procaryotes Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024 Phylum Firmicutes (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021 Class Mollicutes Edward and Freundt 1967 (Approved Lists 1980) Order Anaeroplasmatales Robinson and Freundt 1987 [monotypic] Family Anaeroplasmataceae Robinson and Freundt 1987 Genus Anaeroplasma Robinson et al. 1975 (Approved Lists 1980)