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Showing results for tags 'microfossils'.
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From the album: Triassic
Lungfish are an ancient group of fish, with swim bladders that evolution co-opted as a kind of "lung," allowing them to breathe air. This may have proven invaluable in a seasonally dry climate in Pangea.-
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- bull canyon
- bull canyon formation
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From the album: Triassic
From the "dawn" of the Dinosaurs, this small tooth represents an early theropod. Unlike the other serrated archosauriform teeth present in the formation, this tooth is ziphodont - thin and labio-lingually compresed - the archetypical tooth form that most theropods adhered to since their beginnings.-
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- bull canyon
- bull canyon formation
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From the album: Hell Creek / Lance Formations
Pectinodon (meaning "comb-tooth") is a tooth taxon, since no remains attributable to the genus beyond teeth have been found. Pectinodon seems to be a rare member of the Hell Creek fauna, with their teeth being fairly uncommon (though being so small, I'd guess that few people actively search for them). It was a small Troodontid theropod, with teeth that couldn't handle stresses as well as their Dromaeosaurid and Tyrannosaurid cousins (Torices et al. (2018)). This coupled with their small size suggest that Pectinodon was a small/soft prey specialist, preferring the rodent-sized mammals of the time, lizards, insects, etc. Some researchers have proposed omnivory as a possibility for Troodontids (cf. Holtz et al. (1998)). Troodontids famously are regarded as among the most intelligent dinosaurs for their large brain size / body size ratio. This notion serves as fodder for speculation that had the dinosaurs not gone extinct, Troodontids (Pectinodon being (one of?) the last) would have continued to grow in intelligence and develop sentience and civilizations. Troodontid teeth like Pectinodon can be easily identified by their small size, exaggerated, triangular, apically oriented posterior serrations.-
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- hell creek
- hell creek formation
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Hi there, I found this rock at Saltburn Beach (on the North Yorkshire Coast, UK) and it appears to be made up of some tiny round fossils approximately 3mm in diameter. Some have clear ridges running from the centre out and all appear to have a hole in the middle. There is a patch where they are together and form a longer cylinder, so maybe these are shell parts of a larger organism? I would love to know if anyone has any more information! - Eloise
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- microfossils
- saltburn
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From the album: Permian
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- helodus
- holocephalia
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Yorktown formation microfossils from Chippokes State Park in Virginia
MiguelM posted a topic in Micro-paleontology
Hello, Some friends and I went to Chippokes State Park in Virginia last week. The park is beautiful, and going down to the beach was very nice. We ended up settling at a sand bar formed at the mouth of the College Run creek. Although, we did not find anything too remarkable at first sight - other than lots of fossil oyster and clam shells - after sitting down for a bit we found our first shark tooth. With renewed hopes we kept scouring the area and found a couple more smaller ones - no meg big or small sadly... I did decide to bring with me a gallon Ziploc bag half full of material to look at under the microscope. So far, like halfway through the bag, this is what I've found that has called my attention. Smaller marks are mm on the scalebar. Just a couple of questions or observations: - I think the crab claws are not fossils, right? - Are these guys urchin spines? - What do you think this is? It has some symmetry, but I am not sure if fossil or fancy looking (little) rock. - Tiny tiny shark tooth, but what species? - I have no clue what these might be If there's anything else that catches your eye, let me know and I'll take better pics. I really want to start building a good knowledge of the fossils/micro-fossils of the Williamsburg-Norfolk area now that I live here and so far removed from my beloved Peace River. Thanks: Miguel M- 11 replies
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- chippokes state park
- microfossils
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Very small Cladodont (Falcatidae?) Tooth in Phosphatic Nodule ( Missouri )
Samurai posted a topic in Fossil ID
Location: Missouri Period: Pennsylvanian Formation: Iola Limestone (Muncie Creek Shale Member) Hello once again! Today I have a fossil tooth that I happened to have seen while going through my old phosphatic nodules from Muncie Creek and was wondering if anyone could identify it further than a Cladodont tooth. I have googled images of Cladodont teeth and believe it to possible be a tooth belonging to Falcatidae, but what do you think? It resembles a few of these teeth on the chart below in size and form, hence why i'm making the guess of it being a Falcatid even though my tooth has very slight differences in lengths of each cusplet. I will note that my specimen seems to have 6 cusps total, while the specimens below that it most resembles has 5. Here is the size in mm. The last thing I wanted to note is that it might be next to possible coprolitic material, although it's hard to tell as coprolites in these nodules looks very similar to just a phosphate center, although if you find inclusions its almost guaranteed. Example of an obvious coprolite and a not so obvious coprolite from these nodules.- 7 replies
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- cladodont pennsylvanian shark
- cladodont shark
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From the album: Aguja Formation
Small, freshwater shark teeth.-
- aguja
- aguja formation
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From the album: Aguja Formation
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- aguja
- aguja formation
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I recently collected from the Drakes formation on the west side of the Jessamine dome. I've been dissolving rocks, rinsing and then baking for about ten minutes in an old toaster oven. This is my outdoor laboratory. Here are some fossils. Thanks for looking.
