Five gymnosomatous molluscan taxa were recently introduced applying ‘open generic nomenclature’ by using the indication ‘Genus Clionidarum’ instead of a formal genus name and therefore violating ICZN art. 11.9.3 of the Code. Herein those taxa are validated by placing them in the type genus of the family Clionidae, followed by a question mark indicating here that they might as well belong to any other of the known (or as yet unknown) genera in the family Clionidae .