International Commission on Zoological Nomenclature

Article 17. Names found to denote more than one taxon, or taxa of hybrid origin, or based on parts or stages of animals or on unusual specimens. The availability of a name is not affected even if

17.1. it is found that the original description or name-bearing type specimen(s) relates to more than one taxon, or to parts of animals belonging to more than one taxon; or

17.2. it is applied to a taxon known, or later found, to be of hybrid origin (see also Article 23.8); or

17.3. it is based on only part of an animal, or one sex, or one stage in the life cycle, or one of several dissimilar generations, or one morph or caste of a polymorphic species, or a parthenogenetic form, or a specimen which is an unusual example of the taxon (for exclusions see Articles 1.3 and 45.6).