ABSTRACT
The nominal author(s) of a clade name is the person(s) who first published the name, regardless of whether it was phylogenetically defined and regardless of whether it was initially applied to a taxon that differed somewhat in composition from the clade for which the name is being converted. The nominal authors of a replacement name are the authors of that name, not the authors of the replaced name. However, because the definition remains the same, the definitional authors of the replacement name are the definitional authors of the replaced name. When the prevailing spelling of a preexisting name differs from the original spelling due to correction of orthographic or typographical errors in the original spelling or orthographic standardizations, whether imposed by a rank-based code or accepted by convention, the prevailing spelling is to be attributed to the author of the publication in which the original spelling was used.
