Nuciruptor rubricae

Nuciruptor rubricae is an extinct New World monkey from the Middle Miocene, in the Laventan age about 13.8 to 11.8 million years ago, and the type species of the genus Nuciruptor. A lower jaw was found in the El Cardón redbeds of the Cerro Colorado Member of the Villavieja Formation, Honda Group, in Colombia, just below the San Francisco Sandstone, which is dated to about 12.8 million years ago. The genus name comes from the Latin for nut and breaker, and the species name refers to the red beds. Like living pitheciins it had elongated, procumbent, styliform lower incisors and a mandible that deepens under the molars, but it lacked the gaps between incisors and canines of living forms and its premolars were not molarised. Its weight is estimated at 2,000 grams, and it is thought to be an ancestral saki, like Cebupithecia.