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Showing results for tags 'exoskeleton'.
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Location: Missouri Time period: Pennsylvanian Formation: Muncie creek shale Hello! I was hunting in one of my favorite spots and saw a very weird structure coming out of a Muncie Creek Shale nodule and what I think it could possibly be is a piece of crustacean exoskeleton! If I'm lucky that is! I am not exactly sure why I know its different but it does not look like crushed shells from other brachiopods in the area and looks to be layered horizontally. My personal theories: Weirdly preserved Brachiopod, Crustacean Exoskeleton, Natural formation that I have not seen in the area before or something else entirely. I would love to know any information and would love to use this as a learning experience! Size: 3.4cm Images in their natural sizes (Not compressed): https://imgur.com/a/8c3o4Jd
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- crab
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Sorry about the tag ambiguity but I’m at a loss. This was recovered from an old fossil collection sold retail in about 1955. Any ideas would be helpful. Family? Genus? species? US Penny (and cat hair) for scale. Thanks, Glenn
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- bilateral
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The great looking trilobite @Greg.Wood prepped and posted has raised questions for me. Where did the hard, calcitic, exoskeleton end and the soft under body begin? How was this transition accomplished with a hard mineral? In the below picture of Greg's bug, you will see the segments appear quite flexible. I realize there has been some compression when it was buried, but if the exoskeleton is as rigid as presented in the literature, shouldn't it have broken off rather than bent? The circled area on the left shows a "rind" on the segment. Is this part harder than the rest of the segment? (circled area on the right) Hope someone can point me to some literature. Thanks! @piranha @Kane
- 6 replies
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- exoskeleton
- segmented bodies
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I got a question. Is there any evidence from fossilized remains indicating that trilobites could had consume parts of their exoskeleton to replenish the calcium? Crayfish, Crabs and some other arthropods do so. So what do you think?
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