Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Tetrapygus niger (aboral) Description Aboral side: The spines are longest at the ambitus.Diameter of test 52 mm, Caldera, Chile. Author Schultz, Heinke JPG file - 250.11 kB - 1 181 x 1 194 pixels added on 2005-02-23278 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke Click here to return to the thumbnails overview