Table 2

Estimates of the number of cell types in eukaryotes at different times in past

Group or node^a

Age (Ma)

Maximum cell types

Squared-change parsimony

Linear parsimony

Node 1

310

118

120

Node 2

360

114

120

Node 3

450

104

120

Node 4

520

77

68

Node 9

558

6.1

5

Node 17

717

28.5

26

Node 10

723

3.1

3

Node 14

954

5.7

3

Node 18

956

15.5

9.5

Node 5

974

60

68

Node 13

974

5.7

3

Node 11

985

4.3

3

Node 12

1024

3.7

3

Node 6

1308

33.9

22

Node 7

1355

19.9

16

Node 19

1423

12.7

9.5

Node 8

1450

9.7

3

Node 15

1547

7.3

3

Node 16

1586

6.3

3

Node 20

1624

8.7

8.5

Node 22

1956

7.2

8.5

Node 21

1956

7.2

8.5

Node 23

2291

3.9

2

a-Nodes correspond to phylogenetic tree of eukaryotes (Fig. 2).

Hedges et al. BMC Evolutionary Biology 2004 4:2   doi:10.1186/1471-2148-4-2