Cerconychia (Uchida & Isobe, 1989)

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 : 11

Provisional key to Cerconychia males

1. Dorsum of basal cercal segment bearing a patch of at least 10 short thick spines which continue along outer margin of process to apex; known from Vietnam ( Fig. 2 ) …….………………………. C. sapa

Dorsum and margin of basal cercal segment and process without clusters of short thick spines......................................................................... 2

2. Process of basal cercal segment rounded apically and bearing a cluster of terminal spines; known from Hainan .............................................. C. sinensis

Process of basal cercal segment acute apically and lacking terminal spine cluster; known from Taiwan....................................................................... 3

3. Dorsum of basal cercal segment swollen near base of process and with a small constriction at process base ............................................................ C. brunnea

Dorsum of basal cercal segment and process without swelling or constriction ……....... C. livida

Figures

Figs. 1‐6. Cerconychia sapa structures. 1. Head and pronotum, 2. Male terminalia dorsal, 3. Male terminalia, lateral, 4. Male terminalia, oblique lateral. 5. Female terminalia, ventral.