rhodopirellula caenicola rhodopirellula caenicola rhodopirellula caenicola is a gram-negative, strictly aerobic and non-motile bacterium from the genus of rhodopirellula which has been isolated from isolated from iron sand. rhodopirellula caenicola scientific classification domain: bacteria phylum: planctomycetota class: planctomycetia order: pirellulales family: pirellulaceae genus: rhodopirellula species: r. caenicola binomial name rhodopirellula caenicolayoon et al. 2015 type strain kctc 32995, nbrc 110016, strain ym26-125