Classification of Crickmay 1933
G. †Orbiculoidea d'Orbigny 1847
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†Orbiculoidea pileolus Whiteaves 1889
†Orbiculoidea semipolita Whiteaves 1884
G. †Flabellirhynchia Buckman 1917
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†Flabellirhynchia concinna Crickmay 1933
†Flabellirhynchia falconis Crickmay 1933
G. †Globirhynchia Buckman 1917
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†Globirhynchia gnathophora Meek 1864
†Globirhynchia oblatopinguis Crickmay 1933
†Globirhynchia rhacta Crickmay 1933
†Globirhynchia schucherti Crickmay 1933
G. †Kallirhynchia Buckman 1917
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†Kallirhynchia myrina Hall and Whitfield 1877
†Kallirhynchia orthidioides Whiteaves 1876
†Kallirhynchia phylarchus Crickmay 1933
†Kallirhynchia valliculae Crickmay 1933
†Kallirhynchia whiteavesi Warren 1932
G. †Rhynchonella Fischer 1809
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†Rhynchonella maudensis Whiteaves 1884
†Rhynchonella obesula Whiteaves 1876
G. †Euidothyris Buckman 1917
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†Euidothyris francescalaurae Stauffer 1930
†Euidothyris lucerna Crickmay 1933
G. †Loboidothyris Buckman 1917
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†Loboidothyris meeki Crickmay 1933
†Loboidothyris mormonensis Crickmay 1933
†Loboidothyris robusta Whiteaves 1889
G. †Ornithella
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†Ornithella curticensis Crickmay 1933
†Ornithella gemina Crickmay 1933
†Ornithella skidegatensis Whiteaves 1876
†Ornithella syringothyrides Crickmay 1933
G. †Ptyctothyris Buckman 1917
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†Ptyctothyris hardgravensis Crickmay 1933
†Ptyctothyris phlegethontis Crickmay 1933