After Hou & Bergström, 1997

<==o Lamellipedia Hou & Bergström, 1997 sensu Hou & Bergström, 1997 [incl. Arachnomorpha Heider, 1913, emend. Størmer, 1944; Trilobitomorpha Størmer, 1944]
   |--o †Marrellomorpha (Beurlen, 1934) Störmer, 1944
   |  |-- †Austromarrella klausmuelleri Haug, Castellani, Haug, Waloszek & Maas, 2012
   |  |-- †Furca bohemica Fritsch, 1908
   |  |-- †Vachonisia rogeri Lehmann, 1956 [Acercostraca Lehmann, 1955: Vachonisiida]
   |  |-- †Xylokoris chledophilia Siveter, Fortey, Sutton, Briggs & Siveter, 2007
   |  |-- †Marrella splendens Walcott, 1912 [Marrellida Raymond, 1935 [nom. correct. Størmer in Moore, 1959 pro Marrellina Raymond, 1935]: Marrellidae Walcott, 1912] M. Camb. WNA.
   |  `-- †Mimetaster hexagonalis Gürich, 1932 [Mimetasterida Beurlen, 1934: Mimetasteridae] L.Dev. NA.
   `--o Artiopoda Hou & Bergström, 1997 [Trilobitomorpha Størmer, 1944] (trilobite-like arthropods; trilobiittimäiset niveljalkaiset)
      |-- †Nectopleura Hou & Bergström, 1997
      `--+-- †Conciliterga Hou & Bergström, 1997 (piilopyrstöiset)
         |-- †Petalopleura Hou & Bergström, 1997
         |-- †Trilobita Walch, 1771 (trilobites; trilobiitit)
         `--+--o †Xenopoda Raymond, 1935 [Emeraldellida Störmer, 1944; Prochelicerata Störmer, 1944]
            |  |--o †Emeraldellida Störmer, 1944
            |  |  `--o †Emeraldellidae Raymond, 1935
            |  |     `-- †Emeraldella brocki Walcott, 1912; M. Camb. WNA.
            |  `--o †Limulavida Walcott, 1911
            |     `--o †Sidneyiidae Walcott, 1911
            |        `-- †Sidneyia inexpectans Walcott, 1911
            |-- †Aglaspidida Walcott, 1911 emend. Bergström, 1968 [sensu lato?]
            `-- Chelicerata Heymons, 1901 (chelicerates; kynsileukaiset)

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