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  1. ThePhysicist

    Hell Creek collage

    From the album: Hell Creek Formation Microsite

    A representative sampling of the diversity captured in microsites - everything from Tyrannosaurus to mollusks.
  2. Hi all, Following up from my previous thread (https://www.thefossilforum.com/topic/139153-sea-urchins-sand-dollars-and-brachiopods-aireys-inlet-victoria-australia/), I returned to the same site (Aireys Inlet, Victoria, Australia) and closely inspected the fine, freshly eroded material on the sandstone platform/overhang (presuming ~20-25Mya), finding a number of interesting semi-micro fossils (1-5mm in size). Would appreciate any thoughts and ID! Will post in separate posts for clarity. First off, this beautiful little echinoid, ~3mm in diameter:
  3. Greetings fossil friends, I found a very small jaw bone fragment with teeth. Found in Sarasota county while beachcombing the Intercoastal waterway. It is spot that produces fossils, but I think it may be modern. It is approximately 3/4” long (19.05mm) and .25” (6.35mm) thick. please help ID. Many thanks! -Marie
  4. bockryan

    Embryocrinus sp.

    From the album: Fossil Collection: DC Area and Beyond

    Embryocrinus sp. Basleo, Timor Sonnebait Series Permian
  5. SharkySarah

    Moscow formation micro fossils

    sorry in advance. Not sure why the photos uploaded so out of order. From Erie county New York. Any thoughts? A and B. Crinoids C. I think just mineral bits D. Ostracods! No idea how to identify them E. Modern shell F. Bryozoan G and H. Not sure I. Tentaculites? J. Just a pebble? K. Crinoid? L and M. Not sure N. Shell?
  6. So having got even more obsessed with micro matrix lately, I now want some from California and some from Aurora! Also would take some Calvert Cliffs micro. Anyway - haply to trade Florida micro matrix for it, or some other Florida fossils!
  7. Well, I got tricked by my micro matrix from the Texas Cretaceous North Sulphur River! I found this and thought I had found an Onchopristis dunklei sawfish rostral! It sure looked like one until I got it under the actual larger microscope camera and realized ......it was just a broken shark tooth. Wah wah. What I found : What I knew Onchopristis looked like and you can see the similarity in shape! Except the barb is on the wrong side.... And as I always tell newbie fossil finders....shape alone does not a fossil make... And another of my favorite Faux-sils is this that I thought was a big crab claw and I admit....quite disappointed that it wasn't! So show us your "Tricksy" fossils!
  8. Hi, JP. I saw your comment on another thread, and decided I would try it out on some White River micro matrix I have been working on, and it works pretty well! Much faster and easier! Just thought I would share some pics of the teeth I have found so far: My brother actually found a small lizard jaw sitting on top of the micro matrix. The lizard jaw is near the center of the container. I have searched through probably less than one gallon of sifted micro matrix. And to me, that seems pretty good! Cheers and Shalom, -Micah
  9. JamieLynn

    Oklahoma Silurian Micro Oddity

    Found this odd little thing in my Micro matrix I brought back from Oklahoma - Silurian Henryhouse Formation. It looks crinoidy, but I know there are starfish that can be found in this formation too. Any thoughts? Aprox 1/4 inch
  10. I think these are fish teeth. Can that be confirmed and can any of them be identified further? Happy to provide additional view of any, if that would help. Grid lines are 1mm spaced. • Is T11 Chondrichthyan? • Could T12 actually be a stingray dermal denticle?
  11. debivort

    Is this a dasyatid tooth?

