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<==o †Actinoceratida Teichert, 1933 [nom. transl. Teichert, 1964 pro Actinoceroidea Teichert, 1933] sensu Kröger & Mapes, 2007 [Actinoceroida; Actinoceratoidea] sensu Kröger & Mapes, 2007 [Actinoceroida, Actinoceratoidea]
   |--o †Georginidae Wade, 1977; late E.-early M. Ord., Aust, Asia
   |  |-- †Georgina
   |  `-- †Mesaktoceras
   |--o †Wutinoceratidae Shimazu & Obata, 1938; ?late E.-early M.Ord (Whiterock); Asia. Aust. NAm. NEu.
   |  |-- †Wutinoceras
   |  |-- †Cyrtonybyoceras
   |  |-- †Adamsoceras
   |  `== other genera.
   |--o †Polydesmiidae Kobayashi, 1940; ?late E- M Ord. CAs.EAs.
   |  |-- †Polydesmia
   |  `-- †Ordoceras
   |--o †Actinoceratidae Seamann, 1853; ?late E.-M.Ord.-E.Sil.
   |  |-- †Actinoceras
   |  |-- †Kochoceras
   |  |-- †Paractinoceras
   |  |-- †Saffordoceras
   |  `-- †Troostoceras
   |?-o †Lambeoceratidae
   |  `-- †Lambeoceras
   |?-o †Huroniidae
   |  |-- †Huronia
   |  |-- †Huroniella
   |  `?- ?†Discoactinoceras
   |==o †Armenoceratidae Troedsson, 1926; early M.Ord-Sil.
   |  |-- †Armenoceras
   |  |-- †Nybyoceras
   |  |-- †Selkirkoceras
   |  |-- †Elrodoceras
   |  `--o †Gonioceratidae late M.Ord, NAm.
   |     `-- Gonioceras
   `--o †Ormoceratidae Seamann, 1853
      |-- †Ormoceras
      |-- †Metarmenoceras
      |-- †Parormoceras
      |-- †Troedssonoceras
      `== other genera.

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