Table 1. Genetic distances (±standard error) between recovered clades of O. angulata based on a Kimura 2-Parameters model for COI.

Inter-specific distance values are presented below the diagonal. Numbers along the diagonal in bold and brackets represent intra-specific variation. Genetic distances were compared with the congeneric species Ophiothrix lineata and O. suensonii distributed in the Caribbean and Gulf of Mexico; Ophiothrix cimar distributed in the Caribbean and Ophiactis savignyi (outgroup).

COI	Clade 1	Clade 2	Clade 3	O. cimar	O. lineata	O. suensonii	O. savignyi
Clade 1	[0.032 ± 0.004]
Clade 2	0.170 ± 0.019	[0.007 ± 0.001]
Clade 3	0.279 ± 0.028	0.264 ± 0.026	[0.053 ± 0.006]
O. cimar	0.316 ± 0.032	0.310 ± 0.033	0.278 ± 0.028	−
O. lineata	0.276 ± 0.028	0.253 ± 0.027	0.254 ± 0.026	0.133 ± 0.016	−
O. suensonii	0.304 ± 0.030	0.278 ± 0.029	0.274 ± 0.028	0.243 ± 0.027	0.264 ± 0.028	−
O. savignyi	0.323 ± 0.032	0.302 ± 0.031	0.319 ± 0.032	0.279 ± 0.030	0.263 ± 0.027	0.302 ± 0.032	−