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Showing results for tags 'denticle'.
Found 19 results
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My wife is active on facebook. I'm not. A while back I asked her to get someone fossils related off facebook for me. I guess she is watching and texted this.... Pretty neat picture. I had thought that the barbs were closer to the end of the tail.... Enjoy
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From the album: Aguja Formation
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Was the Early Miocene a second "golden age" for the Chondrichthyans
Joseph Fossil posted a topic in General Fossil Discussion
I recall not too long ago there was a pretty interesting scientific article published in the Journal Science describing how scientists analyzed the amount and diversity of chondrichthyan denticles in ichthyoliths from the North and South Pacific dating from around 20-19 million years ago and discovered a sharp drop in the number and diversity of denticles around 19 million years ago, indicating a massive extinction took place which took sharks 2 to 5 million years to somewhat recover from (it's still unknown if this impacted chondrichthyans worldwide or just in the pacific). Here's the paper:- 19 replies
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- south pacific
- pennsyvanian
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I found these back in January but apparently never posted them here (can't find any thread), I'm post mostly to my FB nowadays. I found these in about 30 minutes. They are typically assigned as "Petrodus" but who really knows. Years ago at this site I found teeth from at least 3 shark species including "Edestus". These are from the "Mingus Formation" I believe.
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From the album: Post Oak Creek
To find denticles, you need to go to the finest grain size. This beautiful one could be shark, but I'm not certain.-
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- microfossil
- sherman
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From the album: Muncie Creek Shale Phosphatic Nodules
Thanks goes to Connorp for the ID! -
This is a 1st for me, a denticle that is this thin, this large. I dimly recall hearing somewhere that these came from sharks, not stingrays. Let's see if some more knowledgeable than I concur. @Al Dente @MarcoSr@siteseer
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- bonevalley
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From the album: Moscow region Late Jurassic vertebrates
2 mm, Moscow, Fili Park, Volgian - Kachpurites fulgens zone -
Hi everyone. I found this little fossil recently while working through a sandy conglomerate matrix I brought back from this summer's hunt in Wyoming's Lance fm. I believe it's a dermal denticle from some variety of cartilaginous fish, my first guess would be the Hybodont shark Lonchidion, but the guitarfish Myledaphus is also incredibly common in these sediments, however I haven't seen any pictures of denticles belonging to the latter or close relatives. It's about 2 mm long and about 1.5 mm tall. I would love to hear some input. Thanks, Noel
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I'm happy to announce i possibly found the most complete Listracanthus to date. And we may finally get a proper ID for this strange creature. I thought this was regurgitation, but while prepping i believe i ran into cartilage. So i will stop prepping and give this to a professional, or at least let someone with more experience look at this. Unfortunately the rest is in a giant wall of black shale that i won't be able to get back to until next Spring/Summer. The denticles are up to 6mm thick and associated with smaller denticles. I will get more pictures under a scope
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- listracanthus
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Listracanthus denticle?, then another or different altogether?
Bonehunter posted a topic in Fossil ID
Hi all! Well, now I am into splitting shale finding conodonts and will post my best ones soon, but I've come across several of these which are comparable to images in the forum and on references to Listracanthus denticles?. It was found in Pennsylvanian Stark shale member in Kansas City two days ago. Is that a fair i.d.? They're are all very similar, but I've found this as well- a "carbonized" film with a structure that doesn't have straight lines, but somewhat veinated? Very difficult to get pics of that so provided several in different light. The first is 27mm long and the black p -
I was going over some of bits of Permian micro mix from the Neva Formation in Kansas and I found a fossil I had come across in my initial search months ago. I recently looked at a publication on Permian sharks from Russia. I remembered seeing something similar in that publication. It was a monocuspid denticle attributed to Cobelodus and I can not help but wonder if our mystery fossil is chondrichthyes denticle of some sort. Any thoughts ?
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When hunting the Peace River, I find some - many Ray dermals of this general form (not quite as pristine as these phosphate mine versions: I have been finding more of the little "buttons" recently, maybe 5-10 a hunting day. When in the productive areas, I find lots of these which I always thought of base plates for attaching bottom of Ray spines. The I ran into something that I have definitely NOT seen previously. Less than the size of a penny. So, what is this and , am I moving back or forward in time comparing this new arrival with
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Originally from the Midwest, I've been hunting for fossils for about 50 years and found about two "fossilized sea shells". And this was not from a lack of trying! I moved to Summerville, SC about three years ago for a job that included lots of travel. Now that travel is finished and meeting new friends in the area, I have connected with some kids that stumbled onto something that I think is big! Had I grown up in Summerville, I probably would have change my career to paleontology instead of Electrical Engineering. I am amazed at the finds here in my home town. I have taken my wife
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More from Sacha's Merritt Island micro matrix...anyone out there know what this is? Thanks much!
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From the album: Unusual Shark Teeth
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I found these bad boys everywhere on the beach, but who do they belong to?
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I believe this is a partial denticle. Does anyone know what shark or ray it would have belonged to? It was found in a Late Maastrichtian clay in Arkansas.
