Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Eucidaris metularia (ambulacrum) Description Close-up of ambulacrum: Each marginal spine is associated with a smaller inner one, the median zone is naked.Scale 3 mm. Author Schultz, Heinke JPG file - 107.53 kB - 715 x 435 pixels added on 2005-02-23335 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke Click here to return to the thumbnails overview