Final answer:
Ardipithecus and Australopithecus are hominin species in the human evolutionary lineage, not apes. They are characterized by bipedal locomotion and possess morphological traits that show evolutionary changes towards modern humans.
Step-by-step explanation:
The term "pith" meaning "ape" is not applicable to fossil creatures like Ardipithecus and Australopithecus. These are hominin species that belong to the human evolutionary lineage.
Ardipithecus existed about 4.4 million years ago and is considered one of the earliest hominids. Australopithecus, which evolved around four million years ago, is known as the "southern ape" and is of particular interest as it is thought to be a potential ancestor to our genus, Homo.
Both Ardipithecus and Australopithecus are characterized by bipedal locomotion and possess morphological traits that provide evidence of evolutionary changes towards modern humans.