Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Hesperocidaris houstoniana (aboral) Description Aboral side: The spines are stout and thickened at the base.Diameter of test 19 mm; Galapagos Is.ZMUC ECH 164 Author Schultz, Heinke JPG file - 133.61 kB - 945 x 1 148 pixels added on 2011-02-23211 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Schultz, Heinke Click here to return to the thumbnails overview