Classification of the genus Syncyclonema
G. †Syncyclonema Meek 1864
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†Syncyclonema cretacea Nyst 1843
†Syncyclonema gamsensis Dhondt 1971
†Syncyclonema gibsonia Skwarko 1967
†Syncyclonema greppini Pictet and Renevier 1858
†Syncyclonema haeggi Dhondt 1971
†Syncyclonema hagenowi Dhondt 1971
†Syncyclonema haggi Dhondt 1971
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Invalid names: Pecten (Entolium) pusillulus Griepenkerl 1889 [synonym], Pecten laevis Nilsson 1827 [replaced]
†Syncyclonema haldonensis Woods 1902
†Syncyclonema kingi Stephenson 1941
†Syncyclonema latum Anderson 1958
†Syncyclonema nilsoni Goldfuss 1835
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Invalid names: Pecten orbicularis Sowerby 1817 [synonym], Pecten spathulatus Roemer 1841 [synonym]
†Syncyclonema operculiformis Gabb 1864
†Syncyclonema semiplicata Alth 1850