Opinion 307 Designation, under Tlie Plenary Powers, of a type species in harmony with accustomed usage for Arnioceras Hyatt, 1867 (class Cephalopoda, order Ammonoidea), a genus based upon a misidentified type species
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1954, in volume 8, issue 24, pages 323-334
Date published:1954-12-06