 Microwear patterns on the cheek teeth of "A. afarensis" and "A. anamensis" indicate that "A. afarensis" predominantly ate fruits and leaves, whereas "A. anamensis" included grasses and seeds (in addition to fruits and leaves).The thickening of enamel in australopiths may have been a response to eating more ground-bound foods such as tubers, nuts, and cereal grains with gritty dirt and other small particulates which would wear away enamel.Gracile australopiths had larger incisors, which indicates tearing food was important, perhaps eating scavenged meat.