2 10 11 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/da675e6f7c1f955ccb28658cfe235bcb.png 890560381a34841c5f1f11649c9e0203 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/d7eb9ad67662f54a626c0d85caf42278.png c6e2b2a7f0b5fb6fe557afc11ad07383 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 Fossils Description An account of the resource <p>Welcome to the fossils section of the website. This is designed to help you learn the different characteristics of each major fossil group so that you are able to distinguish between them.</p> <p>First year students, please refer to the specimens housed in the first year teaching laboratory. There is no substitute for handling the specimens themselves; this website is just an accessory to help you along the way.</p> <p>Animals occupy different environments, have different life habits and lived through different periods in geological time. It is good to be aware of these differences in lifestyle and timing, within and between phyla, classes, orders and families.</p> 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>Echinoid</h2> Description An account of the resource <h2>Taxonomy</h2> <p>Phylum: Echinodermata</p> <p>Class: Echinoidea</p> <h2>Diagnostic features</h2> <p>Ambulacra (tube feet)</p> <p>Periproct (opening for anus)</p> <p>Peristome (opening for mouth)</p> <p>Pentaradial symmetry (regular echinoids)</p> <p>Bilateral symmetry imposed upon pentaradial symmetry (irregular echinoids)</p> <h2>Stratigraphic range</h2> <p>Ordovician to Present (Irregular Echinoids from Jurassic to Present)</p> <h2>Way of life</h2> <h3>Regular echinoids:</h3> <p>Grazers with functional jaw apparatus</p> <p>Long spines for protection and movement</p> <p>Epifaunal at a wide range of depths</p> <p>Use tube feet for respiration and movement</p> <h3>Irregular echinoids:</h3> <p>Feed on organic matter in sediment, front shaped to funnel sediment into mouth</p> <p>Use fine spines to move</p> <p>Infaunal burrowers</p> <p>Use tube feet for respiration</p> <h2>Advanced notes</h2> <p>Grazing echinoids leave a distinctive pentagonal feeding trace<span> </span><em>Gnathicnus pentax</em>.</p> <p><a href="https://www.digitalatlasofancientlife.org/learn/nature-fossil-record/types-of-fossil-preservation/">Learn about types of preservation</a></p> <h2>Specimens</h2> <p><a href="/p1acollections/exhibits/show/echinoids" target="_blank" rel="noreferrer noopener">Browse echinoids</a></p> bilateral pentaradial spines symmetry