Table 1 Endosymbiotic bacterial diversity and abundance in the four analysed Otiorhynchus species.

O. salicicola (in total 6073 reads)

JN563736

5516

90.83

AB478978, endosymbiont of Pedicinus obtusus and AJ245596 endosymbiont of Camponotus balzanii (referred to as “Candidatus Blochmanni” endosymbionts throughout the text)

γ-Proteobacteria

JN563737

121

1.99

DQ417336, Schlegelella aquatica

β-Proteobacteria

JN563738

96

1.58

FJ268988, uncultured Acinetobacter

γ-Proteobacteria

JN563739

69

1.14

CU927677, uncultured bacterium

-

JN563740

48

0.79

FJ534956, uncultured bacterium

-

JN563741

44

0.72

EF210100, Enterobacter hormaechei

γ-Proteobacteria

JN563742

34

0.56

AY923125, Streptococcus sp.

Bacilli

JN563743

26

0.43

EU464962, uncultured bacterium

-

JN563744

25

0.41

EU766013, uncultured bacterium

-

JN563745

23

0.38

FJ393126, uncultured Bacteroides sp.

Bacteroidetes

JN563746

18

0.30

EU721814, uncultured epsilon proteobacterium

ε-Proteobacteria

JN563747

17

0.28

AY953252, Prevotella sp.

Bacteroidetes

JN563748

15

0.25

FJ799146, bacterium enrichment culture clone LA29

-

JN563749

11

0.18

EU802152, uncultured bacterium

-

JN563750

10

0.16

AY568512, Burkholderia fungorum

β-Proteobacteria

O. rugosostriatus (in total 8584 reads)

JN563751

7800

90.87

AB021128, Rickettsia sp.

α-Proteobacteria

JN563752

396

4.61

EF633744, Candidatus Neoehrlichia lotoris

α-Proteobacteria

JN563753

338

3.94

AB478978, endosymbiont of Pedicinus obtusus and AJ245596 endosymbiont of Camponotus balzanii (referred to as “Candidatus Blochmanni” endosymbionts throughout the text)

γ-Proteobacteria

JN563754

17

0.20

AB021128, Rickettsia sp.

α-Proteobacteria

JN563755

11

0.13

EF633744, Candidatus Neoehrlichia lotoris

α-Proteobacteria

JN563756

7

0.08

AB021128, Rickettsia sp.

α-Proteobacteria

JN563757

6

0.07

AB021128, Rickettsia sp.

α-Proteobacteria

JN563758

5

0.06

FJ868862, uncultured bacterium

-

JN563759

4

0.05

GQ845011, Nevskia sp.

γ-Proteobacteria

O. sulcatus (in total 6412 reads)

JN563760

6358

99.16

AB021128, Rickettsia sp.

α-Proteobacteria

JN563761

35

0.55

EF633744, Candidatus Neoehrlichia lotoris

α-Proteobacteria

JN563762

19

0.30

EF633744, Candidatus Neoehrlichia lotoris

α-Proteobacteria

O. armadillo (in total 6311 reads)

JN563763

5900

93.49

AB478978, endosymbiont of Pedicinus obtusus and AJ245596 endosymbiont of Camponotus balzanii (referred to as “Candidatus Blochmanni” endosymbionts throughout the text)

γ-Proteobacteria

JN563764

60

0.95

FJ823944, uncultured Comamonas sp.

β-Proteobacteria

JN563765

54

0.86

FJ868862, uncultured bacterium

-

JN563766

43

0.68

FJ823944, uncultured Comamonas sp.

β-Proteobacteria

JN563767

35

0.55

FJ544375, Comamonas aquatica

β-Proteobacteria

JN563768

31

0.49

EU560802, uncultured bacterium

-

JN563769

23

0.36

DQ407746, primary endosymbiont of Liposcelis decolor

-

JN563770

21

0.33

DQ469223, uncultured bacterium

-

JN563771

21

0.33

GQ845011, Nevskia sp.

γ-Proteobacteria

JN563772

20

0.32

DQ860049, uncultured bacterium

-

JN563773

11

0.17

AF006670, Shewanella putrefaciens

γ-Proteobacteria

JN563774

11

0.17

X82133, Shewanella putrefaciens

γ-Proteobacteria

JN563775

11

0.17

EU801479, uncultured bacterium

-

JN563776

10

0.16

EF019306, uncultured proteobacterium

-

JN563777

9

0.14

AY953252, Prevotella sp.

Bacteroidetes

JN563778

8

0.13

EU464962, uncultured bacterium

-

JN563779

8

0.13

EU536078, uncultured bacterium

-

JN563780

8

0.13

GQ068015, uncultured bacterium

-

JN563781

8

0.13

L16490, Porphyromonas asaccharolytica

Bacteroidetes

JN563782

8

0.13

AY351787, uncultured marine bacterium

-

JN563783

6

0.10

EF648074, uncultured Azoarcus sp.,

β-Proteobacteria

JN563784

5

0.08

EF648074, uncultured Azoarcus sp.,

β-Proteobacteria