Table 4 Evidence of positive selection on the mitochondrial PCGs of subterranean and surface-dwelling amphipods based on site model

M2a

72

-4021.125381

p:

0.32097

0.56570

0.11334

M1a vs. M2a

0.019437929

31 S 0.977*, 37 N 0.997**

atp8

ω:

0.09324

1.00000

2.44333

M1a

70

-4025.065910

p:

0.37651

0.62349

ω:

0.09961

1.00000

M8

72

-3950.635672

p0 = 0.85323

p = 0.54776

q = 3.55619

M8a vs.M8

0.000013424

37 N 0.875

(p1 = 0.14677)

ω = 1.00000

M8a

71

-3941.161040

p0 = 0.97880

p = 0.73512

q = 3.74996

(p1 = 0.02120)

ω = 1.00000

M2a

72

-42238.654620

p:

0.85660

0.08524

0.05815

M1a vs. M2a

1.000000000

482 Q 0.524

nad5

ω:

0.07211

1.00000

1.00000

M1a

70

-42238.654620

p:

0.85660

0.14340

ω:

0.07211

1.00000

M8

72

-40545.492521

p0 = 0.98460

p = 0.53211

q = 7.22545

M8a vs.M8

0.000000000

482 Q 0.856

(p1 = 0.01540)

ω = 1.00000

M8a

71

-40454.428911

p0 = 0.99711

p = 0.50047

q = 6.79227

(p1 = 0.00289)

ω = 1.00000