Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Chaetodiadema keiense (ambulacral plates + apical system) Description Left: Aboral ambulacral plates; Right: Part of apical system.Left: Scale 3 mm; Right: Scale 4 mm. Author Mortensen, Theodor JPG file - 116.11 kB - 827 x 654 pixels added on 2011-02-23208 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview