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  1. Over the past few months I have seriously been doubting the validity of Troodon. For the majority of the time I’ve known about Troodon I thought it was valid, however I’ve started to doubt its validity. The main reason is that it’s only described from one tooth. I thought I’d bring this question here because there’s a lot more people here that know more about paleontology and taxonomy than me. Thanks for any help!
  2. Fullux


    Kind of interested in this fossil, says it's a troodon tooth, wanted a second opinion. It's from the hell creek formation.
  3. tortienutmeg

    what species is this?

    This is the only good photo i could get of this tooth as its so small. I know the tip is missing,but any ideas? hellcreek wibaux county.
  4. Dino Dad 81

    The Lightning Bolt Tooth

    Happy Sunday! I got this tooth a while back and figured I'd follow up my recent Troodon premax tooth ID post with it. It's 6mm long and is from the Judith River formation in Hill county, Montana. I ran it by @Troodon back when I was considering buying it and he thought it was a patho Troodon premax, but that was before I had good pictures of it. Please let me know if these also support that identification. Thank you!
  5. Dino Dad 81

    Troodon premax?

    Hope everyone is having a nice weekend. I'm thinking this 6mm tooth (perhaps 7mm, if not for wear) from the Hell Creek formation of Garfield co, Montana is a Troodon premax. What do you think?
  6. 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
  7. ThePhysicist

    Paravians of Hell Creek

    From the album: Hell Creek / Lance Formations

    Even in the final years of the non-avian dinosaurs, the paravians remained diverse, with many species represented in the famed Hell Creek formation.
  8. Dino Dad 81

    Saurornithelestes, Troodon?

    Hello and thank you for checking this out. I got this tooth a while back. It comes from the Judith River Formation and is about 8mm apical length. The serrations seem large to the tune of Troodon, but they're too worn to be certain that they point apically throughout the posterior carina. (It was sold as Pectinodon, but I'm not seeing that.) What do you think it is? Thanks!
  9. TyrannosaurusRex

    Joseph Leidy and His Discoveries

    Another day, another art project for school I’m working on. This time it’s supposed to be inspired by google doodles, so I chose to do the 19th century paleontologist Joseph Leidy. He’s lesser known than his student, Cope, but his finds contributed hugely to North American paleontology. My first concept was to simply have him standing with a Troodon to the left, but that was quickly scrapped. I then went with some light thumbnail sketches, and found one I liked before starting to do an inked version of it. This ended up being the more finalized thumbnail sketc
  10. Mioplosus_Lover24

    Troodon Tooth?

    I found this tooth in my Aguja matrix and the serrations are way larger than any of the other teeth I've found! I can take more pictures but this tooth is so tiny and I'm unsure of it's exact measurements.
  11. PaleoNoel

    Pectinodon tooth

    From the album: Lance fm. Microsite Finds

    Another shot of the Pectinodon tooth featured earlier in this album, this specimen was found by my dad and is one of two Troodontid teeth in my collection.
  12. Found lots of teeth today, here’s some I need a little help with as I’ve never found these before. I think one is a troodontid, one is maybe dromaeosaur, and the other I have no idea. (Apologies for the quality, my phone isn’t good macro photography) Dinosaur Park Fm
  13. Hello folks. I'm a fairly new collector, but have done a lot of homework over the few months while I've been getting started with this hobby. The one specimen that I really want in my collection is a Troodon tooth. I just love the way they look. I'm pretty comfortable with where I usually get my teeth, and have a lot of confidence, but I haven't come across a Troodon. I found a seller that had this labeled as Troodon, but had some super blurry photos. I was very skeptical, because the serrations did not look right to me, even from the seller photos. The seller told me that if I get conf
  14. I have yet to see a conclusive list of EVERY dinosaur known from the Hell Creek Formation, I am curious if anyone has one or knows all the dinosaurs, thank you!
  15. FF7_Yuffie

    A selection of Hell Creek teeth

    Hello, now, apologies for the photos. They're the best the seller can get, I'm afraid. But hopefully they are ok to get some sort of ID/confirmation. He has a selection of Hell Creek teeth. They are all very small--ranging from below 1cm to just above 1cm in length. 1 - Troodontid -- not the clearest image, but they seem to have distinctive denticles which are common in troodontid teeth? I don't think Troodon is from Hell Creek, but I see online it says Troodontid teeth have been found there. Seller has a more precise location of Harding County, South Dakota for these.
  16. BonuFrailman

    Troodon or Pectinodon tooth?

    Good afternoon, I found this tooth on a fossil website for a great price and had to get it! Now the part I’m struggling with is wondering whether or not it’s a troodon specimen or pectinodon specimen. The pictures are kind of dark so I can’t really see any mesial serrations. Basic info: The tooth comes from the Hell Creek FM and is 0.12” long. What do you guys think? I’m leaning towards pectinodon.
  17. The Basic Dinosaur Egg Guide Many people often mistake a concretion for an egg, to help clarify what is a concretion, and what is a real egg, here is a guide. A quick overview with examples: How to spot a concretion: How are they different from eggs? A concretion is a rather common rock made of tightly compressed minerals. Typically, concretions are a smooth sphere or oval with little to no surface texture or just a few bumps. Often nearly a perfect sphere, sometimes more of an oval. In a concretion, there
  18. Sorry, but Troodon formosus is a valid taxon! check it; OK, I feel like I have to clear this up. This isn't meant to be trolling only posting some of the answers Jack Horner gave me on twitter answering my question. I am not trying to offend anyone. This is simply teasing and supposed to be fun in games.
  19. DINOMAN91

    Dinosaur Egg Shell

    These egg shells were found at a site in Montana with some troodon teeth are these possibly troodon egg shells? There around 1mm thick with a smooth surface
  20. Dino1

    Troodon tooth?

    Hey guys, I think these may be troodon tooth, but I’m not really sure can you guys help my identify this tooth?(the one on the right)
  21. Rexofspades

    Fossil ID Rex or Nano

    Hello everyone, On this edition of Rex or nano, we have this nice little mailbox score I got earlier this year. The seller and I are reasonably certain that it is a young adult rex. But I wanted to bring it to you folks to get your assessment. It matches the locality of Rex ( hell creek, from a microsite in Carter county) and based on my research from the forum and elsewhere it checks out as tyrannosaurid. (Ie: robustness and seemingly no pinch) Bonus question: I'm also curious on the placement of the tooth in the animals jaw. I have reason to believe it m
  22. From the album: Vertebrates

    Prismatoolithus gebiensis Zhao & Li, 1993 Upper Cretaceous Maojiacun Formation Neixiang Henan PRC Length 10cm / 4" These eggs probably stem from Troodons
  23. An interesting article “proving” most dinosaurs were warm blooded and that Troodon may have been able to switch back and forth to cold bloodedness. https://www.discovermagazine.com/planet-earth/fossil-eggshells-suggest-all-dinosaurs-may-have-been-warm-blooded https://news.yale.edu/2020/02/14/were-dinosaurs-warm-blooded-their-eggshells-say-yes
  24. Seen on an auction site. I highly doubt its a Troodon clutch but I thought I'd throw it out to the forums and see if anyone can ID it. Thanks
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