Table 2. K2P distances of species in parapatric species pairs and among non-parapatric species, comparing parapatric species pairs that do hybridise with those that do not, and with intrageneric (excluding parapatric species), intraspecific (excluding parapatric species), intraspecific in hybridising parapatric species, and intraspecific in non-hybridising parapatric species (** = 0.01, t-test).

Comparisons	cox1	cob	16S
	K2P Mean±std (N)	K2P Mean±std (N)	K2P Mean±std (N)
Between hybridising parapatric species	3.35±3.05 (191)	2.76±2.28 (662)	1.36±1.23 (119)
Between non-hybridising parapatric species	5.99±4.24 (23)**	6.17±2.36 (69)**	1.01±0.79 (25)
Within all genera (excl. parapatric species)	5.99±3.54 (27162)**	8.2±3.75 (40555)**	3.26±1.91 (1731)**
Within all species (excl. parapatric species)	0.23±0.57 (12924)**	0.72±1.15 (29191)**	0.57±1.18 (246)**
Within hybridising parapatric species	0.49±0.87 (496)**	1.01±1.67 (2488)**	0.28±0.68 (128)**
Within non-hybridising parapatric species	0.37±0.29 (24)**	2.22±2.56 (105)	0.63±1.37 (22)**

Presented are mean±standard deviation (number of comparisons).