Opinion 200 Validation, under the Plenary Powers, of the accustomed usage of the generic names Tethys Linnaeus, 1767, and Apjysia Linnaeus, 1767 (class Gastropoda)
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1954, in volume 3, issue 19, pages 239-266
Date published:1954-01-21