After Carroll, 1988, and Grande & Bemis, 1998

<==o †Parasemionotiformes Lehman, 1966
   `--o †Parasemionotidae Stensiö, 1932
      |?- †Albertonia cupidinia
      |-- †Jacobulus novus Lehman, 1952
      |-- †Jurongia fusiformis Liu in Liu et al., 2002; L.Trias. EAs.
      |-- †Qingshania cercida Liu in Liu et al., 2002; L.Trias. EAs.
      |-- †Suius brevis Liu in Liu et al., 2002; L.Trias. EAs.
      |-- †Thomasionotus Lehman, 1952
      |--+--o †Watsonulus Piveteau, 1934; E.Trias. Mad. NA.
      |  |  `-- †W. eugnathoides
      |  `-- †Parasemionotus labourdei Piveteau, 1929
      |-- †Phaidrosoma lunzensis U. Trias. Eu.
      |-- †Praesemionotus E. Trias. Eu.
      |-- †Promecosomina beaconensis M.-U. Trias. Aust.
      |--o †Stensioenotus Lehman, 1952 [†Stensiönotus Lehman, 1952]
      |  `-- †S. dongchangensis Liu, in Liu et al., 2002
      |-- †Lehmanotus Beltan, 1968
      |-- †Devillersia Beltan, 1968
      |-- †Piveteaunotus Beltan, 1968
      `-- †Icarealcyon Beltan, 1980

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