Rubidimonas crustatorum gen. nov., sp. nov., a novel member of the family Saprospiraceae isolated from a marine crustacean.

A strictly aerobic, Gram-negative, reddish-orange pigmented, non-motile and rod-shaped bacterium, designated AK17-053(T) was isolated from a marine crustacean (Squillidae) living on tidal flats on the coast of the Ariake Sea, Nagasaki, Japan. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that the novel isolate could be affiliated with the family Saprospiraceae of the phylum Bacteroidetes and that it showed highest sequence similarity (84%) with Lewinella marina MKG-38(T). The strain could be differentiated phenotypically from recognized members of the family Saprospiraceae. The G+C content of DNA was 55.3 mol%, MK-7 was the major menaquinone and iso-C(15:0) and C(16:1)ω7c were the major fatty acids. On the basis of polyphasic taxonomic studies, it was concluded that strain AK17-053(T) represents a new genus of the family Saprospiraceae. We propose the name Rubidimonas crustatorum gen. nov., sp. nov. for this strain; its type strain is AK17-053(T) (= MBIC08356(T) = NBRC 107717(T)).