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  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

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  1. Hi! I’m still trying to identify one fossil from a particular unit of Pleistocene/Early Holocene lacustrine silt from my hometown of Saskatoon, but I figured I would look away from it for a bit to try and identify another fossil from the same unit I’ve been unable to classify. I have two specimens, both apparently of the same species. They are both approximately 0.5 millimetres across. They are perfectly circular, with lines radiating from the centre and rings of alternating colours (possibly representing growth lines). One specimen is photographed dorsally, showing its circular shape, the ot
  2. ThePhysicist

    Pectinodon tooth

    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 ti
  3. Samurai

    Unidentified 2mm Cladodont Tooth

    From the album: Chondrichthyan Teeth From The Pennsylvanian Period

    Found in the Muncie Creek Phosphatic nodules sadly I do not have the other half, if it is found I will upload it to the comments or post it separately
  4. Location is in Missouri The area is dated to the Pennsylvanian Formation: Muncie Creek Shale Found this very small tooth like structure and was wondering if anyone could confirm if it is a tooth or not. Normally I can identify teeth if they are large enough, but this specimen is very small. I have found teeth before in these concretions but much larger such as a possible Symmorium or Glikmanius along with a tooth from a member of Eugeneodontida. Here are some images I edited that might make some details more clea
  5. ThePhysicist

    Restesia

    From the album: Aguja Formation

    Small, freshwater shark teeth.
  6. While fossil hunting last year, I collected some shale from between two lenses of Silurian dolomite in Ohio. I have since cooked it down and searched for microfossils, and all I've found (aside from contaminating insect parts) are what appear to me like marbled fragments of bone and what might be . . . denticles? I'm really not sure and would appreciate any suggestions; please see the attached photos. All fossils are about at most 2 or 3 mm in width. Thanks!
  7. ThePhysicist

    Bitten Dimetrodon spine

    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).
  8. ThePhysicist

    Helodus

    From the album: Permian

    A freshwater cartilaginous fish with crushing teeth.
  9. ThePhysicist

    Xenacanthid denticles

    From the album: Permian

    The "sharks" that swam the rivers and lakes of the Early Permian wouldn't be fun to pet!
  10. ThePhysicist

    Mystery tooth

    From the album: Permian

    I'm convinced it's a tooth, but not sure what kind. More images here.
  11. 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).
  12. ThePhysicist

    Permian reptile teeth?

    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 (o
  13. ThePhysicist

    Chiloscyllium greeni

    From the album: Post Oak Creek

    Small "bamboo" shark teeth, about 1 mm tall.
  14. ThePhysicist

    Ptychotrygon slaughteri

    From the album: Post Oak Creek

    Tiny sawskate oral teeth - less than 1 mm in size.
  15. ThePhysicist

    Post oak ultra-rarities

    From the album: Post Oak Creek

    Left: Lissodus sp.; right: Onchopristis sp. These are so rare, don't even bother looking for them. Lissodus is a Hybodontiform shark more commonly found in freshwater ecosystems (guess it also tolerated salt water). Onchopristis is a sawskate, but a rarer genus at this locality than Ptychotrygon.
  16. ThePhysicist

    Post Oak foraminifera

    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).
  17. ThePhysicist

    Chiloscyllium greeni

    From the album: Post Oak Creek

    A small "bamboo" shark, just 1 mm tall.
  18. ThePhysicist

    Post Oak denticles

    From the album: Post Oak Creek

    Various denticles from sharks and rays sitting on the face of a dime.
  19. ThePhysicist

    Rhinobatos

    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.
  20. SilurianSalamander

    Found my first ever microfossils!

    Tiny crinoid columnals. Coming back to the same beach with a sieve tonight.
  21. I was wondering if anyone ever made the claim to have the smallest articulated fossil, because I think I've got a decent shot! These are the smallest fish I've found so far. There are two Mioplosus labracoides and one Priscacara sp.
  22. ThePhysicist

    Polygnathus conodont elements

    From the album: Devonian

    From the Genundewa Limestone. These conodont elements seem to compare well with Polygnathus linguiformis. https://doi.org/10.1007/s12542-018-0408-6
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