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Found 31 results

  1. 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.
  2. Partial Daspletosaurus tooth?

    I just got this tooth in the mail today. It’s a partial tyrannosaur tooth, and it’s from the Judith river formation. I know it was found in Montana, but that’s it for locality. Despite it being partial, it’s approximate 1.25 inches long, and it looks to me like it would have been much larger if complete. I know that Daspletosaurus and Gorgosaurus teeth are indistinguishable, and that you can really only call teeth around 3.5 inches Daspletosaurus. I was wondering if it would be safe to assume that this is a partial Daspletosaurus tooth because the small piece I have is already over an inch, and it looks to me like it could easily have extended an additional 2 inches.
  3. Odd Tyrannosaur tooth

    Hi can anyone tell me what happened, or why this Tyrannosaur tooth looks this way. It looks very odd to me Thank you! it’s from the Judith River formation of Montana, and is 1.2 cm.
  4. I urge caution to all collectors buying or trading from dealers, diggers or fellow collectors. Most collectors, diggers or dealers are honest and trustworthy but not all have a firm handle on identification and I'm seeing this situation worsening not improving. Its not easy even for paleontologists who are trained. I include collectors because like myself, have over the years, been sold misidentified material. So dont trust anything you see offered to you and get it verified. Here is just a sampling of a few items I've run across. Provenance is very important in identification ALWAYS request Formation, State or Province and very important County or Town if in the States or City/Area if Alberta. I see lots of genus/species names being assigned to Ceratopsian or Hadrosaurian bones. Other than Edmontosaurus from the Hell Creek or Lance formations its extremely difficult to assign names to any post cranial material from these families. There are just to many named or yet to be named species from Campanian deposits of formations like Aguja of Texas and the Judith River & Two Med Formations of Montana not to mention Canada. Theropod teeth especially Jurassic ones are very hard to distinguish between one another, photos are just not adequate to validate them. Serration counts and dimensions are needed to try to properly assign them. So request it from the seller. Some real life examples: Very nice Metatarsal listed as a Lambeosaurus from the Hell Creek Fm, Jordan, Montana. Species does not even exist in the HC. Its Edmontosaurus This beautiful vertebra is being listed as a caudal of a Carcharodontosaurus sp., a great collector piece. The description states that the ball and socket indicated how far the tail could swing. Unfortunately the seller is looking at the wrong end of the dinosaur. To me it looks like a cervical vertebra of a Spinosaurid. I did advise the seller a few days ago and he did say a change would be made and the listing has been corrected. Here is a photo of a Sigilmassasaurus for you skeptics This type of tooth from the Kem Kem is an indeterminate Abelisaurid not a RAPTOR, not a Dromaeosaur, not a Deltadromeus Very nice femur being listed as Pachycephalosaurus, its Thescelosaurus .. Very nice rooted tooth being listed as Torosaurus, its a Ceratopsian tooth. There is no way to distinguish Torosaurus teeth from all the other large bodied ceratopsian in the Hell Creek Fm other that if it was found with an identifiable skull. This claw was sold as Troodon from the Judith River, to me it looks like Caenagnathidae This is being listed as a first phalange Toe bone of a tyrannosaur Daspletosaurus. Its a metatarsal of an indeterminate Tyrannosaurid either Daspletosaurus or Gorgosaurus. Unless it was found with some Daspleto diagnostic material, difficult to tell them apart. Seller was advised a long time ago, no changes made. A Daspletosaurus tooth is listed from the Judith River Fm...beautiful tooth but one cannot distinguish teeth between teeth of Tyrannosaurids and Daspletosaurus sp. although assumed to be present its yet to be described from JR deposits
  5. Next up in my collection is this one that was sold to me as a possible saurornitholestes langstoni tooth. From the Judith River Formation in Wheatland Co. MT. CH is 9 mm. Serrations are 15 per 3 mm on the posterior of the tooth and 23 per 3 mm on the anterior of the tooth. @Troodon
  6. Unidentified theropod

    This next tooth in my collection was sold to me as " Unidentified Theropod ". It is from the Judith River Formation in Montana....its CH is 7 mm..its posterior serrations are 16 per 4 mm and its anterior serrations are 19 per 4 mm. what do you guys think it could be from???? @Troodon @fossilsonwheels
  7. Dromaeosaurus albertensis?

