1a. Antennal tooth very strong, fifth pleuron with posterior margin unarmed [Indo-West Pacific: Australia, 1–15 m].................................................................................... P. enigma Chace & Brown, 1978
1b. Antennal tooth absent or minute; fifth pleuron with posterior margin armed with acute, ventroposteriorly directed tooth.... 2
2a. Carpus of third, fourth and fifth pereiopod without stout spiniform setae on ventrolateral surface [Indo-West Pacific: Indonesia, ~ 10 m].................................................................. P. neutra De Grave & Moosa, 2004
2b. Carpus of third, fourth and fifth pereiopod each with stout spiniform seta on ventrolateral surface...................... 3
3a. Coxa of third and fourth pereiopod each with long, spine-like projection on mesial surface; basis of third pereiopod with smaller, spine-like projection on mesial surface; rostrum with 6–8 dorsal teeth, including one posterior to post-orbital margin [North-West Atlantic: Florida, Belize, 6–28 m............................................. P. chacei Kensley, 1983
3b. Coxa of third and fourth pereiopod without spine-like projections on mesial surface; basis of third pereiopod without spine-like projection on mesial surface; rostrum with 5 dorsal teeth, all anterior to post-orbital margin [South-West Atlantic: Brazil, 68–71 m]........................................................................... P. falsapinca sp. nov.