"Actinomyces violaceus chromogenes" Krasil'nikov 1949 Dataset NCBI Taxonomy Classification phylum Actinomycetota class Actinomycetes order Kitasatosporales family Streptomycetaceae genus Streptomyces species Streptomyces violaceochromogenes Name Homonyms "Actinomyces violaceus chromogenes" Krasil'nikov 1949