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Order Spirobolida Cook, 1895
***** Order Spirostreptida Brandt, 1833
*****Superfamily +Xyloiuloidea Cook, 1895 (Sometimes aligned with Spirobolida)
**** Superorder Nematophora Verhoeff, 1913
***** Order Callipodida Pocock, 1894
***** Order Chordeumatida Pocock 1894

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