Photographs: Holotype of Placocyathus cristatus (Vaughan in Vaughan and Hoffmeister, 1925); specimen USNM 353643, locality USGS 7785 (?Cercado Formation, Dominican Republic).
Photos in Cairns and Wells, 1987, Plate 8, Figs. 15, 16.
Scale bar for both photos = 1.0 cm.
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