The earliest australopith that dates to ca. 4.2 to 3.9 millions of years ago (ma) is

The most punctual proof of Australopithecus backpedals to ca 4.2 Mama with the principal recorded appearance of Australopithecus 'anamensis' at Kanapoi, Kenya. Australopithecus afarensis is all around recorded in the vicinity of 3.6 and 3.0 Mama primarily from stores at Laetoli (Tanzania) and Hadar (Ethiopia). The phylogenetic relationship of these two 'species' is conjectured as ancestor - relative. Be that as it may, the absence of fossil proof from the time in the vicinity of 3.6 and 3.9.