Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Parasalenia gratiosa (ambulacrum) Description Ambulacrum: The small pore-pairs are arranged in steep arcs of three, the primary tubercles are large.Scales 2 mm. Author Mortensen, Theodor JPG file - 219.17 kB - 717 x 1 520 pixels added on 2005-02-23272 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Mortensen, Theodor Click here to return to the thumbnails overview