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 Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024 Phylum Mycoplasmatota Murray 2021 [monotypic] Class Mollicutes Edward and Freundt 1967 (Approved Lists 1980) Order Mycoplasmatales Freundt 1955 (Approved Lists 1980) Family Spiroplasmataceae (ex Skripal' 1974) Skripal' 1983 [monotypic] Genus Spiroplasmaᵀ Saglio et al. 1973 (Approved Lists 1980) Spiroplasma leucomae Oduori et al. 2005