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Found 512 results

  1. I came across this website with surprisingly cheap dinosaur footprints. This is one of the grallator footprint plates they are selling. It claims to be real and only darkened to make the footprints more clear. They say it is from Mt. Tom Massachusetts. They only give one picture though per item. .
  2. Could these be bones from Aust Cliff?

    Hi, I went to Aust cliffs today. I brought back some material, and noticed these. Could they be bone fragments? They are probably not identifiable, but I think if they are bone fragments would most likely be from an Ichthyosaur or Plesiosaur. I think the one on the right isn't a bit of bone, rather an interesting bit of rock. Many thanks.
  3. New burrowing Drepanosaur discovered among Arizona's petrified Forrest https://www.latimes.com/world-nation/story/2020-10-15/researchers-discover-fossils-of-new-species-in-arizona
  4. Love my new neighbor!

    My new neighbor (mile away but still the closest) rented an end loader and volunteered to move two of my biggest rocks! Both safe in my collection. And even better, went up the side of the wash about eight feet and found tracks. Could be the edge of the undisturbed fossil layer.
  5. Took some pictures of the chirotherium tracks. Have quite a few with a front and rear together.
  6. Large Ichthyosaur Vertebra, Penarth, Wales

    Hey everyone, I recently acquired this ichthyosaur vertebra that was originally collected in Penarth, south Wales, UK. What initially struck me was the vertebra's size, since it's by far the biggest one I have of any ichthyosaur: Now, other large ichthyosaur remains have been described from the very same location. The paper is freely available here: https://bioone.org/journals/acta-palaeontologica-polonica/volume-60/issue-4/app.00062.2014/A-Mysterious-Giant-Ichthyosaur-from-the-Lowermost-Jurassic-of-Wales/10.4202/app.00062.2014.full The cliffs at Penarth apparently contain multiple exposures of different formations, which can make assigning isolated remains from there to any one time period problematic. The authors tentatively date the bone described in the paper to the lowermost Jurassic based on attached matrix and microfossils it contains. Finding references for the sediment of each formation from this locality is tough, but the matrix on my vertebra resembles that in the paper at least superficially. I have tried contacting Dr. Peggy Vincent, a co-author of the study who works on Jurassic marine reptiles from Europe, but sadly no luck thus far. My questions are: - Are there any features that might help date this fossil to a certain time period, or identify the formation it originated from? - The authors of the study assign their fossil to Shastasauridae - are there any features that can identify this vertebra on a family level? Thank you for your help!
  7. This one is too big to move

    8’ long, 32” wide. Excellent sets of tracks. Need a backhoe to move this one. Late in the day so pics are a bit shaded, sorry.
  8. Love this set of prints

    Found this yesterday. It was a bit out of the water flow so it hasn’t been eroded much. Nice distinct prints.
  9. More nice prints. One unknown

    Nicely defined toes with claws. I guess you could call them sandy claws. Catch me at your local comedy club! Second picture is taken under a rock I’ve tunneled underneath but I have no idea what the print is from. It’s about 2”.
  10. ...an egg or a simple rock

    Hi, Found something resembling an egg in a field. The area is Jurassic inferior/Triassic. It's not the best pictures but if you aren't sure i can take more in the morning. Can you identify it for me?
  11. Skin impression

    Found a messy chirotherium footprint but has skin impression with it.
  12. triassic cowpatie

    I found this rock when i went to an old triassic quarry where footprints have been found. did not find any footprints, found some little hollow molds of shrimp like creatures (malocostraca- phyllocarids?) ( orange is the impression of the hollow) and a couple of these cow pat shaped rocks. Is it just geological?
  13. The summer haul

    One summer, tons of sand and rock and twelve pairs of gloves later. Should have just moved the house to the fossils.
  14. Some new tracks

    Been mostly clearing out sand but did find a nice rock yesterday. Don’t know what the splayed toe print is.
  15. I enjoyed a productive weekend hunting petrified wood in the Triassic age, approximately 210 mya, Newark Supergroup of Pennsylvania. The first 2 photos show a single specimen's 2 sides, illustrating profuse checking in the wood, and a likely rotten dead limb knot at top. Specimen weighs 19 pounds.
  16. Phytosaur Tooth ID: Redondasaurus?

    Hi. I was wondering if anyone could help me narrow down the identification of this phytosaur tooth. Is it possible to determine the genus or species from just a tooth? I think Redondasaurus may be a potential match, but it looks like there are a few archosauriforms in the Redonda formation. Thanks for any help. Phytosaur Tooth Triassic, Norian Redonda Formation Quay County, New Mexico CH: 32 mm CBW: 11 mm CBL: 12 mm Distal: 3 serrations/mm Mesial: 3.5 serrations/mm
  17. Theraspid Hibernation?

