"Streptococcus lactis B" Ayers et al. 1924 Dataset NCBI Taxonomy Classification phylum Bacillota class Bacilli order Lactobacillales family Streptococcaceae genus Lactococcus species Lactococcus cremoris Name Homonyms Streptococcus lactis B "Streptococcus lactis B" Ayers et al. 1924 Streptococcus lactis (Lister 1873) Lohnis 1909 (Approved Lists 1980)