    Is this a dasyatid tooth? It seems different from the others I'm finding in this micro matrix. Grid lines 1mm spaced.
  12. Here's a drum fish tooth lodged in a curiously shaped piece of host matrix. Smooth, cylindrical with a potential spiral groove. What do y'all think? Grid lines are 1mm spaced.
  13. Processing some micro-matrix from a creek here in Florida and I've come across a number of tiny chondrichthyan (assuming shark) teeth that are rather odd and defy my efforts to classify them (not really all that difficult). You can see from this gallery of 9 teeth that they tend to have fairly thick wide roots (when they are not eroded away). The enameled crown is wide at the base and has a single cusp that is curved becoming nearly parallel to the root base. Often, these oddly shaped smaller teeth end up being odd symphyseal (or parasymphyseal) teeth of a more common species since teeth in this position are often quite different from the others surrounding it. That might be the case here or this might be a "normal" tooth from some less common species. You'll notice from the scale that these teeth are all 2-3 mm in various dimensions so they are really micros. I spent some time today photographing this group from a few angles to send out to several places with hopes that someone recognizes this. Anybody here ever encounter something like this while picking micro-matrix? Would love to be able to put an ID to these little oddities. Cheers. -Ken
  14. Hi all! I've not really been up to par on my ID lately, so I am now second guessing myself! So I would appreciate some confirmation on these little teeth from the Aguja Formation. Thanks for any help! First one -I hope hope hope that it's what I think it is. But heck, it might not be! I think this is an ankylosaur tooth. It's aprox 1/8 inch Now, I am certain this is a hadrosaurid tooth but the next one I am not so certain about. It doesn't have quite the same structure Hadrosaurid These I am not sure are Hadrosaur 1. 2,
  15. In 2lbs of Peace River micro matrix, I found 415 shark teeth, of which 90 seem potentially identifiable. Here they are in different categories. Grid lines are spaced 1mm apart. I can get additional views of any teeth as warranted. A: Based on my experience with larger teeth, would call A1 as hammerhead. A2-A5 share many shape characteristics, but are they Rhizoprionodon? B1-B14 Carcharhinus, I believe. C1-C21 seem like lemon, Negaprion. D1, D2: posterior Galeocerdo tiger shark? E1-E5: These may all just be mostly-root fragments of Carcharhinus, and reflect a common pattern of breakage? But they were a "type" that emerged in the sorting. F1, F2: Snaggletooth G: This group contains a very common morphology I found, a blade with a single cusplet on the posterior side of the tooth. Most have roots that look broken. So maybe we're dealing with a lot of Carcharhinus that all broke in a similar way? Most of the blades show little or no sign of serrations, but maybe that's weathering (or juvenile teeth?). I am pretty unsure about these. G8 and G9 seem somewhat sand tiger like. Are many of these G teeth Rhizoprionodon? H: the odd singleton teeth. Some of these may be too weathered to ID. H1, H6 have similarities to some thresher teeth I have found. H2 seems potentially sympheseal H3 contortus? H7,8,9? lemon? too weathered to ID? H4 interesting cusplets, but I have little sense of ID H5 seems like it could be a sand tiger H10 lemon? H11 Carcharhinus with no serrations on the blade? H12 interesting, but ?? H13 interesting, but ?? H14 sand tiger? H15 thresher? H16 interesting, but ?? And for the sake of completeness, here are all the teeth I deemed not worth trying to ID: If you see anything worth closer inspection in there, I'll grab photos:
  16. In two lbs of Peace River micro matrix, I identified these 8 items as fish vertebrae (+1 discovered in the "coral" pile). Grid lines are 1mm apart. Are the bottom and right pieces on the lower row eroded shark (or ray) verts? I also sorted the item below into the vert pile, but upon photographing it, I became less sure. Instead of having a half-round profile when viewed end on, it was more linear, like a cannoli shell. Unfortunately, it popped out of my forceps before I could take photos of other orientations, and now it's lost forever. But on the off chance these two photos are enough for an ID, here you go:
  17. Are these solitary corals? Grid lines are 1mm.
  18. [edit: TLDR: DD1-DD13 are denticles. Everything else is likely not.] Here are the candidate shark dermal denticles from my Peace River micro matrix sort (grid lines are 1mm): • DD1-DD13: quite certain in the ID, but can the species be identified? • DD14-DD19: Less confident about these more idiosyncratic specimens. DD16 might just be very worn, or possibly just a lookalike piece of phosphate. might DD17 be a steinkern? Its ridges seem shaped like the other denticles, but the material appears different. Additional idiosyncratic specimens, two orientations each. I am uncertain if they are denticles: • DD20 seems to have ridges, but texture is rough • DD24 has a promising profile, but ridges aren't obvious • DD23 has a rough "base," visible in the lower shot, and overall conical form. What do y'all think?
  19. Thanks to a fellow forum member, I was able to get my hands on a few pounds of Peace River micro matrix material. I hope to bring a number of items from it to y'all for ID help, starting with this tooth-like conical item. Grid lines are 1mm.
  20. The water level in a close by river has been the lowest I've seen in years... we're definitely experiencing a climate shift here in Central Texas. Even with some recent rains, the river is not regaining its normal levels. While that is indeed a sad state of affairs, it has made for some good fossil hunting....sooooo....Silver lining? I have found 6 little tiny outcrops of the blue grey mud that I recognize as Del Rio Formation, a great surprise when this area is typically Georgetown Formation and Glen Rose Formation. So of course, I dug up ALL OF IT that I could. I've been back three times and I think I got it all! Kinda sad that I got it all though. It has provided some great hours of Micro hunting! I finally bought myself a little camp shovel! It has proved invaluable! These little patches have yielded some amazing fossil. They are chock full of the cormatulid crinoid Roveocrinus signatus. These are all around 3 mm or 3/16 inch They are very varied: My other favorite thing to find are the myriad of crab claws, and occasionally was lucky to find both digits together. All of these are around 1/8 inch Another favorite is of course....starfish! While I have yet to find the actual central body of the brittlestar Ophiuria sp. , I have found LOTS of bits of legs and individual parts. Not much ammonite stuff, but I did find something quite special - this little fragment of Anisoceras sp. And this little unidentified ammonite. I did find one whorl of the heteromorph ammonite Mariella (which are common in other Del Rio outcrops) but it was not well enough preserved to merit adding. Also a couple of not very well preserved shark teeth- probably Leptostyrax And of course, lots of tiny gastropods! Probably a Fusus sp. Gyrodes biangulata Nerinea volana Cerithium texana Unknown Gastro probably a Turritella of some sort and not a fossil, but a nice little Pyrite rose
  21. aek

    Holocene micro fish parts

    Wondering if these tiny fish fragments can be identified? These are about the size of a grain of sand about 8-10,000 years old ancestral Lake michigan.
  22. Been doing some micro matrix picking lately, and I came across this tooth. First thought was lemon, but the root is throwing me off. Shape doesn’t seem right for a lemon. @hemipristis @Al Dente @MarcoSr I’d love your help! Size is like… 2mm if that.
  23. I was wondering how you display your small dinosaur teeth? I was conserding Gem Jar cases. I just got a small dutch mosasaur tooth and some perfecr abelisaurid sp. crowns & and as I continue my fossil teeth expension. I'd like to give them the display they deserve. How do you guys and girls do it? Please show some pictures and tips! Would be greatfull!
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