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Jon Moore posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi Jen, I’m not sure about the higher taxonomy. Toxasteridae does seem to be the commonly used family for this genus, but at least one document said that family is paraphyletic. I didn’t photograph the oral side, because it was not completely cleaned of matrix, but I can try to clean the specimen and then take a pic.
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Jon Moore posted a new specimen. 4 years, 9 months ago
4 years, 9 months ago4 years, 9 months agoJon Moore has contributed specimen mFeM 57113 to myFOSSIL!
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Hi, @jon-moore – is Toxasteridae the family or is there some disagreement about that? I know some of the higher taxonomy can be a bit complicated. Here is an occurrence I found from iDigBio: https://www.idigbio.org/portal/records/1f57e28a-dda9-444e-b368-e8a22b19f74c
I also found really nice images on the Echinoid Directory:…[Read more]
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Hi Jen, I’m not sure about the higher taxonomy. Toxasteridae does seem to be the commonly used family for this genus, but at least one document said that family is paraphyletic. I didn’t photograph the oral side, because it was not completely cleaned of matrix, but I can try to clean the specimen and then take a pic.
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Ah, yes, the common issue in fossils – figuring out what is paraphyletic or not. A never ending problem across all of life!
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Jon Moore posted an image in the group Imaging and Digitization for Amateurs Workshop from the myFOSSIL app 4 years, 9 months ago
4 years, 9 months ago4 years, 9 months agoHandy pseudofossil
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Jon Moore joined the group Imaging and Digitization for Avocational Paleontologists Workshop 4 years, 9 months ago
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Jon Moore posted a new activity comment 4 years, 11 months ago
4 years, 11 months ago4 years, 11 months agoThank you Sadie and Victor! Cylindracanthus does indeed look like the specimen. Still having troubles believing it is rostrum, given how hollow and thin-walled my specimen is. I am more inclined to think spine of some sort. Some interesting hypotheses floating around in the literature on Cylindracanthus. But at least I now know what to call it.…[Read more]
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Jon Moore posted an update in the group Florida’s Fossils 4 years, 11 months ago
4 years, 11 months ago4 years, 11 months agoHey folks, I could use some help identifying this fossil. Purchased from a vendor who said it was a fish rostrum from Eocene deposits, collected in Taylor County, FL. Problem is, it doesn’t look like any fish rostrum to me. It is hollow, cylindrical, with longitudinal ridges running the length of this fragment on all sides. So, any ideas?…[Read more]
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Hi @jon-moore, I’m going to tag several people who work with Florida fossils in case they have any ideas on what this is! @jeanette-pirlo, @vperez, @smoran, @rnarducci, @charlie-smith @cindy-lockner, any ideas on this fossil? Thanks!
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It is from a genus of extinct fish called Cylindracanthus, which can be found in Florida. They lived from the Cretaceous through the Eocene, so it seems likely that the information you got from the seller is accurate.
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Thank you Sadie and Victor! Cylindracanthus does indeed look like the specimen. Still having troubles believing it is rostrum, given how hollow and thin-walled my specimen is. I am more inclined to think spine of some sort. Some interesting hypotheses floating around in the literature on Cylindracanthus. But at least I now know what to call it.…[Read more]
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Jon Moore joined the group Florida’s Fossils 4 years, 11 months ago
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Jon Moore joined the group What is it? 4 years, 11 months ago
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Ah, yes, the common issue in fossils – figuring out what is paraphyletic or not. A never ending problem across all of life!