Classification of the genus Trigoniocardia
G. Trigoniocardia Dall 1900
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†Cardium (Trigoniocardia) ballenium Pilsbry and Olsson 1941
†Cardium (Trigoniocardia) cabopasadum Pilsbry and Olsson 1941
†Cardium (Trigoniocardia) gadsdenense Mansfield 1937
†Corculum (Trigoniocardia) heredium ohomachii Oinomikado 1939
Subg. Trigoniocardia (Apiocardia) Olsson 1961
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Apiocardia obovale Sowerby 1833
†Apiocardia spiekeri Hanna and Israelsky 1925
Trigoniocardia (Apiocardia) antillarum d'Orbigny 1853
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Invalid names: Trigoniocardia caboblanquensis Weisbord 1964 [synonym]
†Trigoniocardia (Apiocardia) heridia Olsson 1922
†Trigoniocardia (Apiocardia) simrothi Dall 1900
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Invalid names: Cardium (Fragum) apatetica Dall 1900 [synonym]
Trigoniocardia (Apiocardia) subovalis Broderip and Sowerby 1829
Subg. †Trigoniocardia (Goniacardia) Woodring 1982
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†Trigoniocardia (Goniacardia) callopleurum Gabb 1881
†Trigoniocardia (Goniacardia) melajoensis Jung 1969
Subg. Trigoniocardia (Trigoniocardia) Dall 1900
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†Trigoniocardia (Trigoniocardia) aliculum Dall 1900
†Trigoniocardia (Trigoniocardia) aminensis Dall 1900
†Trigoniocardia (Trigoniocardia) haitensis Sowerby 1850
†Trigoniocardia (Trigoniocardia) hannai Olsson 1932
†Trigoniocardia (Trigoniocardia) minutissima Toula 1911
†Trigoniocardia (Trigoniocardia) samanicum Olsson 1928
†Trigoniocardia carolinae Maury 1912
†Trigoniocardia cordeliae Maury 1924
Trigoniocardia graniferum Broderip and Sowerby 1829
†Trigoniocardia heredia Olsson 1922
†Trigoniocardia sambaicum Maury 1917