Template:Opinion 207

• ICZN 1954. Opinion 207. Designation, under the Plenary Powers, of type species in harmony with accustomed use for the genera Echinocyamus van Phelsum, 1774, and Fibularia Lamarck, 1816 (class Echinoidea). Bulletin of zoological nomenclature 3(26): 339–352. BHL.  
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• Date of publication: 8 March 1954