[4] However, most experts now place Eosimians as stem simians - Williams, Kay and Kirk (2010) note this is because more and more evidence points in that direction.

In this tree, Eosimiidae as conventionally defined, shown as italic, is a paraphyletic, 'grade' or stem group in this assessment.

Paraphyletic groupings are problematic, as one can not talk precisely about their phylogenic relationships, their characteristic traits and literal extinction.

Alternatively, with Phileosimias and Amphipithecidae placed outside of an Eosimiidae sensu stricto taxon would restore monophyly.

Tarsiiformes Muangthanhinius (†32 Mya) Gatanthropus micros (†30) Bugtilemur (†29) Ekgmowechashala Eosimias (†40) Phenacopithecus (†42) Bahinia (†32) Nosmips aenigmaticus (†37) Phileosimias (†30) Amphipithecidae (†35) Parapithecoidea (†30) Proteopithecus sylviae (†34) Crown Simians (40)