pontibaca pontibaca pontibaca is a gram-negative genus of bacteria from the family of rhodobacteraceae with one known species (pontibaca methylaminivorans). pontibaca methylaminivorans has been isolated from coastal sediments from the sea of japan. pontibaca scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: pontibacakim et al. 2010 type species pontibaca methylaminivorans species p. methylaminivorans