Classification of Sepkoski 1998

Cl. †Trilobita Walch 1771 [trilobite]
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G. †Ranasasus Cullison 1944
Or. †Corynexochida Kobayashi 1935
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Subor. †Illaenina Jaanusson 1959
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Fm. †Styginidae Vogdes 1890
Or. †Ptychopariida Swinnerton 1915
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Invalid names: Harpina Whittington 1959 [empty]
Or. †Proetida Fortey and Owens 1975
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Fm. †Proetidae Salter 1864
Superfm. †Phacopoidea Hupe 1953
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Fm. †Phacopidae Hawle and Corda 1847
Subor. †Harpina Whittington 1959
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Fm. †Harpetidae Hawle and Corda 1847
G. †Pseudoclelandia Ross 1951
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Invalid names: Pseudoclelanida Ross 1951 [misspelling]