Opinion 1701 Ptychagnostus Jaekel, 1909 and Glyptagnostus Whitehouse, 1936 (Trilobita): accepted usage conserved

International Commission on Zoological Nomenclature

Published in Bulletin of Zoological Nomenclature, in 1993, in volume 50, pages 63-64

Date published:1993-03-25

BHL: 12249484
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