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 Bacillotaᵀ Gibbons and Murray 2021
                 Class Negativicutes Marchandin et al. 2010
                   Order Veillonellales Campbell et al. 2015 [monotypic]
                     Family Veillonellaceaeᵀ Rogosa 1971 (Approved Lists 1980)
                       Genus Veillonellaᵀ Prévot 1933 (Approved Lists 1980)
                         1 Veillonella caviae Mays et al. 1982
                         2 Veillonella denticariosi Byun et al. 2007
                         3 Veillonella magna Kraatz and Taras 2008
                         4 Veillonella montpellierensis Jumas-Bilak et al. 2004
                         5.1 Veillonella atypica (Rogosa 1965) Mays et al. 1982
                         5.2 Veillonella criceti (Rogosa 1965) Mays et al. 1982
                         5.3 Veillonella dispar (Rogosa 1965) Mays et al. 1982
                         5.4 Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980)
                         5.5 Veillonella ratti (Rogosa 1965) Mays et al. 1982
                         5.6 Veillonella rodentium (Rogosa 1965) Mays et al. 1982
                         6 Veillonella rogosae Arif et al. 2008