The purpose of this application, under Article 23.9.3 of the Code, is to conserve the generic name Sematura Dalman, 1825 (Lepidoptera, sematuridae) which is well-established for a small number of moths widespread in the Neotropical region. Because it is also the type genus of the small family sematuridae, it is usually cited or illustrated in general works on Lepidoptera and insects in the region. The name is threatened by its rarely used senior subjective synonym, Mania Hübner, 1821, which dropped out of use because it was incorrectly considered to be an unavailable homonym. It is proposed that Sematura Dalman be given precedence over Mania Hübner under the plenary power of the Commission, in the interest of nomenclatural stability.