d. Terminalia, lateral view. e. Apical part of hemitergal processes, dorsal view. f. Sternum 9, ventral view.

FIGURE 19. Claassenia magna Wu, 1948 (male from Neichao Village collected at 2017.VII.13, light trap). a. Head, dorsal view. b. Pronotum, dorsal view. c. Terminalia and aedeagus, dorsal view. d. Aedeagus, dorsal view.

FIGURE 20. Claassenia magna Wu, 1948 (male from Neichao Village collected at 2017.VII.13, light trap). a. Terminalia and aedeagus, lateral view. b. Terminalia and aedeagus, ventral view.