Lemuroidea Lorisoidea[a] (See text) Lemuriformes is the sole extant infraorder of primate that falls under the suborder Strepsirrhini.

It includes the lemurs of Madagascar, as well as the galagos and lorisids of Africa and Asia, although a popular alternative taxonomy places the lorisoids in their own infraorder, Lorisiformes.

[a] Lemuriform primates are characterized by a toothcomb, a specialized set of teeth in the front, lower part of the mouth mostly used for combing fur during grooming.

American paleontologist Philip Gingerich proposed that lemuriform primates evolved from one of several genera of European adapids based on similarities between the front lower teeth of adapids and the toothcomb of extant lemuriforms; however, this view is not strongly supported due to a lack of clear transitional fossils.

[6][7] Scandentia (treeshrews) Dermoptera (colugos) †Plesiadapiformes Haplorhini (tarsiers, monkeys, and apes) †Adapiformes Lorisoids Lemurs Until discoveries of three 40-million-year-old fossil lorisoids (Karanisia, Saharagalago, and Wadilemur) in the El Fayum deposits of Egypt between 1997 and 2005, the oldest known lemuriforms had come from the early Miocene (~20 mya) of Kenya and Uganda.

[18] These three extinct families included the giant lemurs of Madagascar,[22] many of which died out within the last 1,000 years following human arrival on the island.