After Gon, 2002

<==o †Ptychopariina Richter, 1932
   |?-o †Ellipsocephaloidea [Redlichiida: Ellipsocephalacea Zhang et al., 1980; Redlichiida: Redlichiina: Ellipsocephaloidea Peterson & Edgecombe, 2006]
   |  |-- †Ellipsocephalidae
   |  |-- †Protolenidae
   |  `-- †Agraulidae [paraphyletic Solenopleuracea]
   `--o Ptychoparioidea Matthew, 1887 [Ptychopariacea]
      |-- †Ptychopariidae [Ptychopariacea]
      |-- †Marjumiidae [Marjumiacea:]
      |-- †Solenopleuridae [Solenopleuracea:]
      |-- †Conocoryphidae [Conocoryphacea:]
      |-- †Dokimocephalidae [Solenopleuracea:]
      |-- †Onchonotopsidae
      |--o †Nepeidae Whitehouse, 1939 [Nepeiidae] [Nepeacea Lochman-Balk in Harrington et al., 1959 ]
      |  |--o †Nepea Whitehouse, 1939 [taxonomic history]
      |  |  |-- †N. narinosa Whitehouse, 1939 [taxonomic history]
      |  |  |-- †N. nans (Öpik, 1970) [taxonomic history]
      |  |  |-- †N. tonsillata Öpik, 1970
      |  |  |-- †N. brevica Xiang & Zhang, 1985
      |  |  |-- †N. xinjiangensis Xiang & Zhang, 1985
      |  |  |-- †N. delicata Jago, Bao & Baillie, 2004
      |  |  `-- †N. hellyeri Jago, Bao & Baillie, 2004
      |  |-- †Ferenepea hispida Öpik, 1967 [taxonomic history]
      |  |--o †Penarosa Öpik, 1970 [taxonomic history]
      |  |  |-- †P. trinodus (Palmer & Gatehouse, 1972)  [taxonomic history]
      |  |  |-- †P. retifera Öpik, 1970 [taxonomic history]
      |  |  |-- †P. elaticeps Öpik, 1970 [taxonomic history]
      |  |  |-- †P. rhinodelphis Öpik, 1970 [taxonomic history]
      |  |  `-- †P. netenta Jell, 1977 [taxonomic history]
      |  `-- †Loxonepea loxophrys Öpik, 1970 [incl. L. sp. nov. ND Öpik, 1970]
      |-- †Crepicephalidae [Crepicephalacea]
      |-- †Lonchcephalidae [Solenopleuracea:]
      |-- †Kingstoniidae [Solenopleuracea:]
      |-- †Shumardiidae [Conocoryphacea:]
      |-- †Asaphiscidae [Asaphiscacea:]
      |-- †Coosellidae [Marjumiacea:]
      |-- †Elviniidae [incl. Komaspididae] [Komaspidacea:]
      |-- †Cedariidae
      |-- †Norwoodiidae [Norwoodiacea:]
      |-- †Menomoniidae [Norwoodiacea:]
      |-- †Bolaspididae [Norwoodiacea:]
      |-- †Papyriaspididae [Olenacea:]
      |-- †Emmrichellidae [Emmrichellacea]
      |-- †Diceratocephalidae
      |-- †Tengfengiidae
      |-- †Lisaniidae
      |-- †Inouyiidae
      |-- †Wuaniidae
      |-- †Lorenzellidae
      |-- †Proasaphiscidae
      |-- †Ignotogregatidae
      |-- †Holanshaniidae
      |-- †Mapaniidae
      `-- †Acrocephalidae

Reference(s):