After Parker, 1982, Hou & Bergström, 1997, and Martin & Davis, 2001

Alternative (older) taxonomy after Parker, 1982

<==o Maxillopoda Dahl, 1956 (leukajalkaiset?)
   |?-o †Skaracarida Müller & Waloszek, 1985
   |  `--o †Scaraidae Müller & Waloszek, 1985
   |     `--o †Scara Müller, 1983
   |       |-- †S. anulata Müller, 1983
   |       |-- †S. minuta
   |       `-- †S. sp. [M.-U.Camb. EAs. (Hunan)] [Dong, Donoghue, Liu, Z., Liu, J. & Peng, 2005]
   |--o Thecostraca Gruvel, 1905 [Branchiura, in partim]
   |  |-- Hansenocaris Itô [Facetotecta Grygier, 1985]
   |  |--o Ascothoracida Lacaze-Duthiers, 1880
   |  |  |--o Laurida Grygier, 1987
   |  |  |  |-- Lauridae Gruvel, 1905
   |  |  |  |-- Petrarcidae Gruvel, 1905
   |  |  |  `-- Synagogidae Gruvel, 1905
   |  |  `--o Dentrogasterida Grygier, 1987
   |  |     |-- Ascothoracidae Grygier, 1987
   |  |     |-- Ctenosculidae Thiele, 1925
   |  |     `-- Dendrogastridae Gruvel, 1905
   |  `-- Cirripedia Burmeister, 1834 (siimajalkaiset)
   |--o Tantulocarida Boxshall & Lincoln, 1983
   |  |-- Basipodellidae Boxshall & Lincoln, 1983
   |  |-- Deoterthridae Boxshall & Lincoln, 1983
   |  |-- Doryphallophoridae Huys, 1991
   |  |-- Microdajidae Boxshall & Lincoln, 1983
   |  `-- Onceroxenidae Huys, 1991
   |--+-- Pentastomida Diesing, 1836 (punkkimadot)
   |  `--o Branchiura Thorell, 1864 (kalatäit)
   |     `--o Arguloida Yamaguti, 1963 (kalatäit)
   |        `-- Argulidae Leach, 1819 [incl. Dipteropeltidae Yamaguti, 1963] (kalatäit)
   |--o Mystacocarida Pennack & Zinn, 1943
   |  `--o Mystacocaridida Pennack & Zinn, 1943
   |     `-- Derocheilocarididae Pennack & Zinn, 1943
   `-- Copepoda (hankajalkaiset)

Reference(s):