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Showing results for tags 'orthocone nautiloid'.
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So, in a previous post, I asked for the identification of a piece of an orthocone nautiloid. The general consensus was that it was a Spyroceras sp, or related genera. Now, I have found two specimens, which show some of the characteristics that that piece had. I first thought that they were nautiloids, but since they both had the same general structure and orientation, I began to wonder if they are Conularids. The morphology does not seem right, namely the separation between parts of the internal mold and its large segments; but I am at a loss to think of something better. The two specimens are shown below. In the first picture, the first specimen is shown. I did not recover the other side of it, as I had to prep this specimen out. The bottom of the specimen is of the internal mold, while the top of it is of the external. The second picture is of a closeup of the top of the first specimen. The third and fourth pictures are of the second specimen. The third picture shows the external mold on the left, and the internal mold on the right. The fourth picture is orientated in the same way. The scale is in millimeters. Both specimens are from the Leighton Formation, Maine; which is Silurian, Pridoli. Thanks in advance!
- 13 replies
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- conularid
- fossil identification
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This is a another specimen from the Leighton Fm, Maine, Silurian. I uncovered it a while ago, and at first thought that it was a crinoid stem. On second look, though, I realized that the segments on the "stem" were curving inwards, instead of outwards. Furthermore, what I first that was the stem fading into the rock was actually the width and depth decreasing. I am torn between a Tentaculites sp., which is not known specifically from this formation but shows superficial resemblance to this specimen; and a small orthocone nautiloid, which is known from this formation. Any help on its id would be appreciated. Here are some pictures of it:
- 9 replies
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- 3
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- fossil identification
- leighton formation
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This is my first almost complete internal mold of an orthocone nautiloid. It is from the Leighton Fm, Maine. From the little I can see of the external mold, I believe it to have the same grooves as in the Possible Fossil Coral post, but I am unsure. Help on the general id of it would be greatly appreciated. Here are some pictures of it:
- 5 replies
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- fossil identification
- leighton formation
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