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).