roseovarius atlanticus roseovarius atlanticus roseovarius atlanticus is a gram-negative bacterium from the genus of roseovarius which has been isolated from seawater from the atlantic ocean. roseovarius atlanticus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: roseovarius species: r. atlanticus binomial name roseovarius atlanticusli et al. 2016 type strain kctc 42506, mccc 1a09786, strain r12b