Kingdom : Bacteria
Division : Firmicutes
Class : Bacilli
Order : Lactobacillales
Family : Streptococcaceae
Genus : Lactococcus
Lactococcus Schleifer et al. 1986, gen. nov.
Type species: Lactococcus lactis (Lister 1873) Schleifer et al. 1986.
Etymology: L. n. lac lactis, milk; N.L. masc. n. coccus (from Gr. masc. n. kokkos, grain, seed), coccus; N.L. masc. n. Lactococcus, milk coccus.
Valid publication: Validation List no. 20. Int. J. Syst. Bacteriol., 1986, 36, 354-356.
Effective publication: SCHLEIFER (K.H.), KRAUS (J.), DVORAK (C.), KILPPER-BÄLZ (R.), COLLINS (M.D.) and FISCHER (W.): Transfer of Streptococcus lactis and related streptococci to the genus Lactococcus gen. nov. Syst. Appl. Microbiol., 1985, 6, 183-195.
Refrence : http://www.bacterio.net/