Pycnoplax Castro 2007, N. GEN.

KEY TO SPECIES OF PYCNOPLAX N. GEN.

1. Two acute, thin, spine-like anterolateral teeth (see Fig. 13B).......... Pycnoplax bispinosa

— Two triangular anterolateral teeth which may have acute tips but never thin, spine-like................................................................................................................................... 2

2. Ambulatory legs (P2-P5) long, relatively slender, distal end of merus of folded P5 extending beyond tip of second anterolateral tooth (see Fig. 13A). G2 with pointed tip without terminal spinules (see Guinot 1969a: fig. 74; 1989: fig. 31B; Chen 1984: figs 3-7, 3-8, as Carcinoplax surugensis)............................................................... Pycnoplax surugensis

— Ambulatory legs (P2-P5) relatively short, distal end of merus of folded P5 only reaching or barely reaching tip of second anterolateral tooth. G2 with terminal spinules (see Fig. 16D)................................................................................................................................... 3

3. Leaf-like, granular, shallow tooth on each outer orbital angle (see Figs 16A; 17). Short tooth on each suborbital border.............................................. Pycnoplax latifolia n. sp.

— Triangular, pointed tooth on each outer orbital angle. Conspicuous tooth on each suborbital border........................................................................................................................ 4

4. Second anterolateral tooth curved, hook-like, acute tip (see Poore 2004: fig. 140c). Dorsal surface of carapace relatively smooth......................................... Pycnoplax meridionalis

— Second anterolateral tooth triangular, obtuse tip (see Poore 2004: fig. 140d). Two shallow horizontal ridges on dorsal surface of carapace.............................. Pycnoplax victoriensis