In his original 1816 description of the emu, Vieillot used two generic names; first Dromiceius, then Dromaius a few pages later. It has been a point of contention ever since which is correct; the latter is more correctly formed, but the convention in taxonomy is that the first name given stands, unless it is clearly a typographical error. Most modern publications, including those of the Australian government, use Dromaius, with Dromiceius mentioned as an alternative spelling. However, the Dromiceius spelling was used by Russell in his 1972 naming of the dinosaur Dromiceiomimus.
There is one prehistoric species of Emu, Dromaius ocypus (A.H. Miller, 1963), described from Late Pliocene fossils (Mampuwordu Sands Formation, Lake Palankarinna, Australia) accepted as distinct nowadays. A number of other Emu fossils from Australia described as separate species are now regarded as chronosubspecies at best, given the considerable variation even between living individuals.. There are also some unidentifiable remains of emu-like birds from rocks as old as the middle Miocene.
J Zoo Wildl Med.: use of thiafentanil - medetomidine for the induction of anesthesia in emus (Dromaius novaehollandiae) within a wild animal park.(Reprint)(Report)(Brief article)
Sep 01, 2010; Fifteen adult emu (Drornaius novaehollandiae) anesthetic events were successfully undertaken with the use of thiafentanil oxalate...