0.01

Pontirhabdus pectinovorans JC2675T (HM475134)

Algibacter aquimarinus KYW589T (JQ259859)

Marinivirga aestuarii KYW371T (HQ405792)

‘Arenitalea lutea’ P7-3-5T (JQ807811)

Algibacter mikhailovii KMM 6171T (AM491809)

Algibacter lectus KMM 3902T (AY187689)

‘Algibacter undariae’ WS-MY9T (KC261664)

Algibacter miyuki WS-MY6T (KC662118)

‘Algibacter agarivorans’ KYW560T (JN864025)

‘Algibacter agarilyticus’ KYW563T (JN864027)

Tamlana crocina HST1-43T (AM286230)

Postechiella marina M091T (HQ336487)

Flaviramulus basaltis H35T (DQ361033)

Mariniflexile gromovii KMM 6038T (DQ312294)

Mariniflexile aquimaris HWR-17T (HQ144198)

Gaetbulibacter marinus IMCC1914T (EF108219)

Gaetbulibacter lutimaris D1-y4T (JF739861)

Gaetbulibacter saemankumensis SMK-12T (AY883937)

Bizionia hallyeonensis T-y7T (JN885199)

Bizionia echini KMM 6177T (FJ716799)

Bizionia argentinensis JUB59T (EU021217)

Formosa spongicola A2T (FJ348469)

Formosa algae KMM 3553T (AY228461)

Bizionia paragorgiae KMM 6029T (AY651070)

Olleya namhaensis WT-MY15T (JQ327134)

Olleya aquimaris L-4T (FJ886713)

Olleya marilimosa CAM030T (EF660466)

Flavivirga amylovorans JC2681T (HM475138)

Flavivirga jejuensis JC2682T (HM475139)

Psychroserpens mesophilus KOPRI 13649T (DQ001321)

Psychroserpens burtonensis ACAM188T (U62913)

Capnocytophaga ochracea ATCC 27872T (U41350)

Tamlana agarivorans JW-26T (EU221275)

Supplementary Fig. 1 Maximum-likelihood phylogenetic tree based on 16S rRNA gene sequences

showing the positions of Algibacter miyuki WS-MY6T, the type strains of other Algibacter species and

representatives of some other related taxa. Capnocytophaga ochracea ATCC 27872T (GenBank accession

no. U41350) was used as an outgroup. Bar, 0.01 substitutions per nucleotide position.