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Found 14 results

  1. Morrison Formation Theropods

    Hey everyone, How do you tell the difference between the teeth of theropods from the Morrison formation, such as Allosaurus, Torvosaurus, Marshosaurus, and/or Ceratosaurus? Any information is appreciated! Thanks!
  2. Theropod tooth?

    Hi everyone, I just obtained my first non-Moroccan theropod tooth. It's from the Morrison formation and measures 1 and 3/8ths of an inch. I assume it is from an Allosaurus, because of how common Allosaurus is in the Morrison, but the rarer Torvosaurus and Ceratosaurus are the only other possibilities. It would be interesting to hear some opinions, however the lack of visible serrations presents some problems. @Troodon Thanks in Advance!
  3. Isolated teeth from the Tacuarembó Formation of Uruguay have revealed the first Megalosaurid from South America. The teeth have strong resemblance to Torvosaurus and as such the Megalosaur from Uruguay and Tanzania are suggested to be from Torvosaurus. It is paywalled but the abstract describes the features of the teeth. https://www.sciencedirect.com/science/article/abs/pii/S089598111930505X
  4. Made it to the second week 2020 whoopeee lets celebrate with some cool photos of extraordinary fossils. If you have a photo to contribute please do so. Skull of Duriavenator hesperis, a Middle Jurassic theropod dinosaur from England. Torvosaurus tooth from the Upper Jurassic of Portugal, Lourinha Formation. 15 cm in length is one of the largest theropod teeth known on the Upper Jurassic fossil record by Elisabete Malafaia This is the holotype of the hadrosauroid "Orthomerus dolloi" from The Netherlands. Courtesy of Susie Maidment Macroelongatoolithus clutch from South Korea. Maybe Gigantoraptor-sized oviraptors laid these big elongated eggs. 61 cm eggs have been published from this site. A gryposaurus notabilis skull at Museum of Nature. Loving the big honking nose on this duck-billed, Erika Anderson Tom Cullen shows us some Ornithomimid dinosaur skulls at the ROM Jaw of Acrocanthosaurus from Texas Holotype of Nanotyrannus lancensis at Cleveland Museum Photos of USNM 4928, on display the CU Museum of Natural History, Boulder. This is the holotype for Triceratops calicornis, and was collected by J.B. Hatcher in the Lance Formation of Niobrara County, Wyoming in 1888 Nanotyrannus Skull of the Dueling Dinosaurs in Montana
  5. I recently saw this torvosaurus, (i'm guessing tanneri) tooth. it measures 4.25 inches long and is partially rooted. Is this unusually large and rare for this dinosaur? It is from wyoming but isn't torvosaurus tanneri from the Dry Mesa quarry in colorado? Edmarka rex is similar to torvosaurus and its remains were found in wyoming so am i right in saying this tooth could belong to it? How does it look? Thanks in advance.
  6. I recently saw this torvosaurus tooth and bone chunks for sale online. How does it look and could it be edmarka? Also how rare is this? Here is the description:Measurements (In matrix): ~ 6-1/2" long x 4" wide x 2" thick Measurements: ~ 3-1/4" long x 1-1/2" wide x 3/4" thick Location: Morrison Formation, Red Canyon Ranch, Bighorn County, Shell, Wyoming Time period: Late Jurassic , 150 MYO.
  7. Carnivorous theropod claw

    Correct me if I'm wrong, but this is definitely not the end of a digit from a large carnivorous theropod. The only potentials from the Morrison formation where it was found, would be different species of ceratasaurs, allosaurs, and torvosaurus, right? and they, along with most carnivorous theropods have claws at the end of every digit, including the little foot&heel stubbies, don't they? wouldnt this have to be from something without claws? Or at least no claw on this?
  8. Torvosaurus tanneri is one of the apex theropods found in the Morrison Formation and has the largest dentition. Teeth of this and other theropods are commonly sold through online Dealers, Auction Houses and at Fossil shows. Just because a site/dealer sells Jurassic material does not guarantee accuracy. Variation of the teeth in the jaw also adds to the complexity. Isolated teeth from the Morrison Formation are very difficult to diagnose and all require an understanding of additional characteristics than normal, in hopes of properly identifying them. I have not been able to find any publication that describes the teeth of this species so it's beyond me how Sellers identify them other that they are big and look like Rex . The best I can do is to look at reference publications which include similar teeth from Portugal which describes Torvosaurus cf. gurneyi. Should be pretty close to Torvosaurus tanneri of the Morrison. Sellers need to provide you the following information: 1)Photo of tooth both sides and one of the mesial edge 2)Serration density of both edges, 5 mm wide at midline 3)Dimensions: CBL, CBW, CH 4)Locality: State and County Mesial teeth CHR : appox 2.75 Crown height ratio CH÷CBL CBR : appox .65 Crown base ratio CBW÷CBL Mesial Density: 7 to 8 per 5 mm, Distal Density: 7 to 8 per 5 mm all at midline. DSDI = 1 ( DSDI : Denticle size density index = Mesial Density ÷ Distal Density) Mesial and distal denticles decrease in size towards the base of the crown and similarly towards the crown apex. Mesial serrations occupy 55 to 65% of the crown height Distal serrations extend to below the cervex Cross-section base : sub-circular Lateral teeth CHR : 1.4 (short crowns), 2.8 (elongated crowns) Crown height ratio CH÷CBL CBR : .35 to .65 Crown base ratio CBW÷CBL Mesial Density: 6 to 9.5 per 5 mm, Distal Density: 6 to 9.5 per 5 mm all at midline. DSDI = 1 ( DSDI : Denticle size density index = Mesial Density ÷ Distal Density) Mesial serrations occupy 40 to 80% of the crown height Distal serrations extend to below the cervex Wide transverse undulations covering most of the tooth are common Isolated tooth of Torvosaurus cf. gurneyi in lingual (C1), labial (C2), mesial (C3), and distal (C4) views, with details of mesial (C5) and distal (C6) denticles, and enamel texture (C7) in lateral views. Reconstruction Skull of Torvosaurus from Utah Museum of Natural History. So you can see variation of the teeth in the jaw Reference: Hendrickx, C., Mateus, O., and Araújo, R. 2015. The dentition of megalosaurid theropods. Acta Palaeontologica Polonica 60 (3): 627–642.
  9. 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.
  10. Torvosaurus gurneyi tooth

    From the album Dinosaur teeth

    Torvosaurus gurneyi Jurassic Lourinhã Formation Peniche, Portugal
  11. From the album Dinosaur Fossils collection

    My collection of Late Jurassic & Early Cretaceous dinosaur fossils: Torvosaurus tooth from Wyoming, Falcarius utahensis hand claw from Utah, Suchomimus tooth from Niger and Allosaurus fragillis tooth from Wyoming
  12. Torvosaurus tooth

    From the album Dinosaur Fossils collection

    Torvosaurus tooth Locality: Morrison Formation, Big Horn Basin, Wyoming, USA Geological Age: Late Jurassic (145 MYA) Specimen Size: 2.5" Note: 1/2" tip restoration
  13. Torvosaurus tooth

    From the album Dinosaur Fossils collection

    Torvosaurus tooth Locality: Morrison Formation, Big Horn Basin, Wyoming, USA Geological Age: Late Jurassic (145 MYA) Specimen Size: 2.5" Note: 1/2" tip restoration
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