O. Merkl szerk.: Folia Entomologica Hungarica 66. (Budapest, 2005)

Key to the species groups of the subgenus Xeroconiopteryx Scape of male very broad, its outer side lobiform; processes apicales of parameres in ventral direction very long, and merged ventrally (Figs 57-58) C. (X.) paranana group Structure of scape and paramere not as above 2 Paramere with an extremely large, straight, dagger-like dorsal projection subapically (Figs 70, 72) 3 Structure of paramere not as above 4 Median incision of hypandrium small, U-shaped (Fig. 73) C. (X.) zulu group Median incision of hypandrium very large, V-shaped (Fig. 71) C. (X.) virgina group Processus lateralis of hypandrium long, thorn-like, or narrow, tounge-like, and placed low (Figs 68-69); male flagellar segments without scale-like hairs C. (X.) unguihipandriata group Processus lateralis of hypandrium not as above; if somewhat similar (stick- or tongue-shaped), male flagellar segments with scale-like hairs 5 Caudal end of paramere with acute dorsal and a similar ventral projections (Fig. 61) C. (X.) ressli group Structure of paramere not as above 6 Caudal part of paramere wavy, wide, with pointed end (Fig. 54) C. (X.) obtusa group Structure of paramere not as above 7 Gonarcus with internal projection (Figs 55-56) C. (X.) orba group Gonarcus without internal projection 8 Male antennae with a regular whorl of sparse scale-like hairs before both whorls of ordinary hairs (Fig. 35) C. (X.) aegyptiaca group Scale-like hairs absent from flagellar segments of male antennae, or situated in other position (Figs 40, 47) 9