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The Strepsirrhini clade is one of the two suborders of primates, with 114 species. They are defined by their wet noses, although the Greek name means having a curved or bent nose. Madagascar's only primates (apart from humans) are strepsirrhines, although others can be found in southeast Asia.Their eyes have a reflective layer to improve their night vision, and their eye sockets have a ring of bone around the eye. Strepsirrhine primates produce their own vitamin C, whereas haplorhine primates (and ourselves) must get it from their diets.

The suborder contains the lemurs and lorises. The modern types probably evolved from the Adapiforms, an extinct group.