oceanicaulis oceanicaulis in taxonomy, oceanicaulis is a genus of the maricaulaceae. oceanicaulis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: caulobacterales family: maricaulaceae genus: oceanicaulisströmpl et al. 2003 species oceanicaulis alexandrii strömpl et al. 2003 oceanicaulis stylophorae chen et al. 2012