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Found 3 results

  1. LordWampa
    Hello I will tag you @piranha as I think you are the trilobite master. This is not a typical I have a fossil to ID post, is more why I see to different trilobites often tages as drotops armatus. What I am missing? Is there an explanation? When I think of a drotops armatus, this is what I typically expect. The main thing I see here is kind of long spikes and in the center section of the trilobite, the spikes are in pairs. But then, you sometimes find this also labeled as Drotops armatus: I did some research and seems to be 4 subspecies or forms? D. armatus Struve, 1995 D. a. accurata Struve, 1995 D. a. perspinosa Struve, 1995 D. a. armata Struve, 1995 D. a. hoplites Struve, 1995 But I can't find more information. Is there some paper or place where this is described? I can't find the original paper
  2. Eye in the Sky
    Recently, a group of paleontologists were having a discussion regarding fossil shells after a woman produced one for identification. Discussion turned to the difference between a shell and a fossil shell (that being a shell which has permineralized). There was debate as to whether or not there are any shells that are older than any fossil shells in the general paleo record. One of the paleontologists knows a shell expert and she reported back that the oldest known shell is approximately 18,000 years old and that all shells older than that have permineralized. However, some found this difficult to believe, as shell material, being mostly calcium carbonate, should be able to survive for very long periods in non-acidic deposition environments. Can anyone confirm this? Thanks!
  3. angeliquemnc
    I am attaching pictures of what I have found to help aid in this question. Thank you in advance!
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