Table 5.

Mantel test results (a, COI; b, 16S) to identify isolation‐by‐distance (IBD) patterns and correlations between genetic distance and geographic barriers after controlling for geographic distance in Pygmarrhopalites A10 and Pogonognathellus T4

Barrier	R value
	Pygmarrhopalites A10	Pogonognathellus T4
(a)
Geographic distance	0.79 ***	0.37**
Cave boundaries	0.27*	0.62****
Sinkhole area boundaries	0.63 ***	−0.19*
Mississippi River Valley	0.54 ***	−0.21*
(b)
Geographic distance	0.79 ***	0.45**
Cave boundaries	0.18	0.63 ***
Sinkhole area boundaries	0.5 ***	0.28**
Mississippi River Valley	0.85 ***	−0.23**

Bold values indicate strongly positive correlations.

Significance is based on 100,000 permutations: *p < 0.05, **p < 0.01, ***p < 0.001.