(Rickettsiales) (Rickettsiales) is a biological order of the phylum Proteobacteria and class Alphaproteobacteria.
Anaplasmataceae
Holosporaceae
Rickettsiaceae
Caulobacterales
Kiloniellales
Kordiimonadales
Parvularculales
Rhizobiales
Rhodobacterales
Rhodospirillales
Rickettsiales
Sneathiellales
Sphingomonadales