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Morphological studies on the Echinoidea Holectypoida and their allies. X. On Apatopygus gen. nov. and the affinities of some recent Nucleolitoida and Cassiduloida

Authors: H L Hawkins

Published in Geological Magazine, in 1920, in volume 57, issue 675, pages 393-401

Created: 2017-10-11, modified: 2017-10-11

doi:10.1017/S0016756800106600