Cercamoniinae

…other adapiforms, the widely distributed Cercamoniinae are enigmatic, to the extent that they may not be a natural or monophyletic group, because all the descendants of their common ancestor may not be known at present. Their evolutionary relationships remain unclear; some paleontologists have proposed, however, that cercamoniines are closely related…

…in North America, whereas the cercamoniines were distributed across parts of Africa, Europe, and possibly even Asia, in addition to North America. Most adapiform lineages went extinct when the global climate became cooler and drier near the Eocene-Oligocene boundary (approximately 34 million years ago), but the sivaladapids survived in southern…