ICZN. (1954). Opinion 200. Validation, under the Plenary Powers, of the accumstomed usage of the generic names
Tethys Linnaeus, 1767, and
Aplysia Linnaeus, 1767 (Class Gastropoda).
Opinions and declarations rendered by the International Commission on Zoological Nomenclature. 3: 241-265. [Issued 27th January, 1954].