    An interesting paper on the proto-mammalian Lystrosaurus and tusk measurements that might indicate seasonal hibernation/torpor. https://www.nature.com/articles/s42003-020-01207-6
  18. A new paper is out online that you'll find shocking: Müller RT, Garcia MS. 2020. A paraphyletic ‘Silesauridae’ as an alternative hypothesis for the initial radiation of ornithischian dinosaurs. Biol. Lett.16:20200417. http://dx.doi.org/10.1098/rsbl.2020.0417 I remember that several Late Triassic animals erected upon teeth (Crosbysaurus, Galtonia, Krzyzanowskisaurus, Lucianosaurus, Pekinosaurus, Protecovasaurus, Revueltosaurus, and Tecovasaurus) were once classified within Ornithischia because the type teeth of those taxa are similar to those of ornithischians (some early sauropodomorphs have leaf-shaped teeth, too), but Revueltosaurus was later reclassified as an extinct relative of alligators and crocodiles based on complete material, and Galtonia and Pekinosaurus were also recognized as suchians closely related to Revueltosaurus, meaning that other putative Triassic ornithischian taxa from the American Southwest were placed in Archosauriformes incertae sedis by Parker et al. (2005) and Irmis et al. (2007) due to the presence of triangular leaf-shaped teeth being convergent among ornithischian dinosaurs and some non-dinosaurian clades. The hyper-sparse record of Triassic Ornithischia left people scratching their heads to explain the paucity of Triassic ornithischian fossils, with some speculating that ornithischians did not diversify until the Early Jurassic; the fact that Pisanosaurus combines some craniodental traits of Ornithischia more advanced than those of Lesothosaurus and the postcranial traits of basal dinosauriforms complicated matters further, because this mosaic of morphological features threatened the status of Pisanosaurus as the oldest ornithischian. Agnolin and Rozadilla (2018) tidied up matters by concluding that Pisanosaurus is a silesaurid that evolves craniodental features convergent with those of advanced ornithischians. The new paper by Muller and Garcia (2020) has a pretty novel hypothesis to explain the virtually non-existence of Ornithischia in Triassic deposits. It shockingly recovers Silesauridae as paraphyletic with respect to traditional Ornithischia (containing Genasauria and Eocursor), suggesting that the earliest relatives of Ornithischia evolved a purely faunivorous diet, given that Asilisaurus from Tanzania has sub-triangular crowns and a constricted root and dentaries with a beak-like anterior tip. For instance, Lewisuchus is recovered a more primitive than Soumyasaurus and Asilisaurus. Since Pisanosaurus has a mosaic of ornithischian-like features and postcranial traits usually seen in non-dinosaurian dinosauromorphs, it may be surmised that the earliest dinosaurs had some postcranial features similar to those of lagerpetids and Lagosuchus. Of interesting note is the fact that Technosaurus (named for Texas Tech University where the holotype is stored) was once considered a 'fabrosaurid' ornitischian before it was classified as a silesaurid, so the placement of all silesaurs as closely related to Ornithischia and recovery of Pisanosaurus as sister to Ornithischia means that the peculiar morphology of Pisanosaurus renders silesaurs more closely related to ornithischians. Randall B. Irmis, William G. Parker, Sterling J. Nesbitt & Jun Liu (2007) Early ornithischian dinosaurs: the Triassic record. Historical Biology, 19:1, 3-22, DOI: 10.1080/08912960600719988 Parker, W. G., Irmis, R. B., Nesbitt, S. J., Martz, J. W., & Browne, L. S. (2005). The Late Triassic pseudosuchian Revueltosaurus callenderi and its implications for the diversity of early ornithischian dinosaurs. Proceedings. Biological sciences, 272(1566): 963–969. https://doi.org/10.1098/rspb.2004.3047
  19. Reef fossil ID

    Hello, Ive been wracking my brains over this and I can't find anything close on Google but it really looks familiar. This is from what I think is early Triassic Thaynes group near Minnetonka Cave in St. Charles Creek/Canyon (from a paper I couldn't download so I lost it) (west shore of Bear Lake) but there is Ordovician St. Charles Fm immediately to the west. The geologic maps I can find don't even show the Triassic but I collected the ammonite locality south of Liberty so I know it's at least in the area. Anyway I collected this little bugger at the site and I'm stumped (honestly the only fossils I know well are Eocene-Miocene marine in OR & WA). The bivalve (brachiopod?) is from the same site. I got a lesson in how not to do acid removal of limestone matrix so it's a little over-soaked lol.
  20. Nice full stride of Chirotherium

    Found a nice set of front and rear, left and right chirotherium prints. Couple pictures of what the site looks like - I move one and hit two more. Currently have over 100 rocks with footprints.
  21. This one is kind of artsy

    The footprint in the lower right is chirotherium. The straight line looks to be a tail drag. The squiggly lines are mud cracks I assume.
  22. Phytosaur tooth

    I just bought this phytosaur tooth. Species: maybe Machaeroprosopus Age: Upper Triassic LOCATION Private Ranch, Northeast Arizona FORMATION Chinle Formation
  23. Morning footprint finds

    The first picture is a Rotodactylus that has all five toes. The little one at the bottom center is sort of oval shaped and sticks out an angle. Second picture I have no idea. The print on the far right center looks like it has stubby little toes.
  24. We Finally Know How This Ancient Reptile Lived With Such an Absurdly Long Neck By Mike McRae, Field Museum press release link Aquatic Habits and Niche Partitioning in the Extraordinarily Long-Necked TriassicReptile Tanystropheus Spiekman et al., Aquatic Habits and Niche Partitioning  in the Extraordinarily Long-Necked Triassic Reptile, Tanystropheus, Current Biology (2020) PDF Yours, Paul H.
  25. I found these Rhynchosauroides trace fossil trackways well-defined in the Triassic red bed sedimentary deposits in the Newark Basin in southeastern Pennsylvania. Lincoln cent shows scale.
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