Mainefossils Posted March 2 Share Posted March 2 Fossil forum, This is another fossil from the Leighton fm. I have just uncovered it, and at first thought it was a trilobite cheek. On closer inspection I realized that the external and internal mold are not smooth, but appear slightly porous. As well as this, the ridge appears too high in both molds. Any help on its id would be appreciated. Here are some pictures of it (internal mold on the left, external on the right): Link to post Share on other sites
Fossildude19 Posted March 2 Share Posted March 2 Not sure there is enough there to make a determination, but it looks more like where the thorax meets the cephalon Occipital lobe/or posterior border? Image from Trilobites.info. 1 1 Link to post Share on other sites
Nautiloid Posted March 2 Share Posted March 2 I agree with Tim that it looks like either a piece of a thoracic segment or the occipital lobe Link to post Share on other sites
Mainefossils Posted March 2 Author Share Posted March 2 That makes sense. I was really puzzled by the porosity of the surface on the external mold - is that normal? Link to post Share on other sites
Kane Posted March 2 Share Posted March 2 1 minute ago, Mainefossils said: That makes sense. I was really puzzled by the porosity of the surface on the external mold - is that normal? It is for some species, and for certain types of preservation. Link to post Share on other sites
Mainefossils Posted March 2 Author Share Posted March 2 33 minutes ago, Kane said: It is for some species, and for certain types of preservation. Thank you! Link to post Share on other sites
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