The bird family Casuariidae has four surviving members: the three species of cassowary and the emu.
All living members of the family are very large flightless birds native to Australia-New Guinea.Clements, J (2007)
Species † Emuarius Boles, 1992 (emuwaries) (Late Oligocene – Late Miocene) † E. gidju (Patterson & Rich 1987) Boles, 1992 † E. guljaruba Boles, 2001 Casuarius Brisson, 1760 (cassowary) † C. lydekkeri Rothschild, 1911 (Pygmy cassowary) C. casuarius (Linnaeus, 1758) (Southern cassowary) C. unappendiculatus Blyth, 1860 (Northern cassowary) C. bennetti Gould, 1857 (Dwarf Cassowary) C. b. westermanni (Sclater, 1874) (Papuan dwarf cassowary) C. b. bennetti Gould, 1857 (Bennett's cassowary) Dromaius Vieillot, 1816 (emu) †D. arleyekweke Yates & Worthy 2019 †D. ocypus Miller 1963 D. novaehollandiae (Latham, 1790) (Emu) †D. n. diemenensis Le Souef, 1907 (Tasmanian emu) †D. n. minor Spencer, 1906 (King Island emu) †D. n. baudinianus Parker, SA, 1984 (Kangaroo Island emu) D. n. novaehollandiae (Latham, 1790) (Emu)
Systematics and evolution
Some Australian fossils initially believed to be from emus were recognized to represent a distinct genus, Emuarius,From "Emu" + "Casuarius". Describer W. E. Boles commonly refers to the genus as "emuwaries" or "cassomus". which had a cassowary-like skull and femur and an emu-like lower leg and foot.
Footnotes
References Boles, Walter E. (2001): A new emu (Dromaiinae) from the Late Oligocene Etadunna Formation. Emu 101: 317–321. HTML abstract
Folch, A. (1992). Family Casuariidae (Cassowaries). pp. 90– 97 in; del Hoyo, J., Elliott, A. & Sargatal, J. eds. Handbook of the Birds of the World, Vol 1, Ostrich to Ducks. Lynx Edicions, Barcelona.