Opinion 428 Suppression under the Plenary Powers of the specific name royerianus d&#39;Orbigny, 1841, as published in the combination ammonites Royerianus and designation under the same Powers of a type species in harmony with accustomed practice for the genus Chehniceras, Hyatt, 1903 (class Cephalopoda, order Ammonoidea)

International Commission on Zoological Nomenclature

Article: Opinion 428 Suppression under the Plenary Powers of the specific name royerianus d'Orbigny, 1841, as published in the combination ammonites Royerianus and designation under the same Powers of a type species in harmony with accustomed practice for the genus Chehniceras, Hyatt, 1903 (class Cephalopoda, order Ammonoidea)

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Opinion 428 Suppression under the Plenary Powers of the specific name royerianus d'Orbigny, 1841, as published in the combination ammonites Royerianus and designation under the same Powers of a type species in harmony with accustomed practice for the genus Chehniceras, Hyatt, 1903 (class Cephalopoda, order Ammonoidea)