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 Bacilli Ludwig et al. 2010
                   Order Lactobacillales Ludwig et al. 2010
                     Family Streptococcaceae Deibel and Seeley 1974 (Approved Lists 1980)
                       Genus Lactococcus Schleifer et al. 1986
                         1 Lactococcus chungangensis Cho et al. 2008
                         2 Lactococcus formosensis Chen et al. 2014
                         3 Lactococcus fujiensis Cai et al. 2011
                         4 Lactococcus garvieae (Collins et al. 1984) Schleifer et al. 1986
                         5 Lactococcus lactis (Lister 1873) Schleifer et al. 1986
                         6 Lactococcus piscium Williams et al. 1990
                         7 Lactococcus plantarum (Collins et al. 1984) Schleifer et al. 1986
                         8 Lactococcus raffinolactis (Orla-Jensen and Hansen 1932) Schleifer et al. 1988