Original: Since Shaw first described the species , its name has undergone four revisions : from M. aculeata to Ornithorhynchus hystrix , Echidna hystrix , Echidna aculeata and , finally , Tachyglossus aculeatus .
Simplified: Memoirs of the Australian Museum 6 : i -- xii , 1 -- 122 : M. aculeata Ornithorhynchus hystrix Echidna hystrix , Echidna aculeata Tachyglossus aculeatus .