A new integrated search interface will become available in the next phase of marineinfo.org.For the time being, please use IMIS to search available data PeopleInstitutesProjectsData setsPublicationsEvents IMIS Photogallery » ReferencesEchinothurioida (oral primary spines)Description Points of echinothurioid spines: Oral primary spines serving for locomotion: Left: Phormosoma bursarium: with a distally inflated skin sheath. Right: Araeosoma violaceum: with a hoof.No scale provided.Author Mortensen, TheodorJPG file - 155.61 kB - 1 200 x 1 719 pixelsadded on 2011-02-23489 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de...© 2011 Mortensen, TheodorClick here to return to the thumbnails overview