Classification of Olsson 1932
G. Bursa Roding 1798
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G. Turritella Lamarck 1799 [turret shell]
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†Turritella abrupta Spieker 1922
†Turritella fica Olsson 1932
†Turritella gonisotoma Valenciennes 1833
†Turritella hubbardi Hodson 1926
†Turritella illesca Olsson 1932
†Turritella inca Grzybowski 1899
†Turritella prenuncia Spieker 1922
†Turritella varicosta Spieker 1922
G. Arca Linnaeus 1758 [ark]
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Subg. Arca (Diluvarca) Woodring 1925
†Arca colomba Olsson 1932
†Arca sechurana Olsson 1932
†Arca spiekeri Olsson 1932
†Arca valdiviana Grzybowski 1899
†Arca vanholsti Spieker 1922
†Arca dariensis Brown and Pilsbry 1911
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Invalid names: Arca gatunensis Toula 1911 [synonym]
Subg. Pecten (Plagioctenium) Dall 1898
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†Pecten (Plagioctenium) woodringi Spieker 1922
Subg. Polinices (Polinices) Montfort 1810
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†Polinices (Polinices) coronis Hanna and Israelsky 1925
†Arca (Senilia) chiriquiensis Gabb 1861
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†Arca (Senilia) chiriquiensis toroensis Spieker 1922