gen. nov., sp. nov., a marine bacterium isolated from the sea sponge .

A Gram-stain-negative, strictly aerobic, motile bacterium, designated strain RKSG073, was isolated from the sea sponge , collected off the west coast of San Salvador, The Bahamas. Cells were curved-to-spiral rods with single, bipolar (amphitrichous) flagella, oxidase- and catalase-positive, non-nitrate-reducing and required salt for growth. RKSG073 grew optimally at 30-37 °C, pH 6-7, and with 2-3 % (w/v) NaCl. The predominant fatty acids of RKSG073 were summed feature 8 (Cω6 and/or Cω7) and C. Major isoprenoid quinones were identified as Q-10 and Q-9. Phylogenetic analyses of nearly complete 16S rRNA genes and genome sequences positioned strain RKSG073 in a clade with its closest relative AH-MY2 (92.1 % 16S rRNA gene sequence similarity), which subsequently clustered with Gri0909, ZC80 and type species of the genera , and . The DNA G+C content calculated from the genome of RKSG073 was 42.2 mol%. On the basis of phylogenetic distinctiveness and polyphasic analysis, here we propose that RKSG073 (culture deposit numbers: ATCC collection = TSD-74, BCCM collection = LMG 29869) represents the type strain of a novel genus and species within the family , order and class , for which the name gen. nov., sp. nov. is proposed.