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Found 41 results

  1. Allosaurus tooth/locality ID

    Hi everyone, I have 2 questions about a dinosaur tooth I'm hoping to get answered. 1. I was wondering if I could get some help on the ID of this partial tooth. I got it over 10 years ago and was described as Allosaurus. I wanted to check based on the tooth if that seems realistic. The partial measures approx 1 inch/2.5 cm. I understand that without the locality, it can be difficult to be sure what genus/species it belonged to. But that brings me to my second question: 2. Is anyone familiar with Localities in the Morrison Formation that have given bones/teeth the reddish hue that this tooth has? Since Morrison Formation bones and teeth are usually black, I would assume it would be easy to determine the locality if that were true. I think it was described as just being from Wyoming. Thanks!
  2. What Fossils Alone Can’t Explain About Dinosaurs When time is measured in 10-million-year blocks, the lines between ecosystems and animals that would never have coexisted can get blurry. Laura Poppick, The Atlantic, August 17, 2019 https://www.theatlantic.com/science/archive/2019/08/paleontology-precision-problem/596176/ Yours, Paul H.
  3. Mission Jurassic - "Badlands" of North Wyoming Children's Museum of Indianapolis - BBC News https://www.bbc.co.uk/news/extra/nxVbFidDbs/mission-jurassic Yours, Paul H.
  4. These finds were reported a while back and this paper describes the finds. These two partial skeletons from Montana represent the northernmost occurrences of Stegosauria within North America ever recovered from the Morrison Formation http://app.pan.pl/article/item/app005852018.html
  5. A Few Small But Cool New Dino Fossils

    We have been working primarily on our shark program material but we did add a few new dinosaur fossils. For the most part they are pretty small in size but add quite a bit to the education we do. These represent some iconic and scientifically important dinosaurs. In addition to these small fossils, we added a 6" Trike frill piece from HC, a smaller piece of a Horseshoe Canyon Ceratopsian frill, and a 2.5" Hadro vert from that formation. These are excellent touch fossils so I am happy ! The small fossils are..... Dromaeosaurus sp. Judith River. I big thank you thank you to @Troodon for some ID help. This is a really nice tooth and I am really excited about this one. We can get into some fun science about the study of tooth wear in determining what dinosaurs ate.
  6. Many of us collect material from the Morrison Formation especially teeth and claws. Not much is published to help us identify these items but this new paper gives us some insight into a new Troodontid that includes teeth and claws, Hesperornithoides miessleri https://peerj.com/articles/7247/ The serrations on the mesial carinae of maxillary teeth are smaller than the distal serrations as in basal dromaeosaurids. Mesial serrations are restricted to the apical third of the crown and appear absent in some teeth. Serrations are small (5.5 per mm distally)
  7. Does anyone have a copy of the following paper: Michael D. D'Emic Â& Matthew T. Carrano (2019) Redescription of Brachiosaurid Sauropod Dinosaur Material From the Upper Jurassic Morrison Formation, Colorado, USA. The Anatomical Record (advance online publication) doi: https://doi.org/10.1002/ar.24198 https://onlinelibrary.wiley.com/doi/10.1002/ar.24198
  8. Fossil or not?

    Found this rock on our place in southwest Colorado. It’s very different from most rocks here. With a little research I found we are located in the middle of the Morrison Formation! I’m interested to see if anyone could help identify it. Fossil or cool rock? Thanks for your input.
  9. Allosaurus tooth

    From the album Theropods

    From the Carnosauria group which ran from the Jurassic to Cretaceous came a fearsome theropod known as Allosaurus. These Jurassic age teeth were hand collected by our curator at the Museum of Ancient Life in Lehi, Utah during his visits to the Jurassic aged Bone Cabin Quarry within the Morrison Formation (Wyoming) around the fossilized skeleton of a Barosaurus Sauropod. It is believed that one or more Allosaurus was scavenging from the carcass. Crocodile teeth have also been recovered from the site. To this day these prized teeth worth hundreds if not thousands of dollars remain in the curators private collection.
  10. Allosaurus tooth

    From the album Theropods

    From the Carnosauria group which ran from the Jurassic to Cretaceous came a fearsome theropod known as Allosaurus. These Jurassic age teeth were hand collected by our curator at the Museum of Ancient Life in Lehi, Utah during his visits to the Jurassic aged Bone Cabin Quarry within the Morrison Formation (Wyoming) around the fossilized skeleton of a Barosaurus Sauropod. It is believed that one or more Allosaurus was scavenging from the carcass. Crocodile teeth have also been recovered from the site. To this day these prized teeth worth hundreds if not thousands of dollars remain in the curators private collection.
  11. Allosaurus tooth

