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 » ReferencesEchinothuriidae (ends of oral primary spines)Description In all species of the echinothuriids the oral primary spines are equipped with a distal hoof. Distal end of oral spine of (a) Araeosoma coriaceum; (b) Araeosoma fenestratum; (c) Calveriosoma hystrix; (d) Hygrosoma luculentum [left to right].Scales 2 mm.Author Mortensen, TheodorJPG file - 53.18 kB - 945 x 759 pixelsadded on 2011-02-231 280 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de...© 2011 Mortensen, TheodorClick here to return to the thumbnails overview