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Proposed Use of the Plenary Powers to Designate a Type Species in Harmony with Generally Accepted Usage for the Genus Ptychopyge Angelin, 1854 (Class Trilobita)
Digital Gems > Biodiversity Library of Southeast Asia
Creator:
Jaanusson, Valdar
Publication date:
1956/11/30
Publisher:
Printed by Order of the International Commission on Zoological Nomenclature, London
1956