    From the album Theropods

    From the Carnosauria group which ran from the Jurassic to Cretaceous came a fearsome theropod known as Allosaurus. These Jurassic age teeth were hand collected by our curator at the Museum of Ancient Life in Lehi, Utah during his visits to the Jurassic aged Bone Cabin Quarry within the Morrison Formation (Wyoming) around the fossilized skeleton of a Barosaurus Sauropod. It is believed that one or more Allosaurus was scavenging from the carcass. Crocodile teeth have also been recovered from the site. To this day these prized teeth worth hundreds if not thousands of dollars remain in the curators private collection.
  12. It is with a good bit of giddy enthusiasm that we share our very first Jurassic dinosaur fossils. We have a start to our Morrison Formation collection and I am so excited to take these into class. This is also a proud moment because my son and I earned these fossils with our hard work. This is a gift to our program from us and a gift to the kids we want to educate. They are also big hunks of dino bone. We needed a couple of larger bones for these programs for visual flair and these fit the bill for our budget. It will be a week before they arrive but I am too excited to wait lol One of the things we learned from our first dinosaur program was that 2nd graders learn about Diplodocus when they study dinosaurs. It was a species they knew. So we purchased a partial Diplo coracoid bone. It is a 15" x 11" x 9" hunk of dinosaur bone that weighs 12 lbs. Our largest and heaviest fossil. This one will really get the attention of the kids I think and gives us a the opportunity to feature Diplo in the program We also added two partial Camarasaurus ribs that fused together during fossilization. It is 14" x 9" so it is good sized and is a great example of the geological process they are learning about. This gives us an additional Sauropod to cover in the program and lest us talk more about niches. This will be a great fossil for the kids to touch as well. We are also adding a few pounds of chunkasaurus bones. Perfect dino fossils for hands on exploration and a few special give away dino bones too. The pictures are not great, not sure why but I will upload more when they arrive. Here are the big ones.... Picture 1- Diplo coracoid Picture 2 Cam ribs
  13. Today is my last day off of work which means I have time to do fossil stuff. It is also the last day for a little while that I will be discussing dinosaur fossil very much. We have shark programs starting at the end of this month so my mind has to get back on the sharks. Dinosaurs go on the back burner again for awhile. I will post a bit more of the collection but I also wanted to share a little bit about my experience with Jurassic dinosaur fossils during the early stage of building our collection. Hopefully it provides something useful to another collector. As we started window shopping in preparation for beginning a dinosaur collection, one thing stood out about fossils from the Jurassic era. They are expensive. The prices are so far out of my range that I did not bother to research them beyond the ones we first encountered from various dealers. I would have to sell a kidney to get a hold of anything from that era. I saw sauropod teeth for up to 2500$ and none under 600. Don't get me started on theropods from that era. It all looked just too expensive. Our collection is built on inexpensive fossils from formations (Bull Canyon, Kem Kem, Judith River, Hell Creek) that produce some great bargain stuff. i saw nothing in the way of bargain fossils from the Jurassic beyond bits of bone or bits of bone assigned a species even though I doubt you could assign a species to those bits. They are chunkasaurus not Camarasaurus is my theory lol Anyway, I had little belief that we would add anything Jurassic except for the chunkasaurus bones for kids to handle. It did bother me though that we would have a glaring hole in the program. Kids associate the Jurassic era with dinosaurs and vice versa thanks to the movies Jurassic Park. Even if the dinosaurs from those movies were not Jurassic, the word association is unavoidable. I decided to back track the origins of the super expensive fossils from that era. I have a theory that there has to be a primary source for all of those high priced dealer bones. I think one or two entities probably supply the vast majority of fossils from the Morrison Formation which seems the primary formation for North America fossils out there. I think I was successful in the attempt to find one of the sources of the fossils. I have seen affordable Jurassic fossils for the first time and I would tend to trust the ID's because these folks dug them up. I suspect season collectors will the know the folks I am talking about. I saw a few fossils that were in the price range that we set for ourselves. It is not a lot of money at all but I saw fossils that we CAN get. We can not buy right now. The Judith River Anky and I are in a firmly committed relationship so until that tooth comes home, I am frozen on purchasing for a bit lol I do have a source though and time to start learning about Jurassic dinosaur fossils before I buy any. I know the general profile of what type of dinosaur fossil we will add. It will be a bone, not a tooth, of a sauropod. It will give us a Jurassic dinosaur to fill that blank space in the program plus it would give us some visual flair. Point is...... a little bit of above ground virtual digging can unearth the fossils you want even if they at first seem to expensive to afford. Be patient, be diligent, do your homework, and you can build a pretty awesome dinosaur collection, with out going broke
  14. Barosaurus prep

