Download PDF as one large file - AToL Decapoda

Genus Parapinnixa Holmes, 1894
Key to species
[Adapted from Williams, 1984]
Family Pinnotheridae 683
Carapace less than twice as wide as long , P. bouvieri
Carapace more than twice as wide as long P. hendersoni
Genus Pinnixa White, 1846
Key to species
[Based on Williams, 1984]
1. Dorsal surface of carapace with four prominent transverse ridges
. .... P. leptosynaptae
Dorsal surface of carapace without four transverse ridges 2
2. (1) Posterior part of carapace with conspicuous, sharp, transverse ridge extending
uninterruptedly from side to side 3
Posterior part of carapace without transverse ridge or with ridge falling well short
of lateral margin of carapace 4
3. (2) Carapace less broad, width-length ratio 2.5; lateral angles less acutely produced;
third walking leg proportionately heavier, length-width ratios of merus and
propodus 2.2 and 1.6 respectively, with no dense pubescence on posterior margin;
female without rudimentary proximal tooth above immovable finger P. chacei
Carapace more broad, width-length ratio 2.85; lateral angles more acutely produced;
on third walking leg, length-width ratios of merus and propodus 2.9 and 1.8
respectively, with rather dense pubescence on posterior margin; female with
rudimentary proximal tooth above immovable finger P. cristata
4. (2) Chela with inner margin of dactylus not smoothly bent 90° at 1/4 to 1/2 distance
from its proximal end when flexed 5
Chela with inner margin of dactylus smoothly bent 90° at 1/4 to 112 distance from
its proximal end (adult male with dactylus flexed) 10
5. (4) Immovable finger of chela with prehensile edge variously toothed, merging with
lower margin at tip 6
Immovable finger of chela with prehensile edge and lower margin connected
distally by subterminal, oblique margin (female and juvenile male) 10