After McKenna & Bell, 1997

<==o †Plagiomenidae
   |?- ?†Eudaemonema cuspinata
   |?-o ?†Elpidophorus Simpson, 1927
   |  |-- †E. elegans Simpson, 1927
   |  `-- †E. minor
   |--o †Plagiomeninae
   |  |--o †Worlandiini
   |  |  |-- †Planetetherium mirabile
   |  |  `-- †Worlandia inusitata Bown & Rose, 1979
   |  `--o †Plagiomenini
   |     |-- †Ellesmene eureka
   |     `--o †Plagiomene
   |        |-- †P. accola
   |        `-- †P. multicuspis
   `?-o †Ekgmowechashalinae
      |?- †Ekgmowechashala philotae MacDonald, 1963 [Ekgmowechashalini] [Often treated as an omomyid primate.]
      `?-o †Tarkadectini [Recently treated as omomyid primates]
         |-- †Tarkadectes montanensis
         `-- †Tarka stylifera

Reference(s):