 The most parsimonious explanation for this is that all lemurs are derived from a single ancestor that rafted from Africa to Madagascar during the Paleogene.Similarities in dentition between aye-ayes and several African primate fossils ("Plesiopithecus" and "Propotto") have led to the alternate theory that the ancestors of aye-ayes colonized Madagascar separately from other lemurs.In 2008, Russell Mittermeier, Colin Groves, and others ignored addressing higher-level taxonomy by defining lemurs as monophyletic and containing five living families, including Daubentoniidae.