Erratum to: Primates DOI: 10.1007/s10329-008-0082-5

In the “Methods” section, the first sentence of the first paragraph should read:

A left upper limb of a female Sumatran orangutan (Pongo abelii) was obtained for dissection from Higashiyama Zoo and Botanical Gardens, Aichi, Japan, through the Great Ape Information Network (GAIN).