Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 1990 [paraphyletic?] Superphylum "Proteobacteria" Craig et al. 2010 Phylum "Betaproteobacteria" Garrity et al., 2006 [monotypic] Class Betaproteobacteriaᵀ Garrity et al. 2006 Order Burkholderiales Garrity et al. 2006 Genus Sphaerotilus Kützing 1833 (Approved Lists 1980), incertae sedis [monotypic] ["Sphaerotilus bovis" (C.O. Harz 1877-1878[1877]) Engler 1907] see Actinomyces bovis Harz 1877 (Approved Lists 1980)