Classification of the genus Longoconcha
G. †Longoconcha Stephenson 1941
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†Longoconcha dalli Stephenson 1941
†Longoconcha eumeka Saul and Squires 2008
†Longoconcha imbricatus Sohl 1964
†Longoconcha quadrilirata Sohl 1964
†Longoconcha tennesseensis Wade 1926