"Proactinomyces gedanensis var. necrogenes" Krasil'nikov 1949 Dataset NCBI Taxonomy Classification phylum Fusobacteriota class Fusobacteriia order Fusobacteriales family Fusobacteriaceae genus Fusobacterium species Fusobacterium necrogenes Name Homonyms "Proactinomyces gedanensis var. necrogenes" Krasil'nikov 1949