    These past few months I've been working on the weekends as part of a team of amateur and professional paleontologists to prepare a large Barosaurus at the Museum of Ancient Life in Lehi, UT. From October to January I have worked on two large vertebrae from this adult Barosaurus. I believe we won't know the gender until we begin work on the pelvis but not to many of these species have been uncovered so we'll have to compare some other models. It's been a very rewarding journey so far. Here's a couple of pictures of preparation work with a Paleo Tool Air Scribe (forgot the model but one of the larger ones) in October. I'll try to get some before and after photos as we're making tremendous progress on these vertebrae. Behind me is a large 9-ton jacket containing a group of Utahraptors and an herbivore (sand pit). I'm not allowed to post any photos of that but the sickle claws and raptor teeth are a very impressive sight. FYI I realize this isn't as finite or fragile a work as the prep jobs @Malcolmt or @Ptychodus04 do but hey it's a start. Working on the vertebrae's. A near complete vertebrae is on the bottom right. I now wear a mask since the matrix particles are so fine and can get into your lungs and eyes. On the wall above me is a skeletal layout of an adult Barosaurus. The red filled in portions indicate the bones we've already recovered. The pelvis, back femurs, feet, and an assortment of vertebrae. The head is yet to be found and might not be in this jacket. Up close of the vertebrae. Another angle Another angle with some near complete tail sets behind me. If you look closely you'll see some completed vertebrae in the background. Another angle Working from behind the glass so viewers can come see. This is a rewarding, volunteer based opportunity where I feel like I can give back to the community. Occasionally I'll poke my head out to educate those passing by. The youngsters really like this exhibit. Smiling for the camera. Fossil description is on the bottom left. The nine ton sleeve containing the Utahraptors is directly behind me. Another angle This might be my favorite. It shows most of the vertebrae lined up. This photo was taken back in October and I'm amazed at how far it's already come along. Really excited to post some closer photos and will compile a time lapse. A bit fuzzy but another angle Another angle Another angle Another angle (yes I'm wearing my Penn Dixie fleece FYI @DevonianDigger)
  15. Diplodocid (?Apatosaurus) sp.

    From the album My Collection

    Diplodocid (?Apatosaurus) sp. Morrison Formation Upper Jurassic Moffat County, Colorado Size: 6.5 cm
  16. Allosaurus sp.

    From the album My Collection

    Allosaurus sp. Morrison Formation Upper Jurassic Moffat County, Colorado Size: 6cm
  17. A new paper is now online that will shock you: Carpenter, Kenneth. 2018. Maraapunisaurus fragillimus, n.g. (formerly Amphicoelias fragillimus), a basal rebbachisaurid from the Morrison Formation (Upper Jurassic) of Colorado. Geology of the Intermountain West 5:227–244. Despite the missing nature of AMNH 5777, Kenneth Carpenter has erected Maraapunisaurus for Amphicoelias fragillimus and reclassified the taxon as a rebbachisaurid based on comparisons of Cope's figures with illustrations of other rebbachisaurid vertebrae. He's also revised the size estimate for fragillimus to 99 feet because Woodruff and Foster (2014) consider a 190 foot long Maraapunisaurus biologically impossible; even with this revised length, Maraapunisaurus was still a huge sauropod compared to other rebbachisaurids. This new size estimate makes sense because Diplodocus hallorum was initially thought to be 140-150 feet long before later research revised the length of D. hallorum to 110 feet, but also because also because of a lack of research into the biological limits of gigantism in sauropods. Given the discovery of the rather early dicraeosaurid Lingwulong, the rebbachisaurid placement of Maraapunisaurus shortens the ghost lineage of rebbachisaurids created by what is known about early diplodocoid evolution in the Jurassic.
  18. I found this listed as a Stegosaurus stenops ischium (looks like a left illium to me) found in Moffat County, Colorado. It looks mostly real to me, but definitely has some restoration in two places (marked in red) (edit: the smaller area looks like it might be only one side). Is the rest of it all real, or am I missing anything? Something about the area between the restored areas looks slightly off to me, though I lean a bit toward real on that. (edit: removed question on value) I would of course prefer something with no restoration, but Stegosaurus fossils are awfully hard to come by.
  19. I saw this Marshosaurus tooth for sale so decided to check it out since some of you might be interested in it. I have some concerns why I decided to post it. If interested you need to do some work. Its not easy to TRY to ID a tooth and most are just identified to a morphology so no guarantee any of this will get answers. 1) The mesial carina is hard to see but seems to extend close to the base. In Megalosaurids it should only extend + 1/2 of the crown height. If interested you should request sharper photos to get a better look. 2) The denticles seem to be apically directed. In Megalosaurids they should be positioned perpendicular to the carina. Again if interested request additional close-up photos. 3) To do your homework properly request a serration count 5mm wide in the center of the distal serrations. With the mesial serrations missing its a data point you are missing. You should be around 16 or above for the distal side 4) The very tip looks it might a resto. They mention that the tooth has had minor crack filling yet there is visible crack in the top photo. Find out were the fill was done and if anything was done to the tip or was that the fill. A closeup of the tip should be requested. 5) The CRB, Crown Base ratio, should be around .5 to confirm that fits within what is seen on marshosaurus. So you need to request the length and width at the base, see photo to insure its done properly Must use the dimensions of a complete tooth.
  20. Bigfoot Finally Described

