The hominid that is described is <em>Australopithecus africanus</em>.
<em>Australopithecus africanus</em> is one of the extinct hominids. It lived approximately from between 3.2 to 2.1 million years ago, in the late Pliocene and early Pleistocene. It is a species that lived in Africa, but its total range is not well known as there is only four fossils from it found, all in the same region, in the southern part of Africa.
The <em>Australopithecus africanus</em> is thought to be the ancestor of the later <em>Homo habilis</em>, and it is also considered to be a direct ancestor of the modern <em>Homo</em> <em>sapiens</em>, though that is still debatable.
The stomach lining contains glands that produce stomach acid and enzyme.
Because its a gas and its always changing forms. hope this helped