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9. (1) Carapace subquadrate, anterior margin almost completely occupied by front and
elongate orbits 10
Carapace xanthoid, anterior margin consisting of front, orbits, and anterior part of
arched, toothed, anterolateral border 12
10. (9) Two anterolateral teeth present, including outer orbital Sotoplax rdberisi
Three anterolateral teeth present ...11
11. (10) Antennae excluded from orbit EiiiypltiX nitida
Antennae entering orbit. TrapeziopldX tridehtdta
12.(9) Posterolateral borders imperceptibly convergent (almost parallel); eyestalks
tapering to reduced cornea and conspicuously hairy Speocarcinus tobcitiis
Posterolateral borders obviously convergent; eyestalks rather thick and riot
conspicuously hairy 13
13. (12) Fronto-orbital border about half total width of carapace........................;....,.,...
PseudorhoMila quadridentata
Fronto-orbital border from 3/5 to 3/4 total width of carapace 14
14. (13) Carapace broad, width 1.5 times length (anterolateral teeth with smooth margins,
first 2 coalesced, third largest, obtuse, with strongly curved lateral margin)
Panoplax depressa
Carapace narrow, width 1.3 times length. 15
15. (14) Merus of outer (third) maxillipeds with antero-external angle prominent,
acutangular (front prominent and almost straight, with small median notch; usually
4 anterolateral teeth, second tooth largest; carpus of chelipeds smooth)
Glyptopldx sntithii
Merus of outer maxillipeds with antero-external angle neither prorninent nor
acutangular (carapace narrow, hexagonal; five anterolateral teeth, including orbital
tooth) Eucratopsis crassimanus