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Phylogenetic analysis of Ruminococcus flavefaciens, the type species of the genus Ruminococcus, does not support the reclassification of Streptococcus hansenii and Peptostreptococcus productus as ruminococci.
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Anaerobic cocci from the bovine alimentary tract, the amino acids of their cell wall peptidoglycans and those of various species of anaerobic Streptococcus.