Proposed use of the plenary powers to designate (i) a neotype for the nominal species Ammonites mammillatus Schlotheim, 1813 and (ii) a type species for the genus Douvilleiceras De Grossouvre, 1893 (Class Cephalopoda, Order Ammonoidea)
Published in Bull. Zool. Nom., in 1954, in volume 9, pages 250-254
Date published:1954