Reclassification Of Alteromonas Fuliginea (Romanenko Et Al. 1995) As Pseudoalteromonas Fuliginea Comb. Nov And An Emended Description

A new aerobic marine bacterium, strain S3431, was isolated from swab samples of an unidentified polychaete near Canal Concepcion, Chile. This strain was thought to represent a new taxon within the genus Pseudoalteromonas. Although DNA-DNA reassociation values showed less than 70% genomic DNA relatedness to established Pseudoalteromonas type strains, it shared 78% DNA-DNA relatedness with Alteromonas fuliginea DSM 15748 (=KMM 216) (Romanenko et al., 1994). A. fuliginea has later been considered a heterotypic synonym of Pseudoalteromonas citrea (Ivanova et al., 1998). Relatedness between strains S3431, A. fuliginea DSM 15748 and the type strain P. citrea LMG 12323(T) was therefore studied. Physiological traits and genomic information were shared at a high level by strains S3431 and DSM 15748, but not between these and P. citrea LMG 12323(T). There was only approximately 20% DNA-DNA relatedness between P. citrea LMG 12323(T) and strains S3431 and DSM 15748. Based on the available phylogenetic and phenotypic data, the reclassification of A. fuliginea DSM 15748 (Romanenko et al., 1995) -> Pseudoalteromonas citrea (Ivanova et al., 1998) as Pseudoalteromonas fuligineacomb. nov. is proposed, and strain S3431 should be assigned to this new species. The name Pseudoalteromonas fuliginea is proposed with KMM 216(T) (=DSM 15748(T)=CIP 105339(T)) as the type strain.