Abstract
The genus Nemesis Furfaro & Mariottini, 2021, was recently introduced for an independent lineage of aeolid nudibranchs, and Dondice banyulensis Portmann & Sandmeier, 1960, established as its type species. Anyway, the presence of a senior homonym, Nemesis Risso, 1826, was evidently missed. In fact, in 1826, Risso established this genus for a group of Copepoda (Arthropoda, Crustacea) and according to the Principle of Priority (ICZN) only the senior homonym may be used as a valid name. Therefore, a new replacement name is here proposed. Furthermore, the genus name Nanuca Er. Marcus, 1957, has priority over Dondice Er. Marcus, 1958 and consequently, the species in this clade should be classified under Nanuca, mostly as new combinations.
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