Nine individual Alouatta caraya and Sapajus cay displaying facial malformations were observed across three sites in Paraguay. Six had cleft lip (with or without cleft palate), and three had malformations of the lower lip. This is the first record of cleft lip and/or palate in the genus Alouatta.

中文翻译：

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巴拉圭野生灵长类动物面部畸形，包括唇裂和腭裂

在巴拉圭的三个地点观察到九个个体Alouatta caraya和Sapajus cay显示面部畸形。6 例有唇裂（有或无腭裂），3 例有下唇畸形。这是Alouatta属中唇裂和/或腭裂的第一个记录。