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 Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Negativicutes Marchandin et al. 2010 [monotypic]
                   Order Veillonellales Campbell et al. 2015 [monotypic]
                     Family Veillonellaceaeᵀ Rogosa 1971 (Approved Lists 1980)
                       Genus Veillonellaᵀ Prévot 1933 (Approved Lists 1980)
                         Veillonella atypica (Rogosa 1965) Mays et al. 1982
                         Veillonella caviae Mays et al. 1982
                         Veillonella criceti (Rogosa 1965) Mays et al. 1982
                         Veillonella denticariosi Byun et al. 2007
                         Veillonella dispar (Rogosa 1965) Mays et al. 1982
                         Veillonella magna Kraatz and Taras 2008
                         Veillonella montpellierensis Jumas-Bilak et al. 2004
                         Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980)
                         Veillonella ratti (Rogosa 1965) Mays et al. 1982
                         Veillonella rodentium (Rogosa 1965) Mays et al. 1982
                         Veillonella rogosae Arif et al. 2008