Retrieval of the species Alteromonas tetraodonis Simidu et al. 1990 as Pseudoalteromonas tetraodonis comb. nov and emendation of description

A polyphasic taxonomy study was undertaken of three strains of Pseudoaltero monas haloplanktis subsp. tetraodonis (Simidu et ah 1990) Gauthier et al. 1 995. DNA was prepared from each of the strains and genomic relatedness was measured by DNA-DNA hybridization. Strains KMM 458(T) and IAM 14160(T) shar ed 99 % genetic relatedness, but were only 48-49 % related to the type stra in of Pseudoalteromonas haloplanktis subsp. haloplanktis, IAM 12915(T). The third strain, P, haloplanktis subsp. tetraodonis A-M, showed 83 % genetic similarity with P. haloplanktis subsp, haloplanktis IAM 12915(T) and 32 % w ith KMM 458(T). From these results, it is concluded that strains KMM 458(T) and IAM 14160(T) comprise a separate species, originally described as Alte romonas tetraodonis, whereas strain A-M belongs to the species Pseudoaltero monas haloplanktis. Based on phenotypic and chemotaxonomic data, genomic fi ngerprint patterns, DNA-DNA hybridization data and phylogenetic analysis of 16S rRNA, it is proposed that the species Alteromonas tetraodonis be retri eved and recognized as Pseudoalteromonas tetraodonis comb. nov. (type strai n IAM 14160T = KMM 458T).