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

16 Gonarcus almost always very long and usually broad (Figs 65-67); when gonarcus moderately long, it is very broad (Figs 63-64) C. (X.) rostrogonarcuata group - Gonarcus very short (Figs 38-39), or moderately long, but narrow (Fig. 37) C. (X.) bicuspis group Key to the species groups of the genus Semidalis Paramere pipe-like (Fig. 81) S. boliviensis group (sensu MEINANDER 1990) Shape of paramere not as above 2 Middle or distal part of paramere much wider than proximal part; wide part plate-like or lobiform, divided into hooks or wide teeth (Figs 76, 78, 102) 3 Paramere not or only slightly and evenly widened distally; when widened, not plate-like or lobiform, but swollen (Figs 80, 83, 86, 90-91) 10 Widened part of paramere (before the hooked ending) rectangular or trapezoid (Figs 78-79, 89) 4 Widened part of paramere not rectangular or trapezoid (Figs 76, 102) 5 Widened part of paramere situated dorsally (Fig. 78) S. angusta group Widened part of paramere situated ventrally (Fig. 89) S. marginális group Distal part of paramere dorsally consisting of three wide, blunt teeth; a very strongly chitinized sclerite present below parameres, in addition to uncini (Fig. 102) S. scotti group Structure of genitalia not as above 6 Long, separated dorsal tooth present subapically, near to hooked end of paramere (Fig. 74) S. africana group Shape of the paramere not as above 7 Distal part of paramere circular or oval in lateral view (Fig. 82) S. Candida group Distal part of paramere not circular or oval in lateral view 8 Distinct stylus present in male genitalia (Fig. 84); distal part of paramere pick-like, strongly curved upwards (Fig. 85) S. decipiens group