Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Rhopalocidaris hirsutispina (spine + apical system) Description Left: Secondary spine. Right: Part of apical system, female.Left: Scale 500 µ; Right: Scale 3 mm. Author Mortensen, Theodor JPG file - 52.51 kB - 523 x 472 pixels added on 2011-02-23218 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview