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. 2024 Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024 Phylum Pseudomonadotaᵀ Garrity et al. 2021 Class Alphaproteobacteria Garrity et al. 2006 Order Caulobacteralesᵀ Henrici and Johnson 1935 (Approved Lists 1980) Family Caulobacteraceaeᵀ Henrici and Johnson 1935 (Approved Lists 1980) Genus Caulobacterᵀ Henrici and Johnson 1935 (Approved Lists 1980) [polyphyletic] [Caulobacter crescentus Poindexter 1964 (Approved Lists 1980)] see Caulobacter vibrioides Henrici and Johnson 1935 (Approved Lists 1980)