"Peptostreptococcus elsdenii" Gutierrez et al. 1959 Dataset NCBI Taxonomy Classification phylum Bacillota class Negativicutes order Veillonellales family Veillonellaceae genus Megasphaera species Megasphaera elsdenii Name Homonyms Peptostreptococcus elsdenii "Peptostreptococcus elsdenii" Gutierrez et al. 1959