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Found 5 results

  1. Fullux

    Aegirocassis?

    I've been fascinated with Aegirocassis for a while now. The fact that a complex, giant filter feeder occured so many millions of years ago astonishes me. Its just such an alien animal. I've found little fragments of arthropod molts in the Drakes formation which belong to Isotelus. That got me wondering. What are the chances that instead of these all being from isotelus, that they're instead from another arthropod such as a eurypterid or ordovician radiodont. Another question I have is, does aegirocassis or a radiodont related to aegirocassis occur in any places other than morocco. The Drakes formation seems to have experienced a submarine landslide (don't quote me on this) and most to all of the fossils there are of creatures that were overtaken by said landslide. (Not entirely sure if this is true) But, what if there were such radiodonts like aegirocassis living in the Drakes formation but the only fossils we would find of them is molt fragments like the ones I've found that fell off of the animal and were buried in the sediment, instead of whole body fossils because they were able to escape this landslide. Though, I suppose the only way to confirm that such a radiodont lived in the Drakes would be to find an actual fossilized corpse of one. Really I just think this is a fun idea but it definitely would be cool if it is true.
  2. Kurufossils

    Mystery Huge Anomalocaris Appendange?

    Hi, I have this mystery piece of what appears to be anomalocarid appendage of sorts. The problem is I did not receive any information with it and it came out of an old collection from Maine, Usa. I'm not to sure what else it could be from the appearance but I am also very uncertain of the exact species. The piece of a very laminated sparkly shale If I had to guess it could've came from either Burgess Shale, Utah, or Nevada but I not sure what locality it could be from so if anyone if familiar with these shales and can tell from the preservation it would be a huge help, thank you and looking forward to seeing peoples opinions, and if anyone can recommend an expert to show that would also help.
  3. I am sorry for the length of this txt. I am looking for help verifying the ID of a fossil I've been finding for close to 20 years now. It is a very dificult to see poorly fossilized shrimp or trilobite like creature that everyone I've spoken to tells me can not exist. I am having a dificult time getting pictures that people on other sites will take seriously as the lines defining the structure of the creature are nearly undistinguishable from the stone itself. Everyone wants to call it pareidolia and say there is nothing there. Four or five individuals I've spoken to, whom have taken the time to actually look at it have seen it after I've pointed it out several times and sketched over a picture. They eventually get the typically *holy snarge I can see it look and then go on to profess they have no idea what it could be. So it seems that some people are capable of seeing the same things I do. But honestly I'm tired of people proclaiming to have degrees treating me like I'm some spoiled child when they can't see it so I am flat out refusing to posting pictures and an explination of it unless I one; can get an explination as to why it's a natural formation and why rocks with natural formations have markings that exactly resemble the cells of chitin found on modern crayfish and lobster, or I get someone with true knowledge who can explain something about what I'm looking at. I started recognizing this in local stone almost 20 years ago. No one I have showed it to in all that time has so much as come up with a guess as to what it might be. Most can't see it at all, though it takes no special ability to do so. It just requires a maticulous attention to detail. And a willingness to believe that there are things in the world that have not been discovered yet. This is a thing that has been discovered, and is actually fairly well known. But noone believes it can fossilize in this format. And their is no mention of it ever being found in this location before. I'm not willing to argue with anyone about it's validity as a fossil. It is organic and it is a fossil unless you can explain as I've mentioned above. I will not accept any other answer period! That may make me sound uncooperative and hostile I apologize if that's what you see or think. I'll do everything in my power to explain what I'm seeing and get you to see it as well. But I'm done making enemies by refusing to accept that this is not a fossil. Either work with me and help me prove it. Or don't. But if you act like the teenagers on other sites I've made the mistake of looking for answers on I don't need your input. That said I've seen nothing but courtesy and respect from the people here so far so I'm going to try this one last time. Please respond if you are interested and I will post pictures and explinations as I have them as a new topic under this one
  4. When faced with a radiodont appendage fossil; How does one effectively determine which slab contains the "part" or "counterpart" ? For reference, here's the holotype Pseudoangustidontus appendage. The first pic, Figure A, is apparently the positive(?) "part" of the fossil. Whilst the second pic, Figure C, is apparently the negative(?) "counterpart". Like it's easy to tell the difference between an impression/cast, or the actual fossilised remains for hard-bodied specimens like shells, exoskeletons and bone. But for some soft-bodied organisms, it's especially difficult when both slabs seem to preserve both the impressions and the fossilised remains of the organism, as in the case with the Pseudoangustidontus holotype. I've also heard that concavity of the matrix usually helps in identification; but thin and soft-bodied specimens often just leaves a planar imprint, so judging by relief might not be too reliable either. Any thoughts on this matter?
  5. Meet Cambroraster falcatus, the sediment-sifting ‘Roomba’ of the Cambrian This crustacean-like critter stalked the seas half a billion years ago. Katherine Wu, NOVA,, July 30, 2019 Moysiuk, J. and Caron, J.B., 2019. A new hurdiid from the Burgess Shale evinces the exploitation of Cambrian infaunal food sources. Proceedings of the Royal Society B, 286 (1908), p.20191079. Open access Proceedings of the Royal Society B PDF Brantford Lapidary and Mineral Society PDF Sun, Z., Zeng, H. and Zhao, F., Occurrence of the hurdiid radiodont Cambroraster in the middle Cambrian (Wuliuan) Mantou Formation of North China. Journal of Paleontology, 1(6), p.2. More research by Fangchen Zhao Liu, Y., Lerosey-Aubril, R., Audo, D., Zhai, D., Mai, H. and Ortega-Hernández, J., 2020. Occurrence of the eudemersal radiodont Cambroraster in the early Cambrian Chengjiang Lagerstätte and the diversity of hurdiid ecomorphotypes. Geological Magazine, pp.1-7. Open access Pates, S., Botting, J.P., McCobb, L.M. and Muir, L.A., 2020. A miniature Ordovician hurdiid from Wales demonstrates the adaptability of Radiodonta. Royal Society Open Science, 7(6), p.200459. Open access Yours, Paul H.
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