Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Gracilechinus gracilis (ambulacral plates + apical system) Description Left: Ambulacral plates. Right: Apical system.Left: Scale 4 mm, right: Scale 4 mm. Author Mortensen, Theodor JPG file - 92.88 kB - 807 x 565 pixels added on 2011-02-23411 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview