THE APICOARGENTEUS GROUP

22(12). Claspette with distal expanded portion square in dorsal aspect, apicomesal angle formed a thumb­like projection, with numerous simple setae on the expanded distal portion and bearing no spine­like setae on the apicomesal angle (Figs. 36 A,B; 37A,B; 38A,B) ..................................................................................................... 23 Claspette with distal expanded portion subtriangular in dorsal aspect (narrows towards apicomesal angle, with apicolateral corner rounded), apicomesal angle formed a slight projection, with numerous simple setae on the expanded distal portion and bearing 2 stong, basally widened spine­like setae on the apicomesal angle (Fig. 39 B) .................................................................................................... soleatus

23(22). Apicomesal angle of claspette with a thumb­like projection and bearing at its tip a row of 7–9 setae (Figs. 36 A,B; 37A,B)................................................................ 24 Apicomesal angle of claspette with a narrow thumb­like projection and bearing 3– 4 setae at tip of the projection (Figs. 38 A,B) ....................................................... 27

24(23). Claspette with apicomesal angle formed a narrower thumb­like projection and bearing 9 setae at tip of the projection, with apicolateral corner rounded; gonostylar claw rather short, at most 0.20 length of gonostylus (Fig. 37 B) ......... ealaensis Claspette with apicomesal angle formed a broader thumb­like projection, with apicolateral angle pointed (Figs. 36 A,B; 37A) ......................................................... 25

25(24). Claspette with basolateral corner rounded; gonostylar claw long, at least 0.26 length of gonostylus (Fig. 37 A) ........................................................... denderensis Claspette with basolateral corner drawn into a broad beak­like projection (Figs. 36 A,B).................................................................................................................26

26(25). Claspette with lateral side rather straight, with 8–9 setae on the apicomesal angle (Fig. 36 A) ........................................................................................ apicoargenteus Claspette with lateral side rounded, with 7 setae on the apicomesal angle (Fig. 36 B) ..................................................................................................................... schwetzi

27(23). Gonostylar claw rather short and stout, about 5.5 times as long as wide (Fig. 38 B) .................................................................................................................. blacklocki Gonostylar claw long and slender, about 7 times as long as wide (Fig. 38 A) fraseri