Overview
The bonobo or pygmy chimpanzee, the other closest living relative of humans. Diverged from common chimpanzees approximately 2 MYA. Notable for a more gracile build, matriarchal social structure, prominent use of sexual behavior for social bonding, and relatively less aggressive intergroup interactions compared to common chimpanzees. Provides an important alternative model for the social behavior of the last common ancestor.
Brain Anatomy
No Cranial Data Available
No cranial remains or endocasts have been recovered for this species, so brain morphology cannot be directly assessed.
Tools & Technology
No Tool Associations
No stone tools have been directly associated with this species in the archaeological record.
Diet
Frugivorous; also consumes leaves, herbs, and small animals
Genetics & Ancient DNA
| Genome Coverage | 99.00% |
|---|---|
| DNA Source | Complete genome |
| Sequencing Year | |
| mtDNA Available | Yes |
| Nuclear DNA | Yes |
| Divergence Date (molecular clock) | 1.80 MYA (95% CI: 1.30–2.40; 12 studies) |
Molecular clock data from TimeTree 5 (Kumar et al. 2022).
Life History
| Estimated Lifespan | ~45 years |
|---|---|
| Age at Maturity | ~13.5 years |
| Weaning Age | ~4.5 years |
| Interbirth Interval | ~5.0 years |
| Gestation | ~8.0 months |
| Dental Development | Similar to P. troglodytes |
| Brain Growth | Bonobo developmental plasticity |
| Growth Comparison | Slightly slower than chimps in some milestones |
| Confidence | Measured |
Comparative Anatomy
| Encephalization Quotient | 2.45 |
|---|---|
| Intermembral Index | 105.0 |
| Locomotion | Facultative biped |
| Foramen Magnum | Posterior |
| Precision Grip | Rudimentary |
| Pelvic Shape | Tall narrow |
| Robusticity | Gracile |
| Big Toe | Abducted |
| Thorax | Funnel shaped |
Pan paniscus: longer legs vs chimps; similar EQ band.
DNA Data
Mitochondrial / Genomic Sequences
| Accession | Type | Length (bp) | Organism |
|---|---|---|---|
| NC_001644 | Complete mitogenome | 16,563 | Pan paniscus |