Established clade names are those that are published in accordance with Article 7 of this code. In order to indicate which clade names are established under this code and therefore have explicit phylogenetic definitions, it may be desirable to distinguish these names from supraspecific names governed by the rank-based codes, particularly when both are used in the same publication. Preexisting names are scientific names that prior to their establishment under this code were either: “legitimate”, “potentially valid”, or “valid”; or in use but whose application to taxa is not governed by any code. A name may be submitted to the database prior to acceptance for publication, but it is given only a temporary registration number at that time. Registration of a name whose spelling or definition is identical to one that already exists in the database should generally be avoided.