“…Such data are of paramount value to interpret the mandibular hominoid fossil record (White and Johanson, 1982;Chamberlain and Wood, 1985;Lockwood et al, 1996;White et al, 2000;Fabbri, 2006;Skinner et al, 2006;Lague et al, 2008;Haile-Selassie et al, 2015Ioannidou et al, 2022). Despite a rich fossil record (Freedman, 1957;Delson, 1973;Leakey, 1982;Benefit and Pickford, 1986;De Bonis et al, 1990;Frost and Delson, 2002;Leakey et al, 2003;Hlusko, 2006Hlusko, , 2007Jablonski and Leakey, 2008;Jablonski et al, 2008aJablonski et al, , 2008bNakatsukasa et al, 2010;Pallas, 2019;Gommery et al, 2022) and the great taxonomic and functional diversity of its extant representatives (Groves and Kingdon, 2013;Rowe and Jacobs, 2016a), a thorough examination of the corpus shape of extant Old World Monkeys (Cercopithecidae) on a large taxonomic scale is lacking, preventing the extrapolation of any taxonomical and ecomorphological considerations in extant and fossil representatives of this group.…”