The exact placement of early haplorhine families is uncertain owing to limited evidence. The following sets out a possible order put together by Williams, Kay and Kirk in 2010, based on cladograms put together by Seiffert et al (2005), Marivaux (2006) and Bajpai et al (2008), and should not be seen as definitive. They do not include Propliopithecoidea as they classify them as early catarrhines. Also included are Archicebidae, the discovery of which was announced by Ni et al in 2013. (but see notes below regarding placement).