? megacephalus Fischer, 1814 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Chordata class Mammalia order Rodentia family Cricetidae genus Hylaeamys species Hylaeamys megacephalus Name Homonyms ? megacephalus Fischer, 1814 ? megacephalus Costa, 1864 ? megacephalus Stutchbury, 1846