What is Lactobacillus Phylum? The Lactobacillus Phylum includes the species L. acidophilus and L. gasseri. This phylum consists of two major groups: L. acidophilus (a homo-flora) and L. gasseri (a hetero-flora). The bacteria in this phylum are primarily found in the gut microbiome. Lactobacilli species include Lactobacillus acidophilus and Lactobacillus reuteri, often found in yogurt […]