Download PDF as one large file - AToL Decapoda

574 Family Portunidae
Genus Ovallpes Rathbun, 1898
Key to species
Carapace with relatively coarse granulation behind frontal margin and inside
anterolateral borders, median elongate tract of slightly but variably enlarged
granules extending from mesogastric to anterior cardiac region .. O. stephehsoni
Carapace with granulation generally fine but more pronounced anteriorly, lacking
narrow tract of slightly enlarged granules in midline O. floridanus
Genus Portunus Weber, 1795
Key to species
[Based on Rathbun, 1930, and Williams, 1984]
1. Carapace wide, anterolateral margins forming arc of circle with center near
posterior margin 2
Carapace narrow, anterolateral margins forming arc of circle with center near
middle of cardiac region 6
2. (1) Stridulating ridge present on lower surface of carapace; spine at posterior angle of
carapace P. vocans
Stridulating apparatus absent; posterior angles of carapace unarmed. .. 3
3. (2) Posterodistal margin of merus of each swimming leg armed with row of spinules
but no spine (frontal teeth blunt; width of merus of swimming legs equal to length
of anterior margin) P. gibbesii
Posterodistal margin of merus of each swimming leg unarmed 4
4. (3) Carapace convex, mostly smooth and glossy; palm of chela swollen, only 1 spine
on upper margin P. sayi
Carapace uneven, not smooth and glossy; 2 spines on upper margin of palm;
submesial teeth of front very small 5
5. (4) Spine at posterodistal margin of merus of cheliped; submesial teeth of front much
less advanced than outer teeth .P. anceps
No spine at posterodistal margin of merus of cheliped; submesial teeth of front
nearly or quite as advanced as outer teeth P. venlratis