micropepsaceae micropepsaceae the micropepsaceae are a family of bacteria. micropepsaceae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria subclass: caulobacteridae order: micropepsalesharbison et al. 2017 family: micropepsaceaeharbison et al. 2017 genera micropepsis harbison et al. 2017 rhizomicrobium ueki et al. 2010