Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Clypeaster humilis (regeneration) Description Damaged echinoid. The damaged sea urchin succeeded in retaining the broken fragment and has incorporated it again by closing the openings with the calcareous meshwork. On this "new" surface new spines have developed (arrow right).Scale 10 mm. Author Schultz, Heinke JPG file - 252.38 kB - 945 x 1 326 pixels added on 2005-02-23638 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke Click here to return to the thumbnails overview