Abstract
The Phorusrhacidae, a group of large terrestrial carnivorous birds mostly known from the Cenozoic of South America, are often placed in a superfamily, for which the taxon name Phororhacoidea Patterson, 1941 is frequently used. However, according to the International Code of Zoological Nomenclature, Phororhacoidea is not valid. The proper taxon name at the superfamily level is Phorusrhacoidea Ameghino, 1889.
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