Isoperla yangi Wu, 1935

Chen, Zhi-Teng, Song, Liang-Dong & Feng, Wen-Tao, 2019, A new species of Isoperla (Plecoptera: Perlodidae) from the Qinling Mountains of northwestern China and notes on the Chinese species of the genus, Zootaxa 4651 (2), pp. 379-391 : 386

Isoperla yangi Wu, 1935

Isoperla yangi Wu, 1935b . Bull. Pek. Soc. Nat. Hist., 9(3): 227; Wu, 1935a. Catalogus Insectorum Sinensium, 1: 301; Wu, 1938b. Plecopterorum Sinensium, a monograph of the stoneflies of China (Order Plecoptera ): 46; Claassen, 1940. Mem. Cornell agric. Exp. Sta., 232: 207; Illies, 1966. Das Tierreich, 82: 424; Yang & Li, 2018. Species Catalogue of China. Vol. 2. Animals, Insecta (III), Plecoptera : 49.

Type information. Holotype male, China: Jiangxi Province, Mt. Madangshan. 1930.IV.17.

Remarks. Both male and female are known. The male of this species has posteriorly extended and sclerotized tergum 10, hooked paraprocts and a well-developed, recessed, deeply pedunculate vesicle. The female has a large subgenital plate with a shallow apical notch, covering most part of sternum 9 ( Figs. 1 N–P; see figs. 28–30 in Wu 1938b). Color pattern: head brown; pronotum brown, slightly rugose; legs uniformly brown; ventral surface of body brown ( Wu 1938b).

Figures

FIGURE 1. Drawings of older Isoperla species from China tracing original literature. A. I. bimaculata, female head and pronotum, dorsal view; B. I. bimaculata, female terminalia, ventral view; C. I. curvispina, male terminalia, dorsal view; D. I. curvispina, male terminalia, ventral view; E. I. curvispina, female terminalia, ventral view; F. I. fengi, female terminalia, ventral view; G. I. nanchana, male terminalia, ventral view; H. I. neimongolica, male head and pronotum; I. I. neimongolica, male terminalia, dorsal view; J. I. neimongolica, male terminalia, ventral view; K. I. ordosi, male terminalia, dorsal view; L. I. ordosi, male terminalia, ventral view; M. I. sowerbyi, female terminalia, ventral view; N. I. yangi, male terminalia, dorsal view; O. I. yangi, male terminalia, ventral view; P. I. yangi, female terminalia, ventral view.