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 » ReferencesArachnoides placenta (aboral)Description Aboral side: The periproct opens into a distinct marginal notch (arrow), and a naked furrow passes along the median suture in the posterior interambulacrum. In Arachnoides tenuis there is no marginal notch and no naked furrow.Author Schultz, HeinkeJPG file - 438.74 kB - 940 x 1 358 pixelsadded on 2005-02-23558 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha...© 2005 Schultz, HeinkeClick here to return to the thumbnails overview