ICZN 1958. Opinion 502. Validation under the Plenary Powers of the generic name Lepidurus Leach, 1819 (Class Crustacea, Order Phyllopoda), designation under the same Powers of a type species in harmony with accustomed usage for the nominal genus Triops Schrank, 1803 (Class Crustacea, Order Phyllopoda) and addition of those names and of Apus Scopoli, 1777 (Class Aves), to the Official List of Generic Names in Zoology and matters incidental thereto. Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature 18(3): 65–120. BHL.