1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/f808e3ec0d833eff8e232581503399ec.png 3549fe4d6f9b46f0de935398436ed6e0 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/7f5bf0ca9ff1f619804426b9ed0efd9f.png f6fa66594cb2a1ebb944762131f31d84 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>TF0331<br /></strong></h2> <h2>Ammonite Aptychus</h2> Subject The topic of the resource <h3>Location</h3> <span>Kimmeridge Clay, Roslyn Pit, Ely</span> Description An account of the resource <div class="element"> <h3>Species</h3> <div class="element-text">latus Parkinson</div> </div> <div class="element"> <h3>Stratigraphic Range</h3> <div class="element-text">Jurassic</div> </div> <div class="element"> <h3>Taxonomy</h3> <div class="element-text">Phylum: Mollusca<br />Class: Cephalopoda<br />Subclass: Ammonoidea<br />Order: Ammonitida</div> </div> <div class="element"> <h3>Distinctive Features</h3> <div class="element-text">Straight edge<br />Growth lines<br />Curved plate</div> </div> <div class="element"> <h3>Preservation</h3> <div class="element-text">Calcite<br />Disarticulated from ammonite shell</div> </div> <div class="element"> <h3>Advanced notes</h3> <div class="element-text">One could be forgiven for thinking, at first glance, that this was the valve of a bivalve mollusc. However further interrogation of the fossil: the shape, the fact that the growth lines are on one side of the shell but there is no sign of adductor muscle scars, palial sinuses or other characteristic bivalve signs, and the 'bobbled' texture on the plate, leads us to the conclusion that this is not from a bivalve.<br /><br />Rare examples of ammonite shells with aptychi preserved articulated have shown these plates to be located in the body chamber of ammonites. Upon death most pairs of aptychi disarticulate and hence they are found as single plates, such as this one.</div> </div> fingernail Jurassic smooth