Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Acanthocidaris hastigera (ambulacral plates + primary spines) Description Left: Ambulacral plates. Right: Part of section of primary spine.Left: Scale 2 mm, Right: Scale 250 µ. Author Mortensen, Theodor JPG file - 56.73 kB - 966 x 255 pixels added on 2011-02-23254 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview