A press release on the findings from a dig in the Bighorn Basin of Wyoming reports the finding of a series of extinct primate fossils that may be a link between plesiadapiforms and later primates due to an opposable big toe.The find is likely

Question

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The feature of an opposable big toe is characteristic of Carpolestes, which is believed to be an early, transitional form between plesiadapiforms and later primates. Notharctus, Apidium, and Eosimias are all later and more fully-developed primate species, making B the best choice.

A Press Release on the Findings from a Dig in the Bighorn