Article 46. Principle of Coordination
A name established for a taxon at either rank in the species group is deemed to have been simultaneously established by the same author for a taxon at the other rank in the group; both nominal taxa have the same name-bearing type, whether that type was fixed originally or subsequently.
When a nominal taxon is raised or lowered in rank in the species group its name-bearing type [Art. 72.1.2] remains the same [Art. 61.2.2] whether the name-bearing type was fixed originally or subsequently.