A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae Author Zheng, Jinshui Author Wittouck, Stijn Author Salvetti, Elisa Author Franz, Charles M. A. P. Author Harris, Hugh M. B. Author Mattarelli, Paola Author O’Toole, Paul W. Author Pot, Bruno Author Vandamme, Peter Author Walter, Jens Author Watanabe, Koichi Author Wuyts, Sander Author Felis, Giovanna E. Author Gänzle, Michael G. Author Lebeer, Sarah text International Journal of Systematic and Evolutionary Microbiology 2020 2020-04-15 70 2782 2858 journal article 7136 10.1099/ijsem.0.004107 c650e745-85a1-48ca-b29a-b1714f644bae 4730536 Emended description of the family Lactobacillaceae Theemended family Lactobacillaceae iscircumscribed on the basisof phylogenomic analyses reportedin thepresent paper, and includes all the genera previously included in families Lactobacillaceae Winslow etal . 1917 (Approved Lists 1980) and Leuconostocaceae Schleifer 2010 , i.e. Convivina , Fructobacillus , Lactobacillus , Leuconostoc , Oenococcus , Paralactobacillus , Pediococcus and Weissella . Cells are Gram-positive, non-spore-forming facultative or strict anaerobic bacteria. Cells are coccoid or rod-shaped, which may form chains , pairs or tetrads (genus Pediococcus ). Main product of the fermentative metabolism is lactate, and other products may be acetate, ethanol, CO2, formate or succinate. Complex nutritional requirements for amino acids, peptides, nucleicacid derivatives, vitamins, salts, fattyacids or fatty acid esters, and fermentable carbohydrates. Lactobacillaceae are the only family in the Lactobacillales that includes homofermentative andheterofermentative micro-organisms. Type genus: Lactobacillus Beijerinck 1901 212 (Approved Lists).