Direction 100 Determination of the gender to be attributed to certain generic names having the Termination " -Gnathus " or, as the case may be, the Termination " -Rhynchus " placed on the Official List of Generic Names in Zoology in the period up to the end of 1936
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1958, in volume 1F, issue F.11, pages 175-190
Date published:1958-05-30