prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     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)
             1 Genus Lactococcus Schleifer et al. 1986
             2 Genus Lactovum Matthies et al. 2005
             3 Genus Streptococcus Rosenbach 1884 (Approved Lists 1980)