Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Histocidaris longicollis (pedicellaria + primary spine) Description Left: Valve of tridentate pedicellariae. Right: Part of primary spine: The thorns are developed mainly at the upper side (to the right).Left: Scale 1 mm. Right: Scale 2 mm. Author Schultz, Heinke JPG file - 32.41 kB - 419 x 827 pixels added on 2011-02-23183 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Schultz, Heinke Click here to return to the thumbnails overview