This appendix has been included to provide readers with basic information on the collections of fossil specimens of Theropithecus that exist throughout the world. The lists of fossil specimens included here represent all the sites that have yielded Theropithecus fossils. The list of specimens from Ternifine represents the only published complete catalogue for Theropithecus at that site, while the remaining lists include only those fossils that could be confidently assigned to a species and that were reasonably complete. This meant the exclusion of small fragments of postcrania and mandibles from several East African sites and the exclusion of a very large collection of isolated teeth and tooth fragments from the Omo Basin. Details on specimens of Theropithecus from Kanjera and Olduvai that are housed in the Division of Palaeontology, National Museums of Kenya are provided here, but readers should note that most of the fossils from Kanjera and some from Olduvai are housed in the British Museum (Natural History) and that details of this collection have already been published in Napier (1981).

The lists of fossil specimens are arranged firstly according to site and then by species. At the beginning of each site entry, a short description of the age of the fossiliferous sediments is provided. Information on specimens from the various localities was provided by direct contributions from Eric Delson (ED), Gerald Eck (GE), and Meave Leakey (ML).