Classification of Palmer and Halley 1979
Or. †Olenellida Bergstrom 1973
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Fm. †Olenellidae Walcott 1890
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G. †Bristolia Harrington 1956
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†Bristolia anteros Palmer and Halley 1979
†Bristolia bristolensis Resser 1928
†Bristolia fragilis Palmer and Halley 1979
G. †Olenellus Hall 1861
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†Olenellus arcuatus Palmer and Halley 1979
†Olenellus brachyomma Palmer and Halley 1979
†Olenellus clarki Resser 1928
†Olenellus cylindricus Palmer and Halley 1979
†Olenellus euryparia Palmer and Halley 1979
†Olenellus fremonti Walcott 1910
†Olenellus gilberti White 1874
†Olenellus howelli White 1874
†Olenellus multinodus Palmer and Halley 1979
†Olenellus nevadensis Walcott 1910
†Olenellus puertoblancoensis Lochman 1952
Invalid names: Fremontia Raw 1936 [synonym], Mesonacis Walcott 1885 [synonym], Paedeumias Walcott 1910 [synonym]
G. †Peachella Walcott 1910
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†Peachella brevispina Palmer and Halley 1979
†Peachella iddingsi Walcott 1884
Or. †Corynexochida Kobayashi 1935
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Fm. †Dolichometopidae Walcott 1916
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G. †Glossopleura Poulsen 1927
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†Glossopleura lodensis Clark 1921
†Glossopleura tuta Resser 1945
†Glossopleura walcotti Poulsen 1927
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Invalid names: Glossopleura expansa Poulsen 1927 [synonym], Glossopleura sulcata Poulsen 1927 [synonym]
Invalid names: Sonoraspis Stoyanow 1952 [synonym]
G. †Poliella Walcott 1916
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†Poliella germana Resser 1939
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Invalid names: Dolichometopsis gravis Resser 1939 [synonym], Dolichometopsis potens Resser 1939 [synonym], Ptarmigania agrestis Resser 1939 [synonym], Ptarmigania altilis Resser 1939 [synonym], Ptarmigania dignata Resser 1939 [synonym]
†Poliella lomataspis Palmer and Halley 1979
Fm. †Dorypygidae Kobayashi 1935
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G. †Bonnia Walcott 1916
Invalid names: Ogygopsididae Rasetti 1951 [synonym]
Fm. †Oryctocephalidae Beecher 1897
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G. †Oryctocephalus Walcott 1886
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†Oryctocephalus americanus Sundberg and McCollum 2003
†Oryctocephalus nyensis Palmer and Halley 1979
Fm. †Zacanthoididae Swinnerton 1915
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G. †Albertella Walcott 1908
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†Albertella longwelli Palmer and Halley 1979
†Albertella schenki Resser 1945
†Albertella spectrensis Palmer and Halley 1979
G. †Albertelloides Fritz 1968
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†Albertelloides mischi Fritz 1968
†Albertelloides rectimarginatus Palmer and Halley 1979
G. †Fieldaspis Rasetti 1951
G. †Paralbertella Palmer and Halley 1979
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†Paralbertella bosworthi Walcott 1908
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Invalid names: Albertella similaris Resser 1936 [synonym], Albertella stenorhachis Rasetti 1951 [synonym]
G. †Ptarmiganoides Rasetti 1951
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†Ptarmiganoides crassaxis Palmer and Halley 1979
†Ptarmiganoides hexacantha Palmer and Halley 1979
Or. †Ptychopariida Swinnerton 1915
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G. †Alokistocare Lorenz 1906
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Invalid names: Amecephalus Walcott 1924 [synonym], Strotocephalus Resser 1935 [synonym]
G. †Alokistocarella Resser 1938
G. †Caborcella Lochman 1948
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†Caborcella pseudaulax Palmer and Halley 1979
†Caborcella reducta Palmer and Halley 1979
G. †Kochiellina Palmer and Halley 1979
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†Kochiellina groomensis Palmer and Halley 1979
†Kochiellina janglensis Palmer and Halley 1979
G. †Mexicella Lochman 1948
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†Mexicella grandoculus Palmer and Halley 1979
†Mexicella mexicana Lochman 1948
G. †Nyella Palmer and Halley 1979
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†Nyella clinolimbata Fritz 1968
†Nyella granosa Resser 1939
†Nyella immoderata Palmer and Halley 1979
G. †Plagiura Resser 1935
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†Plagiura extensa Palmer and Halley 1979
†Plagiura minor Palmer and Halley 1979
†Plagiura retracta Palmer and Halley 1979
Invalid names: Plagiurella Resser 1937 [synonym]
G. †Schistometopus Resser 1938
G. †Syspacephalus Resser 1936
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†Syspacephalus longus Palmer and Halley 1979
†Syspacephalus obscurus Palmer and Halley 1979
G. †Volocephalina Palmer and Halley 1979
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†Volocephalina connexa Palmer and Halley 1979
†Volocephalina contracta Palmer and Halley 1979