Table 1.

List of samples. List of examined species, sampling sites an their geographical positions, population codes (for La Palma localities of P. epigaea and P. hypogaea), numbers of individuals and the mtDNA haplotypes found. Haplotype diversities and their standard deviations are also shown. Tenerife, La Gomera, Gran Canaria, Fuerteventura and Lanzarote are islands of the Canarian archipelago.

Taxa	Locality	Geographical position	Code	Number of individuals	Number of haplotypes	Haplotype diversity (± SD × 10-1)
P. hypogaea	Cueva Honda de Gallegos	28° 49' 43" N 17° 43' 13" W	GA	8	8	9.81 ± 0.80
	Cueva de Palmeros de Aguatavara	28° 43' 59" N 17° 57' 57" W	AG	10	5	8.44 ± 0.80
	Cueva del Arenal	28° 40' 56" N 17° 51' 11" W	AR	6	4	8.00 ± 1.72
	Cueva de la Machacadora	28° 30' 30" N 17° 49' 42" W	MA	13	12	9.87 ± 0.35
	Cueva de los Palmeros	28° 30' 27" N 17° 51' 34" W	PA	8	7	9.29 ± 0.84
	Cueva del Ratón	28° 27' 46" N 17° 50' 47" W	RA	6	6	8.00 ± 1.72
	Cueva de la Buraca	28° 47' 29" N 17° 46' 43" W	BU	2	1	N/A
P. epigaea	Juan Adalid	28° 50' 21" N 17° 54' 27" W	JA	8	7	9.47 ± 2.00
	Andén Verde	28° 49' 51" N 17° 52' 07" W	AV	5	1	N/A
	Barranco de los Franceses	28° 48' 54" N 17° 51' 00" W	FR	6	6	9.52 ± 0.96
	Cubo de la Galga	28° 45' 47" N 17° 46' 35" W	CG	12	10	8.94 ± 0.78
	Barranco de la Galga	28° 46' 02" N 17° 46' 42" W	BG	5	1	N/A
O. guancha	Zapata (Tenerife)	28° 31' 56" N 16° 17' 27" W		10	8	7.56 ± 1.30
O. gomeri	Teselinde (La Gomera)	28° 11' 45" N 17° 17' 16" W		3	3	1.00 ± 2.72
O. sp	Andén Verde (Gran Canaria)	28° 02' 03" N 15° 45' 22" W		2	2	1.00 ± 5.00
O. gammarellus	Ajuí – Madre del Agua (Fuerteventura)	28° 24' 04" N 14° 08' 02" W		1	1	N/A
O. stephenseni	Famara (Lanzarote)	29° 12' 48" N 13° 29' 06" W		10	7	8.00 ± 1.72
Talitroides alluaudi	La Laguna (Tenerife)	28° 28' 31" N 16° 18' 36" W		3	1	NA