Later authorities disagreed .
Later authorities propose that the viverravids arose in North America 65 - 60 million years ago , spread to Asia then later to Europe , and were the first carnivorans and possessed the first true pair of carnassial teeth .
Later authorities disagreed , and propose that the viverravids arose in North America 65 - 60 million years ago , spread to Asia then later to Europe , and were the first carnivorans and possessed the first true pair of carnassial teeth .