Proteobacteria classis nov., a Name for the Phylogenetic Taxon That Includes the “Purple Bacteria and Their Relatives” Stackebrandt, E. and Murray, R. G. E. and Trüper, H. G.,, 38, 321-325 (1988), doi = https://doi.org/10.1099/00207713-38-3-321, publicationName = Microbiology Society, issn = 1466-5026, abstract= Proteobacteria classis nov. is suggested as the name for a new higher taxon to circumscribe the a, β, γ, and δ groups that are included among the phylogenetic relatives of the purple photosynthetic bacteria and as a suitable collective name for reference to that group. The group names (alpha, etc.) remain as vernacular terms at the level of subclass pending further studies and nomenclatural proposals., language=, type=