After Vaccari, Edgecombe & Escudero, 2004, Ortega-Hernández, Legg, Tremewan & Braddy, 2010, and Collette & Hagadorn, 2010

<==o †Euthycarcinoidea Gall & Grauvogel, 1964 [Archicopepoda; Euthycarcinata]
   |?- †Antarcticarcinus pagoda Collette, Isbell & Miller, 2017
   |?- †Mosineia macnaughtoni Collette & Hagadorn, 2010
   |?- †Mictomerus melochevillensis Collette & Hagadorn, 2010 [Mictomeridae Collette & Hagadorn, 2010]
   |--o †Sottixeriformes
   |  |-- †Pieckoxerxes piekoae (Schram & Rolfe 1982)
   |  `-- †Sottyxerxes multiplex Schram & Rolfe 1982
   `--o †Euthycarciniformes Starobogatov, 1988
      |?- †Apankura machu Vaccari, Edgecombe & Escudero, 2004
      |?- †Arthrogryrinus platyurus Wilson & Almond, 2001
      |--o †Euthycarcinidae Handlirsch, 1914
      |  |?- †Synaustrus brookvalensis Riek 1964
      |  `--o †Euthycarcinus Handlirsch, 1914
      |     |-- †E. ibbenburensis Schultka, 1991
      |     |-- †E. kessleri Handlirsch, 1914
      |     `-- †E. martensi Schneider, 1983
      `--o †Kottixerxidae Starobogatov, 1988
         |?- †Heterocrania rhyniensis Hirst & Maulik, 1926
         |?- †Kalbarria brimmellae McNamara & Trewin, 1993
         |?- †Schramixerxes gerem (Schram & Rolfe 1982)
         |--o †Kottixerxes Schram, 1971
         |  |-- †K. gloriosus Schram, 1971
         |  `-- †K. anglicus Wilson & Almond, 2001
         `--o †Smithixerxes Schram & Rolfe, 1982
            |-- †S. juliarum Schram & Rolfe, 1982
            `-- †S. pustulosus Wilson & Almond, 2001

Reference(s):