Aphelodoris luctuosa is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Dorididae. It is endemic to New Zealand waters [source: NZOR. It has the following names as synonyms: \n* Aphelodoris affinis \n* Aphelodoris cheesemani [unjustified replacement name] \n* Aphelodoris purpurea \n* Doris luctuosa [original combination (="basionym" in botany)] It must not be confused with Aphelodoris luctuosa Bergh, 1905, which has been renamed Aphelodoris berghi Odhner, 1924, because of the homonymy.