Article 56. Genus-group names

56.1. Application of the Principle of Homonymy

The Principle of Homonymy applies to all genus-group names, including names of collective groups and of ichnotaxa at the genus-group level [Arts. 1.2, 23.7, 42.2].

56.2. One-letter difference

Even if the difference between two genus-group names is only one letter, they are not homonyms.

^{Example. Two generic names in Diptera, Microchaetina van der Wulp, 1891 and Microchaetona Townsend, 1919, are not homonyms.}

56.3. Precedence of genus over subgenus

Of two homonymous genus-group names of identical date, one established for a genus and the other for a subgenus, the former takes precedence over the other [Art. 24.1].