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  1. This came from a very barren site in far southwestern Jack County, Texas. I screened about a liter of bulk shale and only found 11 fossils total left in an 80 mesh screen! Macro fossils were about the same, a couple of crinoid stems and a few brachiopods from over 3 hours looking. The micros also included one uncertain coiled mollusk, 2 tiny brachiopods, one pinate bryozoan, 3 holothuroid spiciles, a small high-spired gastropod and a crinoid stem section. Scale is mm.
  2. ThePhysicist

    Dinosaur eggshell

    From the album: Hell Creek Formation Microsite

    A dinosaurian eggshell. Sand grains have lodged in most of the pores. The inner surface isn’t as interesting or distinctive, so I didn’t include it in the graphic.
  3. Hi all. I have slowly been working on sorting through a few gallons of micro matrix from a partiularly rich lag deposit within the Donoho Creek formation in South Carolina. I have been able to identify many of them, and I will share some nice ones that I have identified, however I also will be seeking help from time to time in identifying ones that I am not having as much luck identifying in hopes the community can help! Let's get started shall we? This is one of my personal favorites - a Borodinopristis Schwimmeri (sawfish) oral tooth. They are extremely rare down here, and I just recently found my first one. ~2mm. This is another one of my personal favorites - a Lonchidion Babulskii oral tooth. This is a particularly impressive specimen due to the preservation of the porous and fragile root, along with no wear on the crown. ~5mm. Here's a particularly enigmatic object for me thus far - I have been told this is a carpet shark, however i am unsure even to what genus - would anyone have any suggestions? No carpet sharks are mentioned in published literature (as far as I am aware) from this deposit. It is ~2mm in size. The most fun section - denticles. I have found tons of fascinating and differing denticles and am interested to see if anyone can help me assign these to anything specific. They're all very small, ~2mm 1. 2. 3. 4. 5. Hope you all enjoyed seeing some of the microfossils I am finding, and hopefully some of you are able to help in identifying some of them! I'll update this thread as I find more enigmatic micros.
  4. Sonickmonx

    Juveline Squalicorax kaupi? Tooth

    From the album: Donoho Creek Microfossils (South Carolina)

    This is by far the smallest squalicorax tooth I have found so far. It is ~2mm x 2mm, hence the designation as a juvenile.
  5. Sonickmonx

    Unknown Denticle

    From the album: Donoho Creek Microfossils (South Carolina)

    This is a particularly striking and unique denticle of some kind. It is twisted on both the root and the crown, and I do not currently know what it is from.
  6. Sonickmonx

    Carpet Shark tooth?

    From the album: Donoho Creek Microfossils (South Carolina)

    This is from an, as of currently, unknown to me type of carpet shark. This is the only specimen I have found of this type and I am very unfamiliar with carpet sharks as a whole.
  7. Sonickmonx

    Eostriatolamia holmdelensis Tooth

    From the album: Donoho Creek Microfossils (South Carolina)

    This is a tooth from the shark Eostriatolamia holmedlensis. This is a small tooth compared to most, but it is in excellent condition.
  8. Sonickmonx

    Lonchidion Babulskii Tooth

    From the album: Donoho Creek Microfossils (South Carolina)

    This is a tooth from the hybodont Lonchidion Babulskii. This is a particularly remarkable specimen as the porous and fragile root is still intact.
  9. Sonickmonx

    Ptychotrygon Rostral Spine

    From the album: Donoho Creek Microfossils (South Carolina)

    This rostral spine is from the sawfish Ptychotrygon. This sawfish didn't have any large rostral spines, only micro ones.
  10. Sonickmonx

    Borodinopritis Schwimmeri Oral Tooth

    From the album: Donoho Creek Microfossils (South Carolina)

    This is an oral tooth from Borodinopristis Schwimmeri, a very rare sawfish from this deposit.
  11. ThePhysicist

    Varanoid lizard

    From the album: Hell Creek Formation Microsite

    These large lizards are kin to modern monitors like the Komodo dragon. The possess sharp, finely serrated teeth and long claws good for climbing and digging. They likely preyed on smaller animals like other lizards and mammals, and may have been the bane of parent dinosaurs as some paleontologists have suggested they could raid dinosaur nests. Varanoid “monitor lizard” fossils. A) trunk vertebra, missing a good portion of the process; B) tooth showing basal cross section silhouette and closeup of serrations.
  12. ThePhysicist

    Holostean scales

    From the album: Hell Creek Formation Microsite

    I found a few holostean-grade scales that haven’t been attributed to more precise taxa, and are referred to as holostean “A” and “B” in the literature. These are not gar and are something else.
  13. ThePhysicist

    Lonchidion selachos

    From the album: Hell Creek Formation Microsite

    Lonchidion was one of the last of the hybodonts, a lineage of shark-like fishes spanning nearly 300 million years before they went extinct along with the non-avian dinosaurs. Lonchidion had barbed spines on their dorsal fins and a durophagous dentition more suited to grinding than grasping. Like most hybodont teeth, their roots are fragile and their teeth are only rarely found complete. In this deposit they seem to be fairly rare; I’ve thus far only found two.
  14. ThePhysicist

    Perinatal hadrosaurid tooth

    From the album: Aguja Formation

    A very small tooth from a "baby" hadrosaurid. It has feeding wear, so clearly not embryonic.
  15. Is this a Horn Shark heterodontus anterior tooth? The tooth has the main cusp and two lateral cusplets with circular base. Small in size – 2mm across. Found in the Upper Eocene – Ocala Limestone Formation – location in Sumter County, Florida. Thank you.
  16. ThePhysicist

    Mammal discovery

    From the album: Hell Creek Formation Microsite

    Mammals are always a joy to find - a rooted marsupial lower premolar.
  17. JacksonR

    Microfossils

    I dissolved limestone from Michigan in acetic acid and got some interesting things, among them these. The source for the limestone is unsure of their exact age. Ordovician-Devonian. Any ideas?
  18. ThePhysicist

    Leptoceratops juvenile

    From the album: Hell Creek Formation Microsite

    A rooted tooth from a juvenile Leptoceratops, a smaller cousin of Triceratops.
  19. ThePhysicist

    Frog jaw

    From the album: Hell Creek Formation Microsite

    A fragment of a frog jaw, with telltale bumps on the labial surface.
  20. JacksonR

    Carboniferous Microfossils

    I've been looking and pulverized rock under a microscope and have found some interesting items. The first image is possibly a fish jaw, followed by a possible shark spine fragment. Any ideas on those 100% or the rest? Thanks.
  21. 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.
  22. ThePhysicist

    Acheroraptor tooth

    From the album: Hell Creek Formation Microsite

    Acheroraptor was a small theropod (dromaeosaurid) "raptor" that lived in the same paleo-ecosystem as T. rex. Its blade-like serrated teeth possess diagnostic apicobasal ridges.
  23. ThePhysicist

    Gar scales

    From the album: Hell Creek Formation Microsite

    Gars are predatory fish, armored with diamond-shaped scales coated in a hard enamel-like substance.
  24. ThePhysicist

    Myledaphus teeth

    From the album: Hell Creek Formation Microsite

    Myledaphus (a guitarfish/ray) teeth are quite common, as expected for a riverine deposit.
  25. ThePhysicist

    Ossified tendons

    From the album: Hell Creek Formation Microsite

    Sections of ossified tendons from ornithischian dinosaurs. Especially in an energetic channel environment, these fragile structures are broken into pieces. You’ll notice the surfaces and ends of several of these are rounded from river transport prior to final deposition.
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