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Concept information

Preferred term



  • A particular case of anoplonym: published but nomenclaturally unavailable nomen according to the Code, for missing a diagnosis or description, and in some cases an onomatophore. (Dubois 2000)


  • nomen nudum


  • Etymology: G: γυμνός (gymnos), naked - ὄνομα (onoma), name.

Scope note(s)

  • Code: (Hawksworth 2010) Nomen nudum: A name published before 1931, which fails to conform to the Code, or if published before 1930 fails to conform to other provisions of the Code; such a naked name is not an available name, and therefore the same name may be made available later for the same or a different concept; in such a case it would take the authors name and date from that act of establishment, not from any publication where it was a nomen nudum.

Bibliographic citation(s)

  • Dubois, A. (2000) Synonymies and related lists in zoology: general proposals, with examples in herpetology. Dumerilia, 4 (2): 33–98.
  • Hawksworth, D. L. (2010) Terms used in bionomenclature: the naming of organisms (and plant communities). Global Biodiversity Information Facility (GBIF) Copenhagen. 1–216. [ ]


  • 223

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