Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] 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 parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980)
                           1 [Veillonella parvula subsp. atypica Rogosa 1965 (Approved Lists 1980)] see Veillonella atypica (Rogosa 1965) Mays et al. 1982
                           2 [Veillonella parvula subsp. parvulaᵀ (Veillon and Zuber 1898) Rogosa 1965 (Approved Lists 1980)] see Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980)
                           2.0 ["Veillonella parvula subsp. parvula"ᵀ Rogosa 1965 err. bibl.] see Veillonella parvula subsp. parvula (Veillon and Zuber 1898) Rogosa 1965 (Approved Lists 1980)
                           3 [Veillonella parvula subsp. rodentium Rogosa 1965 (Approved Lists 1980)] see Veillonella rodentium (Rogosa 1965) Mays et al. 1982