Three new generic names are proposed to replace preoccupied names that have been assigned to rudist genera. These are: in the Family Monopleuridae - Araeopleura, nom. nov. for Stenopleura Pocta, 1889; in the Family Caprotinidae - Retha, nom. nov. for Ethra Matherson, 1878, and in the Family Radiolitidae - Dubertretia nom. nov. for Kelleria Milovanovic, 1938. Also the previously unnamed type species of Dubertretia is designated D. kelleri sp. nov.

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