prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval. Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024 Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021 Class Betaproteobacteria Garrity et al. 2006 Order Sulfuricellales Watanabe et al. 2015 [monotypic] see Order Spirillales Prévot 1940 (Approved Lists 1980) 1 Family Sulfuricellaceae Watanabe et al. 2015