homotypic synonym, not validly published, basonym of name in Approved Lists
Clostridiumdifficile is the correct name if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Clostridium.
See Oren and Rupnik (2018) for details on the nomenclature of this species.Publication:
Oren A, Rupnik M. Clostridium difficile and Clostridioides difficile: Two validly published and correct names. Anaerobe 2018; 52:125-126.