SUMMARY: A group of 62 strains, mostly members of the genera and , has been subjected to a numerical-taxonomic analysis. All 57 characters have been scored according to the scale 0 to 5 and an appropriate formula has been used for the calculation of similarity. The method of clustering of organisms applied here is a modification of the original ‘single-linkage method’. Eleven 85-phenons were found and the rank of species has been attributed to them. On the basis of existing taxonomic studies it appears probable that aerobic sarcinas must be considered as members of the genus and that they are R-dissociated forms of proteolytic micrococci.


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