Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Heterobrissus hystrix (ambulacrum) Description b. Adapical anterior ambulacrum: The uppermost plates carry a pair of pores, the lower pores are slit-like.Scale 2,7 mm. Author Schultz, Heinke JPG file - 53.28 kB - 355 x 661 pixels added on 2009-02-23195 viewsFrom reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... © 2009 Schultz, Heinke Click here to return to the thumbnails overview