Opinion 426 Designation under the Plenary Powers of type species in harmony with accustomed usage for the genera Pictonia Bayle, 1878, and Rasenia Salfeld, 1913 (class Cephalopoda, order Ammonoidea) (Jurassic)
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1956, in volume 14, issue 10, pages 257-280
Date published:1956-10-26