Setoguchi T
Folia Primatol (Basel). 1985;44(2):96-101. doi: 10.1159/000156200.
A new genus and species of fossil primate, Kondous laventicus, part of the Miocene La Venta primate fauna of Colombia, South America, is described here for the first time. Screening at a new quarry within the Monkey Unit of the Honda Formation, the Kyoto Site, has revealed dental remains of this new form of a large-sized ceboid. The La Ventan vertebrate fauna is comparable to the Friasian Land Mammal Age, indicating a middle Miocene age. Biostratigraphic studies suggest a 13.6-15.2 Ma for the Friasian faunal zone. Kondous is most closely allied to extant spider monkeys, Ateles, providing the first fossil evidence of their phylogeny. It also implies a nearly three-fold discrepancy between the molecular and paleontological estimates of the age of the Ateles lineage.
一种新的化石灵长类动物属和种——拉文蒂库斯孔杜斯（Kondous laventicus），首次在此被描述，它是南美洲哥伦比亚中新世拉文塔灵长类动物群的一部分。在本田组猴子单元的一个新采石场（京都遗址）进行筛选时，发现了这种大型卷尾猴新物种的牙齿化石。拉文塔脊椎动物群与弗里亚斯期陆地哺乳动物时代相当，表明其为中新世中期。生物地层学研究表明，弗里亚斯动物群带的年代为1360 - 1520万年前。孔杜斯与现存的蜘蛛猴（Ateles）关系最为密切，为其系统发育提供了首个化石证据。这也意味着蜘蛛猴谱系的分子估计年龄与古生物学估计年龄之间存在近三倍的差异。
