Table 1 Ratio of Pongo to cercopithecoids and hylobatids at fossil sites (using number of individual craniodental specimens) and modern sites (using densities of individuals per square kilometers).

Complete data set and sources are provided in table S2.

Fossil sites (n = 14)*
(number of fossils)
Modern sites (n = 13)
(individuals/km2)
Mean across sites
Pongo182 ± 80.591.81 ± 0.32
Cercopithecoid218 ± 28.1947.94 ± 11.02
Hylobatid6 ± 2.838.75 ± 1.22
Ratios
Pongo: Cercopithecoid0.84 ± 5.230.04 ± 0.03
Pongo: Hylobatid30.33 ± 27.050.21 ± 0.06

*Only those fossil localities with n > 20 Pongo specimens were included to minimize sampling biases.

†Only presented for those sites for which counts or density estimates of both Presbytis and Macaca were available.