Your classmate, whose part-time job entails reorganizing the paleoanthropology lab on campus, asks you to take a look at a skeleton that she thinks is that of a primate. after noting the absence of a postorbital bar, nails, and an opposable thumb, you tell her that

You tell her that "she should label this skeleton as a plesiadapiform rather than as a primate."

Plesiadapiforms were in all probability not primates, as prove by their distinctive skeletal life structures, for example, the absence of level nails, opposable digits, and a postorbital bar in the skull.