Table 4.

Classification of individuals for each location based on a geometric morphometric (GM) analysis of the shell

Location	N GM	GM ≥ .90 Littorina fabalis	GM ≥ .90 Littorina obtusata	Intermediate shape
Burela	20	18	1	1
Abelleira	31	13	11	7
Muros North	14	7	5	2
Muros Southa	19	18	0	1
Lanzada North	30	3	22	5
Lanzada Southa	34	32	0	2
Seixiños	38	23	7	8
Aldán North	23	4	7	12
Aldán South	8	2	5	1
Borna	24	6	13	5
Tirán	36	30	3	3
Cangas	49	17	24	8
Redondelaa	36	0	35	1
La Guia	32	5	22	5
Alcabre	29	2	23	4
Canidoa	34	34	0	0
Viana do Casteloa	36	0	36	0
Rio de Moinhosa	36	0	33	3
Póvoa de Varzima	28	28	0	0
Mindelo	47	33	14	0
Agudelaa	26	26	0	0
Cabo do Mundo	39	28	8	3
Leça da Palmeiraa	33	32	0	1
Total	702	361	269	72

N GM, total number of individuals analyzed; GM ≥ .90, number of individuals with a posterior probability equal to or higher than .90 to either species; Intermediate shape, number of individuals not classified to species (posterior probability below .90 to both of them).

^aAllopatric sites were analyzed separately from the sympatric ones (see Section 2).