Classification of Lamsdell and Selden 2015

Or. †Ptychopariida Swinnerton 1915
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Fm. †Alokistocaridae Resser 1939
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Invalid names: Ehmaniellidae Sundberg 1994 [synonym]
Fm. †Crepicephalidae Kobayashi 1935
Fm. †Marjumiidae Kobayashi 1935
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G. †Coosella Lochman 1936
Invalid names: Coosellidae Palmer 1954 [synonym]
Fm. †Solenopleuridae Angelin 1854
Fm. †Tricrepicephalidae Palmer 1954
Or. †Proetida Fortey and Owens 1975
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Superfm. †Aulacopleuroidea Angelin 1854
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Fm. †Aulacopleuridae Angelin 1854
Fm. †Brachymetopidae Prantl and Pribyl 1951
Fm. †Otarionidae Richter and Richter 1926
Fm. †Hystricuridae Hupé 1953
Superfm. †Proetoidea Hawle and Corda 1847
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Fm. †Bathyuridae Walcott 1886
Fm. †Rorringtoniidae Owens and Hammann 1990
Fm. †Scharyiidae Osmolska 1957
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Subfm. †Scharyiinae Osmolska 1957
Fm. †Tropidocoryphidae Pribyl 1946
Invalid names: Aulacopleurida Adrain 2011 [synonym], Bathyuroidea Walcott 1886 [empty]
G. †Phillipsia Portlock 1843
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†Phillipsia belgica Osmólska 1970
Fm. †Cheiruridae Hawle and Corda 1847
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G. †Holotrachelus Holm 1898
Invalid names: Holotrachelidae Warburg 1925 [synonym]
†Gerastos tuberculatus Barrande 1846
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†Gerastos tuberculatus macrocensis Chatterton et al. 2006