Table 2.

dsrAB gene sequence identities among the proposed candidate species of cable bacteria.

Cluster	Name of species within the cluster	dsrAB gene identity
		With cluster I [%]	With cluster II [%]	With cluster III [%]	With cluster IV [%]	With cluster V [%]	With cluster VI [%]
I	“Ca. Electrothrix marina”a	99.6–99.9	91.3–91.9	88.5–88.6	89.3–90.6	n. d.	80.2–81.6
II	“Ca. Electrothrix aarhusiensis”	91.3–91.9	100	89.4	91.4–92.4	n. d.	78.3–80.2
III	“Ca. Electrothrix japonica”	88.5–88.6	89.4	100	87.5–88.6	n. d.	76.9–79.1
IV	“Ca. Electrothrix communis”1	89.3–90.6	91.4–92.4	87.5–88.6	100	n. d.	75.5–79.8
V	“Ca. Electronema nielsenii”	n. d.	n. d.	n. d.	n. d.	n. d.	n. d.
VI	“Ca. Electronema palustris”1	80.2–81.6	78.3–80.2	76.9–79.1	75.5–79.8	n. d.	100
Desulfobulbus	D. mediterraneus 86FS1	78.9–79.5	78.7	78.9	77.5–79.8	n. d.	73.6–76.7
Desulfobulbus	D. propionicus DSM 2032	78.6–79.4	77.9	76.8	75.5–77.4	n. d.	73.2–78.3

^aIncludes partial sequences.

n. d., no data; for further details see Table S2.