1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/89971fb077904c4a99127760472f86da.png bceb196f6a84f6bd71cf0f40b9b64a82 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/2bb5468a533d7778aee98703471bddd4.png c8085ee8501917f4791bb012dbba7ada 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>Crinoid</h2> Description An account of the resource <h2>Taxonomy</h2> <p>Phylum: Echinodermata</p> <p>Class: Crinoidea</p> <h2>Diagnostic Features</h2> <p>Crown</p> <p>Stalk</p> <p>Pentaradial symmetry</p> <p>Ossicles</p> <p>Calyx</p> <p>Pinnule</p> <p>Holdfast</p> <h2>Way of life</h2> <p>Benthic (some pseudoplanktonic)</p> <p>Filter feeders</p> <h2>Stratigraphic range</h2> <p>Ordovician to present</p> <h2>Advanced Notes</h2> <p>The heyday of the crinoids was the Palaeozoic, where they dominated shallow marine environments. Modern crinoids are exclusively deep marine, and the diversity of forms is far less than it was during the Paleozoic.</p> <p>Were they victims of the increased grazing and predation pressure of the Mesozoic Marine Revolution?</p> <h2>Specimens</h2> <p><a href="/p1acollections/exhibits/show/crinoids" target="_blank" rel="noreferrer noopener">Browse crinoids</a></p> <h2>Links</h2> <p><a href="https://www.youtube.com/watch?v=s1xfRc4SDsw" target="_blank" rel="noreferrer noopener">youtube</a>: modern crinoid behaving pseudoplanktonically. You can see the pinnules, crown and multiple stalks.</p> <p><a href="https://www.flickr.com/search/?q=crinoid" target="_blank" rel="noreferrer noopener">flickr</a>: beautiful photographs of both living and fossil crinoids. Compare the levels of detail you can see, admire the colours, and spot the distinctive features that make these crinoids identifiable.</p> <p><a href="https://www.digitalatlasofancientlife.org/learn/nature-fossil-record/types-of-fossil-preservation/">Learn about types of preservation</a></p> benthic pentaradial symmetry