The purpose of this application, under Article 23.9.5 of the Code, is to conserve the specific name Helix plicaria Lamarck, 1816, a junior primary homonym of Helix plicaria . These names are currently in use for two different groups of land and freshwater snails, respectively, and have not been treated as congeneric since 1828. Helix plicaria was first transferred to the genus Bulimus and subsequently to the genera Thiara , Melania , Melanoides and Stenomelania . Helix plicaria has either been treated as belonging to Helix , Cochlea or has been included in Hemicycla . It is proposed that Helix plicaria be conserved by ruling it is not invalid by reason of being a junior homonym of Helix plicaria .