A glossary of frequently debated terms
/\ Please keep the list in alphabetic order
The basionym of a later name is the epithet-bringing name (first name ever validly published given to the same infrageneric taxon, the epithet of which is the same as in the later name originated through a reclassification). According to the International Code of Botanical Nomenclature the author(-team) of the basionym must be mentioned in the later name (by placing it in parentheses before the authority of the new combination).
An ex-author(-team) is an author(-team) to whom a taxon name was ascribed although it is not the author(-team) of a valid publication (for instance without the validating description or diagnosis in case of a name for a new taxon). This ascribed authorship, followed by "ex", may be inserted before the name(s) of the publishing author(s) of the validly published name.
"Lilium tianschanicum was described by Grubov (1977) as a new species and its name was ascribed to Ivanova; since there is no indication that Ivanova provided the validating description, the name may be cited as L. tianschanicum N. A. Ivanova ex Grubov or L. tianschanicum Grubov." (International Code of Botanical Nomenclature -Saint Louis Code-)
The replaced synonym of a later name is the first name ever validly published given to the same infrageneric taxon, the epithet of which could not be used in the later name originated through a reclassification. A new epithet must be proposed if the use of the original epithet leads to an already existing name (for another taxon) or in botany to autonyms (since the International Code of Botanical Nomenclature does not allow such names where epithet and genus name are the same).