Transfer of Peptostreptococcus elsdenii Gutierrez et al. to a New Genus, Megasphaera [M. elsdenii (Gutierrez et al.) comb. nov.]

Peptostreptococcus elsdenii Gutierrez et al. 1959 does not have the characteristics of the genus Peptostreptococcus Kluyver and van Niel. The organism appears to be unique and is here relegated to a new genus, Megasphaera. The type species is Megasphaera elsdenii (Gutierrez et al.) comb. nov., of which the type strain is LC1 (= ATCC 25940 = NCIB 8927). The placement of this genus in a family will be done in a future publication.