Tateyamaria omphalii gen. nov., sp. nov., an α-Proteobacterium isolated from a top shell Omphalius pfeifferi pfeifferi

A Gram-negative, strictly aerobic, coccoid to short rod-shaped marine bacterium strain MKT107T was isolated from the molluscan top shell Omphalius pfeifferi pfeifferi collected on the coast of Japan. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain MKT107T constitutes a new lineage in α-Proteobacteria related to the genera Nereida, Roseobacter, Staleya, Oceanibulbus and Sulfitobacter. Strain MKT107T was found to require salt for its growth and to be mesophilic. It contained 18:1ω7c and 16:0 as major cellular fatty acids and 3-OH 10:0 and 3-OH 12:0 as hydroxy fatty acids. The DNA base composition of the isolate was 61.6 mol% G+C. The major quinone was Q-10. Sufficient differences existed to distinguish this strain from currently recognized bacterial genera. Therefore, the isolate is classified as representing a new genus and species, Tateyamaria omphalii gen. nov., sp. nov. (type strain MKT107T =IAM 15108T =KCTC 12333T; GenBank accession no. AB193438).