    Hey everyone this next tooth in my collection was sold to me as a possible Dromaeosaurus Albertensis from the judith river formation in Hill co Mt. Its size is 5/8"....CH is 16 mm, the anterior serrations are 9 per 2 mm and the posterior serrations are 8 per 2 mm.....again sorry for the finger placement in some of the pics...in trying to get the best shots i can for you all. @Troodon
  8. Hadrosaurid teeth ID

    Hey everyone, I recently came across these two teeth online. They're both pretty worn down and might no longer possess the features necessary for a more detailed ID, but I'd appreciate your help in confirming that these are actually Hadrosaurid teeth. [images attached are the seller's] Tooth 1 comes from the Judith River Formation of Montana; measuring roughly 9mm [not specified in which direction; I assume depth].  Tooth 2 comes from parts of the Aguja Formation in Western Texas; measuring approximately 13x11mm [not specified along which sides]. Thank you for your help!
  9. I have 2 campanian tyrannosaur fossils, one from the Judith river formation from Blaine county in Montana, and another where the only locality I know of is that’s from the two medicine formation. I was wondering if the locality can help determine between Gorgosaurus, Daspletosaurus and Albertosaurus, or if any formations are limited as to which species is present.
  10. What type of tooth is this?

    I bought this tooth a few moths ago, and I’ve been wondering if it was from the front of the mouth or not. It’s a tyrannosaur Indet tooth from the Judith river formation, and it’s about 1.25 inches long. It was listed as a front maxillary tooth, but I wasn’t sure if there are any other types of teeth besides the premax teeth the front teeth on the bottom (I think they’re called dentary teeth?)that have serrations on the sides of the tooth instead of the front and back.
  11. Bone ID

    This is a piece of fossilized bone I bought over the summer. It was sold as being from a centrosaurus. I understand that a perfect ID is impossible, but I was wondering if any one had an idea of what type of dinosaur it could be from, if it even is dinosaur. I was also hoping to find out what type of bone it is. It had an interesting shape to it so I was hoping if nothing else, where in the skeleton it could have been from. It says it’s from the Judith River formation, and the only locality given is eastern Montana. Again I don’t think it’s possible to tell exactly what it’s from, I was just hoping for some general description.
  12. Dinosaur Tooth Confirmation

    Hello, It has been a little while since I've posted here; but I'd like some help if possible. I rarely buy fossils but as I'm a ceratopsian fan and we don't have any in our local formations (UK) I've decided to buy a tooth; I'd just like ID confirmation and wether it's a good example. I don't mind a little feeding wear nor matrix, which it has, but from what I've seen via search engines is that the preservation (Judith River Formation) and the fact that the tooth is rooted is quite good? I bought this from FossilEra and I assume they're still reputable. It's noted down as chasmosaurus sp. I reckon you can only ID down to a genus? I don't know much about the Judith River Formation; so it'd be nice if someone could help me out with some context. 1.55 inches long (photos are taken from the website, they're not my own) All the best!
  13. New Dinosaur Education Displays

    We did a lot more work on our shark stuff this summer than dinosaurs but we did change how display the non touch fossils. We added a few new items too but stayed light on additions. First up is our updated Cretaceous North Africa display. We added a really nice theropod tooth that fits @Troodon ‘s Morph Type 4 Dromaeosaurid-like profile hence the label for the program. We explain the ID difficulties of fossils so for a tooth like this they know we are not sure of what critter had this tooth. I am pretty happy with how this one looks. We give a nice picture of Cretaceous North Africa from two different times. This is an important part of our program and we have some nice fossils I think. We also have two touch fossils with this section. A limb bone that we go with Spino as the critter and one is a theropod very that we use to talk about Deltadromeus.
  14. Tyrannosaurid Indet Confirmation

    Hello all, Recently acquired 2 teeth, found and sold together, that I would love some insight and second opinions on. Both teeth are described as Tyrannosaurid Indet, from the Judith River Formation. The seller described that he purchased them both together from the harvester, but due to the fact he was not the original collector, the information is isolated to the above information. Smaller tooth is 15/16" long, dark chocolate color, and 1/4" wide. Serrations are present on front and rear edges, with serrations starting midway on the front edge. Larger tooth is missing the front edge, appears sheared. Length is 1 1/8", width 5/16". Serrations present cleanly on rear edge, but again completely sheared from front edge. Color also deeper chocolate brown, but more horizontal banding. Can obtain more detailed and specific measurements of other needed dimensions if needed. Mainly I'm looking for a confirmation of Tyrannosaurid Indet distinguished from other theropods in the area at the time, as I have little experience positively IDing smaller tyrannosaurid material. I've actively worked on distinguishing Carcharodontosaur teeth from Rugops in the field in Morocco, but this is out of my field. All help is greatly appreciated! Will post more pictures in comments
  15. Some very nice dinosaur material is being offered for sale but their identifications need some massaging. This beautiful tooth is being identified as Gorgosaurus from the Judith River Fm. Its a "Tryannosaurid indet. " since we cannot distinguish teeth between Gorgo and Daspletosaurus.. Looks like an anterior dentary position. This gorgeous rooted hadrosaur tooth is being identified has Lambeosaurus also from the JRF. Most seasoned collectors know its very difficult to distinguish teeth between different hadrosaur species. Quite a few are described from the JRF not sure if Lambeo is one. Best identified : Hadrosaurid indet. A Majungatholus tooth from Madagascar is also offered. Unfortunately the tooth is clearly not an Abelsaurid so it cannot be Majungatholus or properly called Majungasaurus. What is it I really do not know since very little is described from the Maevarano Formation. It also brings to question if the locality is correct. "This tooth was already posted on the forum" From the Judith River Formation the seller is offering this Troodon foot Claw. Only two photos were included in the listing so it was difficult to tell but initally it does not look like one more like an Oviraptorid claw. If you are interested I would ask for more photos so we can have a better look. From the Cloverly this bone is being offered as a humerus from a Tenontosaurus. I do not believe its one and have included the arm of a Tenontosaurus from my collection to see what one looks like. Its the bone on the left. Could be an ulna but not sure.
  16. Strange juvenile gorgosaurus tooth

