Isoperla fengi Wu & Claassen, 1934

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 : 382

Isoperla fengi Wu & Claassen, 1934

Isoperla fengi Wu & Claassen, 1934 . Bull. Pek. Soc. Nat. Hist., 9(2): 114; Wu, 1935a. Catalogus Insectorum Sinensium, 1: 301; Wu, 1938b. Plecopterorum Sinensium, a monograph of the stoneflies of China (Order Plecoptera ): 42; Claassen, 1940. Mem. Cornell agric. Exp. Sta., 232: 200; Illies, 1966. Das Tierreich, 82: 402; Yang & Li, 2018. Species Catalogue of China. Vol. 2. Animals, Insecta (III), Plecoptera : 49.

Type information. Holotype female, China: Jilin Province, Mt. Xiaobeishan. 1929.VI.19.

Remarks. The holotype female is only known specimen of this species. Apparently, the female is characterized by the large, bilobed subgenital plate covering sternum 9, and by the paraprocts long triangular ( Fig. 1F ; see fig. 4 in Wu & Claassen 1934). Color pattern: head yellowish brown with a rounded yellow spot in ocellar area and with yellow areas inside the compound eyes; pronotum brown, medially with a broad, yellow, longitudinal stripe, lateral areas with dark brown rugosities; legs brown; ventral surface of body brown ( Wu & Claassen, 1934). Although only the female description is available, the uncommon shape of subgenital plate appears diagnostic. An associated male is required to complete the description of this species

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.