oxalicibacterium horti oxalicibacterium horti oxalicibacterium horti is a gram-negative, rod-shaped, non-spore-forming, yellow-pigmented bacterium from the genus oxalicibacterium and family oxalobacteraceae. o. horti uses potassium oxalate as a sole carbon source. its 16s rrna gene sequence analysis has shown that it belongs to the order of betaproteobacteria, most closely to oxalicibacterium flavum. oxalicibacterium horti scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: oxalobacteraceae genus: oxalicibacterium species: o. horti binomial name oxalicibacterium hortisahin et al. 2009, sp. nov. type strain bcrc 11911, ccrc 11911, dsm 21640, ifo 13594, nbrc 13594, ncib 8735, ncimb 8735, od1 synonyms pseudomonas sp. (former name)