Table 1. Collection site information in Argentina, Chile, the Falkland Islands and Uruguay, including habitat (subtidal or intertidal), geographical coordinates, number of mussels (Mytilus spp.) collected (N), and date of collection (DD.MM.YYYY).

Site	Habitat	Coordinates	N	Date
ARGENTINA
Mar del Plata	S	38°00’32.0’’S; 57°31’48.1’’W	10	02.08.2010
Punta Cuevas	S	42°46’47.0’’S; 65°00’06.0’’W	10	15.07.2014
Caleta Cordova	S	45°45’64.0’’S; 67°21’40.3’’W	20	22.07.2015
Punta Peña	S	49°14’45.0’’S; 67°40’18.0’’W	20	05.09.2010
CHILE
Isla Quiriquinas	I	36°37’49.9’’S; 73°03´09.2’’W	20	21.01.2016
Lota	I	37°04’27.1’’S; 73°09´53.4’’W	20	26.01.2016
Tubul	S	37°13’37.3’’S; 73°26’02.2’’W	20	05.12.2015
Llico	S	37°10’06.9’’S; 73°33’41.5’’W	20	05.12.2015
Puerto Saavedra	S	38°46’44.7’’S; 73°24´32.3’’W	20	15.12.2015
Chaihuín	S	39°56’40.4’’S; 73°34´40.4’’W	20	22.11.2015
Maullín	I	41°37’25.3’’S; 73°35´36.9’’W	20	27.11.2015
Quillaipe	I	41°32’59.5’’S; 72°45´14.0’’W	20	16.12.2015
Huildad	I	43°03’02.8’’S; 73°34´21.1’’W	20	28.11.2015
Puerto Cisne	S	44°44’11.4’’S; 72°41´07.9’’W	20	22.02.2016
San Gregorio	I	52°34’01.8’’S; 70°04’13.8’’W	10	22.10.2013
Caleta Pescadores	I	53°21’06.2’’S; 70°57’27,8’’W	20	21.10.2013
Estero Fanny	S	53°05’04.6’’S; 72°18’39.6’’W	20	17.10.2013
Isla London	S	54°40’57.6’’S; 71°55’29.7’’W	10	15.09.2013
URUGUAY
Punta del Este	I	34°58’05.8’’S; 54°56’48.4’’W	20	05.06.2014
FALKLAND ISLANDS
Bense Island	S	51°28’59.9’’S; 60°30’00.1’’W	8	14.10.2002
Total number of mussels			348