Classification of the subfamily Chaoiellinae
Subfm. †Chaoiellinae Lazarev 2011
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Tr. †Chaoiellini Lazarev 2011
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G. †Alpavlia Lazarev 2011
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†Alpavlia bathycolpos Schellwien 1892
†Alpavlia boliviensis d'Orbigny 1842
G. †Chaoiella
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†Chaoiella geniculata Gobbett 1964
†Chaoiella gruenewaldti Krotov 1888
†Chaoiella ustritskyi Chen and Shi 2006
†Chaoiella volkovi Fredericks 1926
G. †Praehorridonia Ustritsky 1963
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†Praehorridonia dorsoplicata Ustritsky 1963
†Praehorridonia qitaiensis Wang and Yang 1998
Tr. †Rugatiini Lazarev 2011
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G. †Nudauris Stehli 1954
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†Nudauris convexa Cooper and Grant 1975
†Nudauris diabloensis Stehli 1954
†Nudauris enigmatica Cooper and Grant 1975
†Nudauris linospina Cooper and Grant 1975
†Nudauris presplendens Cooper and Grant 1975
†Nudauris reticulata Cooper and Grant 1975
†Nudauris splendens Cooper and Grant 1975
†Nudauris transversa Cooper and Grant 1975
†Nudauris tribulosa Cooper and Grant 1975
†Nudauris whitei Cooper and Grant 1975
G. †Rugatia Muir-Wood and Cooper 1960
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†Rugatia andersoni Stehli and Grant 1970
†Rugatia convexa Cooper and Grant 1975
†Rugatia costiformis Chang 1987
†Rugatia incurvata King 1931
†Rugatia intermedia Hoover 1981
†Rugatia mckeei Cooper and Grant 1975
†Rugatia occidentalis Newberry 1861
†Rugatia paraindica McKee 1938
G. †Spinarella Cooper and Grant 1975
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†Spinarella costellata Cooper and Grant 1975
†Spinarella lobata Cooper and Grant 1975
†Spinarella paulula Cooper and Grant 1975
†Spinarella perfecta Cooper and Grant 1975
G. †Xestosia Cooper and Grant 1975
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†Xestosia obsolescens Cooper and Grant 1975
†Xestosia schucherti King 1931