[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   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 "Bacilli" "Garrity and Holt 2001" nom. nud. see Class Bacilli Ludwig et al. 2010
         Order "Lactobacillales" "Garrity and Holt 2001" nom. nud. see Order Lactobacillales Ludwig et al. 2010
           Family Streptococcaceae Deibel and Seeley 1974 (Approved Lists 1980)
             Genus Lactococcus Schleifer et al. 1986
               1 [Lactococcus lactis] (Lister 1873) Schleifer et al. 1986
               2 Lactococcus garvieae (Collins et al. 1984) Schleifer et al. 1986
               3 Lactococcus piscium Williams et al. 1990
               4 Lactococcus plantarum (Collins et al. 1984) Schleifer et al. 1986
               5 Lactococcus raffinolactis (Orla-Jensen and Hansen 1932) Schleifer et al. 1988