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  1. CBchiefski

    Advanced Dinosaur Egg Guide

    The Advanced Dinosaur Egg Guide Please share this with those who have egg questions. When possible, technical terms were avoided or defined. Every effort has been made to ensure accuracy, but it is always important to do your own research. This guide is merely a snapshot of information taken from many scientific publications. I am not an expert on eggs, rather I just love sharing what little I have learned over the years, what science has learned over the years. For an overview on how to spot a fossilized dinosaur egg and the sizes of eggs, see the basic guide:
  2. 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!
  3. 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.
  4. 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
  5. 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.
  6. 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.
  7. 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.
  8. 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
  9. 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)
  10. 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
  11. 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
  12. 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
  13. 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
  14. Greyideas

    A case for Troodon

    In 2017 a study came out claiming that Troodon is a dubious genus (not invalid like some people claim!), he goes on to state that any new fossil discoveries assigned to Troodon would need to be from the Judith river formation. He later implys that the only fossil of Judith river formation troodon is the holotype specimen (which is a tooth). The last part is actually false! I want to create a discussion around this as they have been many teeth, eggs and even vertebrae from the Judith river formation that seem to suggest that the 2017 is flawed.
  15. Hello! Over the weekend I made some new labels for my fossil collection and I was wondering what everyone thought of them. I have QR codes which link to the corresponding "prehistoric-wildlife.com" species page for more info, and I added in some basic I.D. info to the cards to not crowd them. I also attached numbers to the labels and the fossils, so that I don't need to keep the labels directly next to the fossils. Would love to know what you think, and if anyone wants more information/the template I created. Thanks! P.S. Two of my I.D.s I'm still not 100% on (deltadromeus and Pec
  16. PaleoNoel

    Troodon (Stenonychosaurus?) Tooth

    From the album: Judith River fm. Fossil Finds

    This Troodon tooth is one of my favorite fossils in my whole collection. I found this at a microsite in Northern MT in the summer of 2017.
  17. This is being sold as a troodon foot claw from the Judith river, Montana. It measures 36mm. How does it look and does it look like the sickle claw found on the inner toe of each foot? Thanks in advance.
  18. fossils-uk

    Madagascan tooth - croc or dinosaur

    Hi guys just recently picked this up from the st Marie show. Not alot of information except it came from Madagascar. I bought this in conjunction with a rappetosaurus tooth also from Madagascar that has the same patina and look. the question is what is it? Crocodile? or is it something a bit more interesting and dinosaurian? always interested in your advice and help. best wishes byron
  19. I thought I would share this amazing articulated Troodon skeleton recently found by a respected fossil team. It's currently on the market so hopefully it ends up in a nice museum so everyone can enjoy it.
  20. I thought I’d post some of my favorite claws from my collection. I’m curious what people think about my ID on one of them and I have no idea what the last one is. ID help with that one would be great! (All measurements are straight line) Spinosaurus hand claw 4 1/2” Kem Kem Beds, Morocco Repairs, but I see no restoration Acheroraptor Temerytorum foot walking claw 1 7/8” Hell Creek Carter County, Montana No repair or restoration (at first). However, the tip broke off during molding and it was lost. 1/16” restoration do
  21. I was interviewed about my egg research by Garret and Sabrina who have a Dinosaur focused podcast, strangely enough, called "I Know Dino" and wanted to share. Highly recommend their podcast as they provide a nice weekly recap on Dinosaurs, such as scientific news and less serious funny moments. One major point where I Know Dino stands out compared to most media is a focus on accurately reporting current research. Garret and Sabrina strive to engage with the scientific community, for example, they actually attend SVP. They have interviewed many great paleontologists including Jack Horner, Tom H
  22. Interesting reading from Phil Currie museum Blog https://dinomuseum.ca/2019/02/11/whats-going-on-with-troodon/
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