Insulacebus is an extinct monotypic genus of New World monkey found on the island of Hispaniola from Late Quaternary deposits. Fossils of the type species Insulacebus toussaintiana have been recovered from the Plain of Formon, Department du Sud, southwestern Haiti. The body mass of the monkey was estimated between . The dentally primitive I. toussaintiana was likely derived from a fauna that was evolving on the mainland before the Miocene monkey bed of the Honda Group of central Colombia, and stems from a pre-Middle Miocene colonization from the South American mainland. See also Fossil primates of Central and South America and the Caribbean Hispaniola monkey of the Dominican Republic Jamaican monkey of Jamaica Paralouatta of Cuba References Night monkeys Prehistoric monkeys Holocene extinctions Monotypic prehistoric primate genera Prehistoric primate genera Prehistoric mammals of North America Endemic fauna of Hispaniola Extinct animals of Haiti Mammals of Haiti Mammals of Hispaniola Fossil taxa described in 2011