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- conodonts
- microfossils
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From the album: Permian
^ Maho & Reisz (2022)-
- early permian
- microfossil
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From the album: Permian
Dimetrodon spines have a unique shape: ^ Brink et al. (2019) Many bones in the matrix I have appear to have bite marks - parallel grooves in bone. My amateur guess is that these are scavenging marks from a Dimetrodon carcass that got washed into a river and got chomped by Xenacanthid sharks (there certainly are other possibilities).-
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- early permian
- microfossil
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From the album: Permian
A freshwater cartilaginous fish with crushing teeth.-
- early permian
- microfossil
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From the album: Permian
The "sharks" that swam the rivers and lakes of the Early Permian wouldn't be fun to pet!-
- early permian
- microfossil
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From the album: Permian
I'm convinced it's a tooth, but not sure what kind. More images here.-
- early permian
- microfossil
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I recently got started sculpting digitally, and with this new hammer I am now excitedly looking for nails! My thoughts turned to some of my microfossils, specifically some of my really old shark teeth. Microfossils in general are difficult to appreciate without a microscope, so I figured it would be fun to sculpt a few. My first subject is a Devonian Phoebodont shark tooth that I thought looked neat enough. Besides being some of the oldest teeth I know of (380-390 Ma), they look very different from the teeth of modern sharks (except for those of the frilled shark). Most of the teeth are broken, but I luckily had enough fragments to get a good picture of what a complete tooth looked like. With these fossils as my reference I quickly squashed and shaped a chunk of virtual clay into a passable shark tooth: And thanks to the wonders of today's technology, I can actually share that model directly in an interactive manner: I didn't do so much work on the bottom since I intended to 3D print it. And after warming up the printer and waiting for 3 hours... I was able to do all this in an evening. I'm hoping to do more possibly throughout the Summer as my time and inspiration allow. There are a couple of other sharks I had in mind, but I'm open to crowd-sourcing suggestions/requests.
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- 3d printing
- art
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Hi y'all, I was thinking again about some Permian reptile teeth, I've seen them referred to online as 'parareptile,' but would like collective and/or professional insight. They are pretty distinctive, with a smooth labial face, and a striated lingual face. These are all from Waurika, OK (Wellington fm, Lower Permian). I have several examples, but they're not much different from these two. @jdp @dinodigger 3.5 mm tall: 2 mm tall: They vaguely remind me of a Caseid tooth, which has the same character of the striations/no striations (or I at least think this one is Caseid...). ^ Reisz (2019)
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- microfossil
- microfossils
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From the album: Post Oak Creek
Small "bamboo" shark teeth, about 1 mm tall.-
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- microfossils
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From the album: Post Oak Creek
Tiny sawskate oral teeth - less than 1 mm in size.-
- microfossil
- microfossils
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From the album: Post Oak Creek
The shell of a "foram" (test). It looks like a snail or ammonite, but is actually a marine protist (only found in the oceans).-
- microfossil
- microfossils
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From the album: Post Oak Creek
A small "bamboo" shark, just 1 mm tall.-
- microfossil
- microfossils
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From the album: Post Oak Creek
Various denticles from sharks and rays sitting on the face of a dime.-
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- microfossil
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From the album: Post Oak Creek
Rhinobatos teeth are so small they make me angry Here you see a dozen guitar fish teeth sitting on the face of a dime! The largest is a bit under 1 mm tall. R. incertus has a pointed crown, R. caseiri has no point.-
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- guitar fish
- guitarfish
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From the album: Devonian
- 3 comments
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- devonian
- devonian shark
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