After Parker, 1982

<==o Oniscoidea (maasiirat, tarhasiirat)
   |--o TYLOMORPHA
   |  `-- Tylidae
   `--o LIGIAMORPHA
      |--o DIPLOCHETA
      |  |-- Ligiidae
      |  |-- Mesonscidae
      |  |--o TRICHONISCOIDEA
      |  |  `-- Trichoniscidae (pikkusiirat)
      |  `--o STYLONISCOIDEA
      |     |-- Schoebliidae
      |     |-- Styloniscidae
      |     |-- Titaniidae
      |     `-- Tunanoniscidae
      `--o CRINOCHETA
         |--o ATRACHEATA
         |  |-- Bathytropidae
         |  |-- Berytoniscidae
         |  |-- Halophiloscidae
         |  |-- Olibrinidae
         |  |-- Oniscidae (tarhasiirat)
         |  |-- Philosciidae
         |  |-- Platyarthridae
         |  |-- Pudeoniscoidae
         |  |-- Rhyscotidae
         |  |-- Scyphacidae
         |  |-- Speleoniscidae
         |  |-- Sphaeroniscidae
         |  |-- Stenoniscidae
         |  `-- Tendosphaeridae
         `--o PSEUDOTRACHEATA*
            |-- Actaeciidae
            |-- Armadillidae
            |-- Armadillidiidae (pallosiirat)
            |-- Atlantidiidae
            |-- Balloniscidae
            |-- Buddelundiellidae
            |-- Cylisticidae
            |-- Eubellidae
            |-- Periscyphicidae
            |-- Porcellionidae
            `-- Trachelipidae

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