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Table 1 Divergence times

From: Climate-driven diversification in two widespread Galerida larks

Node

Divergence event

Bootstrap

Divergence time 2%/MY

Climatic event

Divergence time 1.5%/MY

Divergence time 2.5%/MY

1

species of crested/sp. of Thekla

83, 92, 93

4.96 [3.86–6.09]

/

6.61 [5.15–8.12]

3.97 [3.09–4.87]

2

Ethiopian/Palearctic Thekla

94, 98,100

2.81 [2.11–3.56]

Aridification 2.8 ± 0.2

3.75 [2.81–4.75]

2.25 [1.69–2.85]

3

ellioti/praetermissa

84, 69, 82

1.83 [1.23–2.43]

Aridification 1.7 ± 0.1

2.44 [1.64–3.24]

1.46 [0.98–1.94]

4

hueii/praetermissa

82,82,80

1.08 [0.55–1.65]

Aridification 1.0 ± 0.2

1.44 [0.73–2.20]

0.86 [0.44–1.32]

5

Div. within G. theklae *

98,100,100

0.15 [0.03–?]

Glacial cycles < 0.9

0.20 [0.04–?]

0.12 [0.02–?]

6

Div. 3 species crested larks

100,100,98

1.77 [1.15–2.46]

Aridification 1.7 ± 0.1

2.36 [1.53–3.28]

1.42 [0.92–1.97]

7

Div. within G. randonii

100,99,93

/

/

/

/

8

Div. within G. cristata *

99,89,75

0.39 [0.07– ?]

Glacial cycles < 0.9 MYA

0.52 [0.09–?]

0.31 [0.06–?]

9

Div. within G. c. cristata

93,80,80

/

/

/

/

10

Div. within G. c. somaliensis

85,96,94

/

/

/

/

  1. Bootstrap support (NJ, MP, ML) and estimates of divergence times in million years ago (using BEAST or MDIV – latter indicated with * -) derived for various nodes of the mitochondrial phylogeny (shown in Fig. 2) using the standard molecular clock of 2% per million year [95% credibility interval]. Possible coincidence with some climatic events in MYA (after [21]) is indicated, as well as modified estimates derived from slightly different molecular clocks (1.5 to 2.5%/MY; see additional file 1b for further details).