Final answer:
The statement that Don Johanson discovered Australopithecus robustus is incorrect. He is renowned for discovering the Australopithecus afarensis species, which includes the celebrated Lucy skeleton, not the robust australopithecine A. robustus.
Step-by-step explanation:
Don Johanson is not known as the discoverer of Australopithecus robustus. Instead, Don Johanson is famous for discovering the fossilized remains of Australopithecus afarensis, which is the species to which the famous skeleton named Lucy belongs. The skeleton of Lucy was uncovered during an expedition in Ethiopia in 1974, and represented a significant find in the study of early human ancestors. Australopithecus robustus, on the other hand, is classified under the genus Paranthropus and is one of the robust australopithecines. Therefore, the statement regarding Johanson's discovery of Australopithecus robustus is False.