Table 4. Pair-wise F _ST values between pairs of populations of Mexipyrgus churinceanus.

	JS	CH	Esc	LR	LRS	MEA	MEB	MO	RM	TB	TCS	TCN
JS (W)	0.00
CH (W)	0.00	0.00
LR (RM)	0.95	0.93	0.00
LRS (RM)	1.00	1.00	0.00	0.00
MEA (RM)	0.97	0.96	0.16	0.45	0.00
MEB (RM)	0.96	0.94	0.11	0.37	0.00	0.00
MO (RM)	0.94	0.93	0.16	0.34	0.24	0.06	0.00
RM (RM)	0.98	0.97	0.00	0.00	0.35	0.30	0.32	0.00
TB (RM)	0.98	0.98	0.72	0.90	0.79	0.75	0.71	0.84	0.00
TCS (SE)	0.97	0.96	0.63	0.77	0.71	0.66	0.63	0.72	0.82	0.00
TCN (SE)	0.98	0.98	0.59	0.83	0.70	0.62	0.57	0.75	0.83	0.47	0.00

AMOVA: variance among populations = 87.5%, variance within populations  = 12.5%. P<0.0001

Population abbreviations as in Table 1. Drainages: western (W), Río Mesquites (RM), and southeastern (SE). Significant F _ST (i.e. different from zero) are shown in bold.