geminicoccus geminicoccus geminicoccus is a gram-negative, and´strictly aerobic genus of bacteria from the family of geminicoccaceae with one known species (geminicoccus roseus). geminicoccus roseus has been isolated from a biofilter from rehovot in israel. geminicoccus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodospirillales family: geminicoccaceae genus: geminicoccusfoesel et al. 2008 type species geminicoccus roseus species g. roseus