Phylum
Proteobacteria
Proteobacteria
440 species in this taxon
phylum of Gram-negative bacteria Proteobacteria (Proteobacteria) is a phylum containing organisms that share fundamental body plan characteristics. It contains 2 classs with 440 known species. This includes the class groups Alphaproteobacteria, and Gammaproteobacteria. It belongs to Bacteria (Bacteria).