    On my birthday I got a juvenile gorgosaur tooth didn’t look special other then the colour but then I started to check it out and study it and instead of serrations there were small holes so I came up with a theory how juvenile tyrannosaurs didn’t have serrations until they got older yet I still need more proof to back up my theory but I found it interesting it was collected on a ranch in the Judith River formation not to far from the Canadian border it is 75 million years old here are some photos of it.
  17. Today is my last day off before I go back to work and I was supposed to spend the day making fossil starter kits. I have a cold though and I do not want the kids to think that 12 million year old shark teeth gave them a cold lol I am pretty bored so I thought I would post about our Judith River dinosaur fossils and how we are going to get discuss this formation. I am really surprised how much I am enjoying learning about these dinosaurs and this will be a formation that we spend a good bit of time on. It must have had some very productive ecosystems and there is a great diversity here to discuss. The kids will also get to see some familiar dinosaur families while learning about species that are new to them. I think during adaptation related presentations, this formation lets us get into ecological niches and discuss how two Tyrannosaurids existed as did at least two species of Dromaeosaurids and a Troodonitd plus other predators including non dinos. That is a lot of hungry mouths so niche selection and adaptations become very important. THere is also a great diversity of herbivores in this formation. I love the Ceratopsians from this formation and the diversity gives my son a lot of artistic options. We currently have one tooth but by the time we present we will have a couple more I think. This allows us to present a few species and say the teeth are not diagnostic so the teeth could have belonged to one or more really cool looking horned dinosaurs. This also gives the kids knowledge that there other Ceratopsians besides Triceratops. This will also be the point where we introduce Dromaeosaurids. Raptors are just iconic and this formation gives us the chance to really hit on adaptations. We have a Saurornitholestes tooth and will soon have a Dormaeosaurid caudal vertebra. While not assigned specifically to Dromaeosaurus, the vert will presented that way so we can talk about the differences between the two raptors. Of particular interest is the larger skull, more robust teeth, and specific wear patterns on the teeth of Dromaeosaurus. We will also have a small tooth tip from a Tyrannosaur indet. The kids will love learning about other Tyrannosaurids and I will leave it to the kids to imagine which one it belonged to. The real owner of the tooth is not important. That two existed in this formation is what is important. They must have occupied different niches plus a lot of kids may think T-Rex was the only member of that family. The last fossil I know we will have from Judith River is one of my favorites. It is an Ankylosaurus tooth and thanks to some help from TFF members, I spotted this among a few Nodosaur teeth. In our inventory, this is Ankylosaurus indet. However, in every single dinosaur presentation we do this will be Zuul and it will be a rock star. We want the kids to understand that there are many new discoveries being made and there will be a lot of new dinosaur discoveries made by THEIR generation. Everything about Zuul will be cool to kids. It is the one of the most incredible fossils ever found, armored dinosaurs are just cool, and it even has a pop culture name that a lot of kids will recognize from Ghostbusters lol Only 5 fossils but we can do A LOT of quality education with these fossils. I also have a very clear idea of the next items to find from Judith River. #1 on that list is a Dromaeosaurus tooth. A tooth gives us the perfect way of illustrating the difference between the raptors. We have two more purchases to complete before I buy again so I will save up and in the spring I start searching for that tooth. I also would love to add a hadrosaur bone from this formation and eventually I will track down a frill piece. Anyway, here a couple of the fossils... Pic 1- our Saurornitholestes tooth. Not a great picture but a really nice tooth. Pic 2- the Dormaeosaurid indet vert. Not here yet but will be right around my B-day. Pic 3- the Anky tooth. It is just a cool tooth and Zuul is a great dinosaur to teach kids about so Zuul is what this tooth is for Fossils on Wheels. Our only fossil from an armored dinosaur.
  18. I was hoping somebody on TFF might be able to point me in the direction of any scientific papers, research or information that members here might have put together regarding dromaeosaurid theropods from the Judith River formation. This is not really about identifying any teeth, though I do have one from that formation. I am starting to do my research for the education program and am looking for scientific information. From what I can gather, there is a possible Saurornitholestes species and of course the dinosaur I have seen referred to as Julieraptor, which is a interesting story all on its own. I have also seen Dromaeosaurus listed from that formation. I would like to sort out what is known and unknown from the formation and the best way to present our "raptor" tooth to the kids. Any help links or suggestions as to where I might find more information on this would be much appreciated
  19. Daspletosaurus tooth?

