Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Phyllacanthus dubius (spine + ambulacral plates) Description Left: Part of transverse section of primary spine: The furrows between the well separated ridges are filled with cortical meshwork. Right: Part of ambulacrum.Left: Scale 1 mm. Right: Scale 2 mm. Author Mortensen, Theodor JPG file - 134.83 kB - 1 497 x 402 pixels added on 2011-02-23247 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview