Aporodoris is a genus of sea slugs, dorid nudibranch, shell-less marine gastropod molluscs in the family Discorididae.

Here, two questions are discussed: 1) the generic affinities proposed for millegrana, and 2) the valid name of the clade it belongs to, knowing that millegrana is the type species of the genus name Aporodoris von lhering 1886, by original designation.

Valdes and Gosliner (2001) argued that in this case, however, the ICZN Article 23.9 (not 23.9.2) applies and that the younger name should be regarded as valid.

According to Article 23.9, prevailing usage can be maintained only if two conditions are met (described in 23.9.1), one of which (23.9.1.1) is that the senior synonym must not have been used as a valid name after 1899.

Therefore Aporodoris is a valid name, regardless of whether Taringa has been widely used or not.In addition, but not noted by Dayrat, the combination Aporodoris millegrana was treated as the valid combination for this species between 1910 (Eliot, 1910b) and 1981 (Thompson and Brown, 1981) in listings of the British molluscan fauna (Winckworth, 1932;[5] White, 1937;[6] Turk, 1973 [7]) However, according to Article 23.10 of the International Code of Zoological Nomenclature (1999), this action stands and Taringa should be used as the valid name until such time as the Commission rules otherwise.