Classification of the genus Caecum

G. Caecum Fleming 1813
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Subg. Caecum (Brochina) Gray 1837
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†Caecum (Brochina) banoni Benoist 1874
Subg. Caecum (Caecum) Fleming 1813
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Caecum (Caecum) regulare Carpenter 1858
Subg. †Caecum (Defolinia) Weisbord 1962
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†Caecum (Defolinia) flemingi Gardner and Aldrich 1919
†Caecum alterum Meyer 1886
†Caecum anellifer Pilsbry and Johnson 1917
†Caecum armoricum de Folin 1869
†Caecum beaufortensis Ward and Blackwelder 1987
†Caecum calvertense Martin 1904
†Caecum campe Pilsbry and Olsson 1941
†Caecum chipolanum Gardner 1947
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Invalid names: Caecum vestitum Folin 1870 [synonym]
Caecum cooperi Smith 1860
Caecum crebricinctum Carpenter 1864
Caecum cycloferum Folin 1867
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Invalid names: Caecum (Bambusum) coronellum Dall 1892 [synonym], Caecum clenchi Olsson and McGinty 1958 [synonym]
Caecum glabrum Montagu 1803
†Caecum greensboroense Martin 1904
Caecum imbricatum Carpenter 1858
Caecum johnsoni Winkley 1908
†Caecum mammillatum Wood 1842
Caecum mexicanum Collins 1937
†Caecum patuxentium Martin 1904
Caecum plicatum Carpenter 1858
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Invalid names: Caecum decussatum Folin 1869 [synonym]
†Caecum properegulare Mansfield 1925
Caecum quadratum Carpenter 1857
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Invalid names: Caecum dalli Bartsch 1920 [synonym], Caecum grippi Bartsch 1920 [synonym]
Caecum ryssotitum de Folin 1867
†Caecum tomaculum Weisbord 1962
Caecum veracruzanum Collins 1937