The Gorilla:
The gorilla (Gorilla gorilla) is the largest living primate. The tropical forests they inhabit in sub-Saharan Africa, the western lowlands, the eastern lowlands, and the mountains, classify the three subspecies of the gorillas. The diet of the gorilla consists of leaves and pith, hence their very robust grinding molars. In contrast to the chimpanzee, the gorillas spend most of their time on the ground, especially for feeding and resting. Like the chimps, they move by quadrupedal walking and running, commonly called knuckle walking. The social groups consist of several females who are related and their offspring and one dominant male. Gorillas are very sexually dimorphic (males weighing over 200 kg and females being about 90 kg) and this is obvious in their anatomy. Compared to chimpanzees, the gorilla is considered very robust. The molar teeth are very large, their canines are huge and tusk like, but they have small incisors compared to the chimps. Other cranial differences are that their snouts are longer, they have larger browridges, and very large sagittal and nuchal crests are present.