    The REAL Bigfoot. A nearly meter-wide Sauropod dinosaur foot, unearthed 20 years ago from mudstone in northeastern Wyoming, is the largest yet found is described in the attached paper. The other dinosaur skeletons found at the site have yet to be identified, but the size and shape of the foot bones indicate that it once belonged to a brachiosaur. https://peerj.com/articles/5250/ Maltese A, Tschopp E, Holwerda F, Burnham D. (2018) The real Bigfoot: a pes from Wyoming, USA is the largest sauropod pes ever reported and the northern-most occurrence of brachiosaurids in the Upper Jurassic Morrison Formation. PeerJ 6:e5250
  21. I have recently purchase two large pieces of Jurassic aged bone from the Morrison Formation near the Dinosaur National Monument in Northwest Colorado. They seemed to be shaped in a way that it maybe possible to give them a general ID, I don't know if it can of course go as far as ID the specific dinosaur of course but if anyone with experience may know what kind of bones they are, any help would be appreciated as I would like to label them for the collection. As it stands the first larger one I believe to be likely sauropod bone or some other large herbivore while the second one I think may be theropod of some sort. Also if it's possible would anyone be able to tell what kind of bone they maybe like for example limb, leg, metatarsal, etc. Any feedback will be greatly appreciated! The larger bone measures nearly 9 1/2 inches long The smaller one measures approximately 6 1/2 inches long
  22. Hi I am currently preparing some Camarasaurus bones from the Morrison Formation. Unfortunately, roots have damaged/broken the fossil. Often the pieces fit together very nicely and it is easy to glue the pieces together using cyanoacrylate glue. However, somethimes I end up with gaps that are 1-3 mm wide. I can fill these gaps with Apoxy sculpt and then paint the material. However, this is a pretty laborious process. I wonder if there is a better way. What do you normally use for filling cracks?
  23. Can across this one recently on our favorite auction site, a torvosaurus tooth from colorado. Though with no intention of buying especially at the high price tag it is at I have my suspicions, the seller claims it its 100% no repairs or restoration. Looking at the pictures I highly doubt it as it looks extremely repaired to me and some of it especially in the picture zooming into the tip reminds me of the little air holes found in fake cast trilobite. Idk how much is repaired or even if the whole specimen is fake, I'd be interested to hear what you guys think. Definitely a gigantic red flag to me.
  24. A new article from Geology of the Intermountain West: A preliminary report of the fossil mammals from a new microvertebrate locality in the Upper Jurassic Morrison Formation, Grand County, Utah Article https://www.utahgeology.org/openjournal/index.php/GIW/article/view/25 PDF https://www.utahgeology.org/openjournal/index.php/GIW/article/view/25/47
  25. Hi, I saw this tooth for sale labelled as Coelurus and it is from the Morrison Formation (Salt and Pepper Quarry - 14mm long). I just wanted to see others opinions about this id. I can't really see the serrations that well and there isn't much on the internet about Coelurus teeth. Would love to have a Coelurus tooth if this is true.
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