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):
- Gon III, S. M., 2002: Systematic listing of Trilobite families.
–iNet: http://www.aloha.net/~smgon/trisystem.htm - Paterson, J. R., 2005: Systematics of the Cambrian trilobite family Nepeidae, with revision of Australian species.
–Palaeontology: Vol. 48, #3, pp. 479-517