Opinion 300 Validation, Nder the Plenary Powers, of the generic name Sphaeroceras Bayle, 1878 (class Cephalopoda, order Ammonoidea)
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1954, in volume 8, issue 17, pages 237-248
Date published:1954-10-26