Genus Megamonas should be placed in the lineage of Firmicutes; Clostridia; Clostridiales; 'Acidaminococcaceae'; Megamonas

Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi, Tokyo 186-8650, Japan Correspondence Masami Morotomi masami-morotomi{at}yakult.co.jp Megamonas hypermegale is the sole species of the genus Megamonas included in the List of Prokaryotic Names with Standing in Nomenclature and in the databases of DDBJ, EBI/EMBL and NCBI/GenBank it is placed in the lineage of Bacteroidetes ; Bacteroidetes (class); ‘ Bacteroidales ’; Bacteroidaceae ; Megamonas . Phylogenetic analysis based on comparative 16S rRNA gene sequencing showed that this species clustered with species of the family ‘ Acidaminococcaceae ’ but not with those of the Bacteroidaceae . The genus Megamonas should be placed in the lineage of Firmicutes ; Clostridia ; Clostridiales ; ‘ Acidaminococcaceae ’; Megamonas .