Assertion: squirrel monkey's group | /r/MadeOf | s. ustus
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Source sentences:
text: Squirrel monkeys are now divided into two groups, the Saimiri sciureus group, containing S. oerstedti subspecies, S. sciureus subspecies, and S. ustus and the Saimiri boliviensis group, containing S. boliviensis subspecies and S. vanzolinii.