TABLE 1. — Comparison of some morphological features described by different authors for P. colombiensis in the Americas. Abbreviations: Ri, inner ramus; Re, external ramus; P5, fifth leg.

Features	Gaviria (1989)	Wilson & Yeatman (1959)	Kiefer (1956)	Dussart & Defaye (1995)	Specimens from Tabasco
Female: urosomites	2 or 3	not reported	2	2	2 or 3
Female P5: endopod	2-segmented	1-segmented	1-segmented	1-segmented	2-segmented
Female P5: Re 1/Ri	2.07	1.85	1.88	1.88	2.03
Female P5: spine on Re3/Re2 + end claw	3.1	2.6	3.0	3.0	2.1
Female P5: Re2 + end claw/Re 1	1.0	1.0	0.82	0.82	0.6-0.75
Male P5 basipod: inner margin processes	single, subtriangular	single, rounded, on midlength	double, one rounded, proximal and one on midlength	double, one rounded, proximal and one on midlength	single, rounded, on midlength
Male right P5: Re 1 inner margin	smooth	smooth	lamella ends in subtriangular process	lamella ends in subtriangular process	lamella ends in subtriangular process
Male right P5: Re 1 distal margin	smooth	smooth	with one rounded	with one rounded process	with two rounded
			process		processes
Male right P5: number of teeth on aculeus	5	6-8	5	5	4-5