ACETIVIBRIO CELLULOLYTICUS AND BACTEROIDES CELLULOSOLVENS ARE MEMBERSOF THE GREATER CLOSTRIDIAL ASSEMBLAGE

The nucleotide sequences of the 16S rRNA genes of Acetivibrio cellulol yticus, A. cellulosolvens, and Bacteroides cellulosolvens were determi ned and shown to be affiliated with the low G+C members of Gram-positi ve bacteria. The sequences for A. cellulolyticus and A. cellulosolvens were revealed to be identical, supporting the proposal by W.D. Murray [Int. J. Syst. Bacteriol. (1986) 36, 314-316] that A. cellulosolvens be correctly classified as A. cellulolyticus. The closest relative to A. cellulolyticus is Clostridium aldrichii, related at 98.5% sequence similarity. B. cellulosolvens and A. cellulolyticus are related at 94. 4% sequence similarity.