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Showing results for tags 'jawless fish'.
Found 8 results
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Authentic osteostracans from Spitzbergen?
Amontano posted a topic in Is It Real? How to Recognize Fossil Fabrications
Can anyone help me with if this looks like an authentic collection of head shields from boreaspid and cephalaspid ostracoderms? Seller states the species are Spatulaspis, Boreaspis and Cephalaspis. Not sure about the identification of Spatulaspis based on morphology but I've also personally not seen ostracoderms with such detail and wonder if their quality is too similar to the matrix. The stated locality is from Wood Bay in Spitzburgen which fits with Boreaspis and Spatulaspis. I would love to add a beautiful assemblage of stem gnathostomes to my collection but am not positive about the authenticity. Would appreciate any thoughts!
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- agnathan fish
- devonian
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This looks similar to some jawless fish bone I’ve seen. Could this be some? Ordovician, Wisconsin, Dane county, Madison.
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Hello! I found these fossils(?) at Estabrook park which is part of the Devonian Milwaukee formation. They appear to be external moulds. These were found near the Lindwurm and Berthelet Members. Are these jawless fish? Big brachiopods? Non-fossils? I’m stumped on these. The formation is known for its plants, giant fungi, jawed and jawless fish, Cephalopods, and Conulariids. So sorry for the lack of scale! I need to start carrying a tape measure with my fossil hunting backpack.
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Never seen this texture on a brachiopod or bryozoan before. Found in Wisconsin gravel.
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I’m legitimately lost as to what this could be. Devonian, Milwaukee formation. Fish tooth plate?
SilurianSalamander posted a topic in Fossil ID
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I found a new place to fossil hunt and it has many more fossils then the normal places I go. Lots and lots of coral, brachiopods, cephalopods, and crystallization. It honestly looks like a coral reef of some kind. I live in middle Tennessee and it's mostly Mississippian and ordovician in my area but there are some areas of Silurian-Devonian. I found this fossil first and thought it was some sort of larger cephalopod, but there were some strange things about it and I started to change my mind. It is a torpedo shaped fossil with crystallization. I will start with the pattern pictures first to show you what I mean and then I will post a picture of the whole thing with a size reference. There are spots distributed around it but they seem to be symmetrical on both "sides," some are clearer than others. There are scalloped edges on the "bottom" of it. There is also an upside down shaped V at the "front-bottom" of it that I think looks kind of like a fish jaw. I do realize that if this is a fish it is very rare for this time period, especially in this sort of shape. If you do believe it is a deteriorated cephalopod, if you could just explain the V shape and the spots, that would help me see it as well. Thanks
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Now you guys can criticize me all you want with this theory, it’s just something I have thought of for a while. My theory is that hagfish (weird jawless fish with a primitive skull and no backbone) are in fact late surviving conodonts ( proto vertebrates from the Cambrian to late Triassic). First their Anatomy is very similar, a long eel like body, jawless appendages, and weird proto skulls. Another thing that’s supports my theory is that conodonts could have swam to deep water to escape environmental extinctions. So living in pitch dark water they lost their eyes but developed better olfactory senses to detect dead body’s and scavenge on them. It also explains why the conodonts in the deep sea are still alive because generally deep sea organisms are better at surviving mass extinctions. Another point is that hagfish are known from the Carboniferous, which is when conodonts were around, which could suggest that hagfish are just a family of conodonts. So yeah consider my theory, and write in the comments if you have any criticisms. Remember this is a theory I have had for a while.
