Nomen nudum

In taxonomy (especially in zoological and botanical nomenclature), a nomen nudum ("naked name"; plural nomina nuda) is a designation[1] which looks exactly like a scientific name of an organism, and may have originally been intended to be a scientific name, but fails to be one because it has not (or has not yet) been published with an adequate description (or a reference to such a description). This makes it a "bare" or "naked" name, one which cannot be accepted as it stands.[2] A largely equivalent but much less frequently used term is nomen tantum ("name only").