Opinion 302 Designation, under Tlie Plenary Powers, of a type species, for the genus Aulacostephanus Tornquist, 1896 (class Cephalopoda, order Ammonoidea) in harmony with accustomed nomenclatorial usage
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1954, in volume 8, issue 19, pages 261-272
Date published:1954-10-16