rhodopseudomonas faecalis rhodopseudomonas faecalis rhodopseudomonas faecalis is a gram-negative, anaerobic, phototroph bacteria from the genus of rhodopseudomonas with a polar flagella which was isolated from chicken faeces. rhodopseudomonas faecalis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: rhodopseudomonas species: r. faecalis binomial name rhodopseudomonas faecaliszhang et al. 2002