Cryptoperla Dui, Sp. N., A New Stonefly From South China (Plecoptera: Peltoperlidae) Author Sivec, Ignac text Illiesia 2005 2005-01-25 1 2 8 9 journal article http://doi.org/10.5281/zenodo.4758569 5cee01bf-7fbf-40c9-8fce-c138dfd3585e 1854-0392 4758569 Cryptoperla dui , sp. n. ( Figs. 1-3 ) Types . Holotype ♂ from Sichung Wenchung , 2500- 3000 m , 6. VII. 1983 , Sichuan , China , deposited in the Institute of Zoology, Academia Sinica, Beijing . Paratype : China : Yunnan , Handel-Mazzetti , 1 ♂ (Naturhistorisches Museum, Wien) . Male . Forewing length 11 mm . General color brown without distinctive pattern. Ocelli small, widely spaced, nearer compound eyes than to each other. Posterior margin of tergum 10 projects between cercal bases, somewhat triangular in outline ( Fig. 1 ). Basal cercal segment 5-6 times long as wide and rather densely fringed primarily along apical half of inner margins with long setae; basal segment modified at tip, bearing several small polyp shaped structures which appear as malformed partial segments; each polyp bears a tuft of close set thickened setae set in a short row ( Fig. 3 ). Vesicle more than twice as wide as long ( Fig. 2 ). Female. Unknown. Larva. Unknown. Diagnosis . In Stark (1989) this species will key to couplet 8 where an impasse occurs and the species cannot be satisfactorily assigned to C. bisaeta (Kawai) ( Kawai 1968 ) or C. kali Stark ( Stark 1989 ). The cerci of males of this species is at least superficially similar to that of C. bisaeta , however in that species there is a single long slender polyp which bears a tuft of long thin setae. There is also a general similarity with C. kali but again the cerci have only one modified process and this bears a single seta. In addition, C. kali males have a very narrow vesicle. Etymology . The patronym honors Prof. Du Yuzhou.