Mesembriornis studeri Moreno & Mercerat, 1891 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Aves order Gruiformes family Phororhacidae genus Phorusrhacos species Phorusrhacos longissimus Name Homonyms Mesembriornis studeri Moreno & Mercerat, 1891