Cerconychia Klapálek, 1913

Stark, Bill P. & Sivec, Ignac, 2007, A Synopsis Of Styloperlidae (Insecta, Plecoptera) With Description Of Cerconychia Sapa, A New Stonefly From Vietnam, Illiesia 3 (2), pp. 10-16 : 10

Cerconychia Klapálek, 1913

Cerconychia was proposed by Klapálek (1913) for C. brunnea and C. livida , a closely related pair of Taiwanese species. These remained poorly known until Uchida & Isobe (1989) designated male lectotypes and provided comprehensive redescriptions for both species. Included in the Uchida & Isobe (1989) study was the first nymphal description for a species placed in the Styloperlidae . The genus, as currently defined, is distinguished from Styloperla on the basis of a transversely oriented hair brush on male sternum 9, the absence of vaginal sclerites, and a parabolic, lightly sclerotized projection on the apex of male tergum 10. The latter structure is considered a rudimentary epiproct and is flanked basally by a pair of rudimentary hemiterga ( Uchida & Isobe 1989). In addition to the Taiwanese species, Yang & Yang (1995) described C. sinensis from a small sample collected at Jianfengling on Hainan Island