    Hello everybody So this tooth here is up for sale. Described as a Daspletosaurus tooth from the Judith River Formation. (Not more information) Length: 5,3 cm or around 2 inches. There seems to be some crack repair on the tip but other then that it looks good to me. What I wondering is, if it's possible to describe this as a Daspletosaurus tooth? Or are there just to few information for a proper identification? Any help on what I am looking at is very welcome. Thank you!
  20. Mystery Judith River Dinosaur Bone

    Here’s one that has me scratching my head. It’s a bone I found in the Judith River Formation of Montana recently, I picked up these two pieces and later realized they go together. They’re definitely placed properly, but the shape is strange and I can’t ID it. My initial thoughts were some type of hadrosaur toe bone, but I can’t find any close matches online. What are y’all’s thoughts on this one?
  21. Theropod Teeth ID's Check

    I believe I know the answers but like to confirm the ID's and raise a red flag if appropriate. Seller is offering the following from the Judith River Formation of Montana Saurnitholestes Tooth 1/4" Aublysodon Tooth 3/4" Daspletosaurus tooth 1.4" Daspletosaurus tooth 7/8"
  22. Some Judith River IDs

    Here are some small fossils I found back in the summer of 2017 in Montana up in the Judith River Formation. 1. Small reptile vertebra? (.5 cm) 2. Assorted tiny bones several of which are likely from birds. 2a. Hollow at the broken end (about .8 cm). 2b. Hollow at both ends (1.2 cm). 2c. Hollow at both ends as well, looks like limb bone. (1.5 cm). 2d. Appears to be hollow on both ends (.7 cm).
  23. Seller has listed these teeth as Daspletosaurus from the Judith River Fm, Hill County Montana Can you determine if this is a correct ID for these teeth. Thanks .
  24. Consolidated all my informational Topics to make it easier to reference. Will keep updating since some of the reference material is outdated. Have to thank @PFOOLEY for suggesting this consolidation and it makes it a lot easier for me to access these topics as well as our members to know what's out there. General Tips in Buying Theropod Teeth Dinosaur Anatomy 101 Stratigraphy of the Late Cretaceous in North America Best Books for Dinosaur Identification Triassic Identification of Dinosaur Teeth from the Triassic of New Mexico Jurassic: Morisson Formation Identification of Theropod Teeth Quick Guide To Sauropod Teeth Tips in Buying a Sauropod Foot Claw Ornithischians from the Morisson Formation Jurassic: Europe Dinosaurs of Costal Portugal Jurassic Theropods of Germany Cretaceous: North America Identification of Theropod Teeth in the Hell Creek and Lance Formations Identification of Troodontid Teeth Identification of Tyrannosaurid Teeth From North America Identification of Ankylosaurid Teeth Identification of Acheroraptor Teeth North American Tyrannosaurids what is Described Identification of Claws and Ungals from the Hell Creek and Lance Formations Identification of Pachycephalosaurid and Thescelosaurus Teeth Tooth Features in Tyrannosaurids The Case for Nannotyrannus Dakotaraptor Teeth and Claws Hell Creek Fm Identification of Bones /Claws from Alvarezsaurids from North America Hell Creek Faunal Representation Identification of Theropod Teeth from Judith River and Two Medicine Formations . Theropod Assemblage of New Jersey Cretaceous: Kem Kem of Morocco Kem Kem Theropod Teeth Kem Kem Theropod Tooth Morphology Identification of Sauropod Teeth from the Kem Kem Tips in Purchasing a Spinosaurid Hand Claw Identification of Claws from the Kem Kem Identification of Spinosaurid Jaws from the Kem Kem Pterosaur Teeth from Kem Kem Republic of Niger Identification of Theropod Teeth Thailand Identification of Spinosaurid Teeth Cretaceous: South America Patagonia's Theropod Teeth Cretaceous: Uzbekistan: Identification of Theropod Teeth: Uzbekistan Sauropod Teeth: Uzbekistan Cretaceous: Europe Identifying Baryonyx Teeth
  25. Raptor tooth to id

    Hello! I have purchased this nice raptor tooth from Judith River formation. I think this is saurornitholestes tooth. Am I correct? Thanks in advance!
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