Gracile Australopithecines

A general term for Australopithecus afarensis and A africanus that have been so designated because of their lighter build, and differences in skull, teeth
References in periodicals archive ?
This cerebral radiator -- represented in fossils by grooves in cranial bones and openings for emissary veins -- expanded as brain size increased in gracile australopithecines and the Homo lineage, while small-brained Hadar hominids and robust australopithecines lacked the cooling network of veins.
Indeed, says Vrba, South African robust australopithecines may have occupied more arid, open stretches of savanna than did gracile australopithecines.
Both robust and gracile australopithecines lived in relatively open savanna regions, she adds.
africanus specimens, which Falk considers gracile australopithecines.