Casuariidae Casuariidae 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, though the extinct potential member "Hypselornis" was native to India. The characteristics of the family are those of its members. The fossil record of casuariforms is interesting, but not very extensive. Some Australian fossils initially believed to be from emus were recognized to represent a distinct genus, "Emuarius", which had a cassowary-like skull and femur and an emu-like lower leg and foot. A Pliocene Indian ratite, "Hypselornis", has
The Birds of Australia (Mathews) has stressed largely the nomenclatural aspect, a phase of ornithology which received little attention from John Gould in the eight folio volumes of his highly valued work, "The Birds of Australia". Gould seldom listed a date, and therefore he failed to recognize occasionally that another name listed by him was really older than the name used by him. He was a firm believer in the use of the prior name; this he showed by changing when necessary to an older name. These two great ornithological works which have the same title, and of which Australians are justly proud are thus