Tab. 3. Mahalanobis squared distances between Agonostomus monticola groups using: (a) linear measurements (Hubbs, Lagler, 1958; Bookstein, 1982) and (b) landmark-based method (Rohlf (2005)).

Linear measures
a)	Pacifico-B	Caribbean	Pacific-A	NE México
Pacifico-B	0
Caribbean	13.56	0
Pacific-A	10.72	13.07	0
NE México	15.95	8.24	9.25	0
Geometric morphometry
b)	Pacifico-B	Caribbean	Pacific-A	NE México
Pacifico-B	0
Caribbean	4.875	0
Pacific-A	5.108	4.272	0
NE México	5.886	4.233	3.835	0