The Madidi titi, or the golden palace monkey (Callicebus aureipalatii, "aureipalatii" meaning "of the Golden Palace"), is a titi, a kind of New World monkey, discovered in western Bolivia's Madidi National Park in 2004.
The species was discovered in low-lying lands of northwestern Bolivia, in the forest at the foot of the Andes. Studies indicate that it inhabits the western bank of the river Beni. The extension to the east and north of its range is not known. Preliminary studies indicate that the species is not endemic to Bolivia, with habitats that may extend to the south of Peru (at least to the Tambopata River).
The Madidi titi has orange-brown fur, a characteristic golden crown, a white tip to its tail, and dark red hands and feet. Like other titis, it is monogamous, mating for life. A pair maintains a territory against rival pairs primarily through territorial calling. The male usually carries the infants until they can survive on their own.
British biologist Robert Wallace of the Wildlife Conservation Society and the Bolivian biologist Humberto Gómez first spotted the monkey in 2000 when they were studying the animals of Madidi National Park. It became the first primate species to have been discovered in Bolivia in the last 60 years when it was given status as a new species in 2004 after years of studies. The field expedition team, consisting of Annika M. Felton, Adam Felton, and Ernesto Cáceres, were the first researchers to film and record this species, previously unknown to science. Rather than choosing a name themselves, Wallace, his team, and WCS auctioned off the naming rights to raise funds for FUNDESNAP (Fundación para el Desarrollo del Sistema Nacional de Áreas Protegidas), the nonprofit organization that maintains Madidi National Park. The online casino GoldenPalace.com, one of over a dozen bidders, paid US$650,000 to have the species named after them.
- Wallace, R. B., de la Torre, S. & Veiga, L. M. (2008). Callicebus aureipalatii. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 3 January 2009.
- "Madidi Titi Monkey". Wildlife Conservation Society. Retrieved 16 November 2011.
- Henry Fountain (8 February 2005). "Have Your Very Own Species, for a Price". The New York Times. Retrieved 16 November 2011.
- Ricardo Herrera Farell (May 2005). "BOL-71: El Aureipalatii: Bautizaron al Callicebus del Madidi" (in Spanish). Biodiversity Reporting Award. Retrieved 15 November 2011.
- Wallace, Robert B.; Gómez, Humberto; Felton, Annika; Felton, Adam M. (2006). "On a New Species of Titi Monkey, Genus Callicebus Thomas (Primates, Pitheciidae), from Western Bolivia with Preliminary Notes on Distribution and Abundance" (PDF). Primate Conservation 20: 36. doi:10.1896/0898-6220.127.116.11.
- "Internet casino buys monkey naming rights". MSNBC. Retrieved 16 November 2011.