Table 4 Average pairwise Kimura distances (in % ± standard deviation) for the groups identified in this paper and sequences published earlier for the same species (Oligobrachia CPL clade, Oligobrachia webbi) and other species from the same region (Siboglinum fjordicum) and cold seeps from the Gulf of Mexico (Lamellibrachia luymesi) and the Gulf of Cadiz (Spirobrachia tripeira). Accession numbers (#) of published sequences are listed for the readers’ reference

Group A

4.07 ± 0.19

4.07 ± 0.19

27.62 ± 0.26

2.91 ± 0.19

4.30 ± 0. 20

4.55 ± 0.20

3.82 ± 0.19

5.38 ± 0.17

11.31 ± 0.19

3.14 ± 0.19

Group B

1.54

1.99

26.66

1.31

2.21

2.45

2.21

6.15

10.14

0.65

Group C

30.12 ± 0.28

30.12 ± 0.28

27.51 ± 0.16

29.79 ± 0.28

30.45 ± 0.29

30.78 ± 0.29

30.12 ± 0.28

32.49 ± 0.17

35.85 ± 0.18

30.12 ± 0.28

Group D

1.91 ± 0.13

1.91 ± 0.13

27.19 ± 0. 22

0. 80 ± 0.13

2.14 ± 0.13

2.37 ± 0.13

2.59 ± 0.13

6.77 ± 0.14

10.55 ± 0.15

1.46 ± 0.13

Group E

0. 68 ± 0.18

0. 68 ± 0.18

26.43 ± 0.25

2.24 ± 0.19

0. 90 ± 0.18

1.57 ± 0.19

2.24 ± 0.19

6.31 ± 0.17

10.00 ± 0.18

2.02 ± 0.19

Group F

0. 84 ± 0.20

0. 40 ± 0.20

26.65 ± 0.31

1.95 ± 0.20

0. 62 ± 0.20

1.73 ± 0.20

2.40 ± 0.20

6.48 ± 0.21

10.18 ± 0.22

2.18 ± 0.20

Group G

19.51 ± 0.17

20.07 ± 0.17

29.73 ± 0.21

20.77 ± 0.17

19.79 ± 0.17

19.89 ± 0.17

20.20 ± 0.17

21.59 ± 0.18

18.31 ± 0.17

20.20 ± 0.17

Group H

0. 48 ± 0.50

0. 89 ± 0.42

25.99 ± 0.49

2.03 ± 0.46

1.11 ± 0.42

1.36 ± 0.37

2.03 ± 0.25

6.00 ± 0.33

9.67 ± 0.36

1.81 ± 0.21

Group I

0. 65 ± 0.22

1.09 ± 0.22

25.93 ± 0.21

1.76 ± 0.22

1.31 ± 0.22

1.09 ± 0.22

2.21 ± 0.22

6.21 ± 0.14

9.64 ± 0.15

1.99 ± 0.22

Group J

1.50 ± 0.10

1.94 ± 0.10

26.85 ± 0.16

0. 83 ± 0.10

2.16 ± 0.10

1.95 ± 0.10

2.16 ± 0.10

6.56 ± 0.11

10.32 ± 0.12

1.05 ± 0.10