1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/3e118be7d0f134049051257080257205.png 3a6ae881da3d07c53bf23ceb0f7091e3 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/3ee2f1620121ef6b9ec81730648cfe5f.png 81f86ef81494e7c696f14894d6682827 Physical Object An inanimate, three-dimensional object or substance. Note that digital representations of, or surrogates for, these objects should use Moving Image, Still Image, Text or one of the other types. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource <h2><strong>TF0906<br /></strong></h2> <h2>Regular echinoid (cast)</h2> Description An account of the resource <div class="element"> <h3>Taxonomy</h3> <div class="element-text">Phylum: Echinodermata<br />Class: Echinoidea<br />Subclass: Regularia</div> </div> <div class="element"> <h3>Distinctive Features</h3> <div class="element-text">Pentaradial symmetry<br />Anus and peristome lie in line<br />Spine attachments<br />Five sets of ambulacra</div> </div> <div class="element"> <h3>Preservation</h3> <div class="element-text">Cast (internal mould of an external mould)</div> </div> <div class="element"> <h3>Advanced notes</h3> <div class="element-text">Spine attachments very much larger than for irregular echinoids as they have to hold much larger spines. Spines on regular echinoids are for defence and preventing predation, unlike for irregular echinoids where the spines are for movement in burrows. Watch a video of regular echinoids moving:<span> </span><a href="https://www.youtube.com/watch?v=D3W4OCnHyCs">BBC Wildlife Army of Sea Urchins</a></div> </div> defence pentaradial symmetry