Proconsul

Overview

Proconsul is one of the best-known early apes, living approximately 21 million years ago in the forests of East Africa. Unlike modern apes, Proconsul lacked many of the specialized features seen in living great apes — it had no tail, but also lacked the broad chest and shoulder adaptations for brachiation (arm-swinging) seen in modern apes. This makes Proconsul a fascinating 'transitional' form, displaying a combination of primitive and derived features that help paleontologists understand the early evolution of the ape body plan. Several species of Proconsul are known, ranging from cat-sized to chimpanzee-sized individuals. While Proconsul is not confirmed as a direct human ancestor, it sits near the base of the ape radiation that eventually gave rise to gibbons, orangutans, gorillas, chimpanzees, and humans.

Key Traits

• No tail — a key distinguishing feature of apes
• Flexible wrists and mobile limbs suited for above-branch locomotion
• Lacked the broad chest and wrist-locking adaptations of modern great apes
• Multiple species ranged from approximately 10 kg to over 50 kg in body mass
• Large brain relative to body size compared to earlier primates
• Frugivorous diet with large molar teeth for hard food processing

Habitat

Proconsul inhabited the tropical and subtropical forests of East Africa (primarily present-day Kenya and Uganda) during the early to middle Miocene. The African continent was drifting northward, and forests were widespread before later climate cooling reduced forest cover.

Diet

Largely frugivorous, but capable of consuming harder food items including seeds and fibrous vegetation based on its dental morphology.