Nocardia calcarea Metcalf and Brown 1957 (Approved Lists 1980) Dataset NCBI Taxonomy Classification phylum Actinomycetota class Actinomycetes order Mycobacteriales family Nocardiaceae genus Rhodococcus species Rhodococcus erythropolis Name Homonyms Nocardia calcarea Nocardia calcarea Metcalf and Brown 1957 (Approved Lists 1980)