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  1. ThePhysicist

    Tyrannosaurid vs Dromaeosaurid

    From the album: Hell Creek / Lance Formations

    As a theropod tooth aficionado, I thought it useful to compare two families present in the Hell Creek Formation. They become increasingly difficult to distinguish as they get smaller, but this graphic presents some features which may be used to differentiate them on two similarly-sized exceptional specimens. Keep in mind there is some variability due to position, ontogeny, etc., so it's beneficial to study more than one tooth for each family.
  2. Marco90

    Spinosaurus aegyptiacus

    From the album: My collection in progress

    Spinosaurus aegyptiacus Stromer 1915 Location: Kem Kem Beds, Morocco Age: 95 Mya (Cenomanian, Upper Cretaceous) Measurements: 7x2 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Reptilia Subclass: Diapsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Family: Spinosauridae
  3. Mahnmut

    Oviraptorid

    From the album: Skeleton models

    Upper cretaceous of Mongolia, mostly handmade using parts of different models, skull sculpted digitally

    © Jan Frost

  4. Mahnmut

    spinosaurus

    From the album: Skeleton models

    Upper cretaceous of northern Africa Model handmade

    © Jan Frost

  5. Mahnmut

    Majungasaurus

    From the album: Skeleton models

    Upper cretaceous Madagascar Modified elenco T-rex

    © Jan Frost

  6. ThePhysicist

    Bull Canyon Theropod?

    Hi y'all, found this partial tooth in micromatrix from the Triassic-aged Bull Canyon formation. Serration density looks to be 9-10 / mm on the dc. Could it be dinosaurian?
  7. ThePhysicist

    Theropod

    From the album: Aguja Formation

  8. ThePhysicist

    Theropod tooth fragment

    From the album: Aguja Formation

    Finally, a theropod! It's just a fragment, however.
  9. PointyKnight

    Kem Kem Notosuchian or Theropod?

    Hey everyone! I just received a few teeth from the Kem Kem Beds near Taouz, Morocco. Among them one has me particularly stumped - I’ll do my best to provide as much information as possible, but let me know if more is needed! The tooth was listed as a theropod, though even the seller thought that assignment was only tentative. Its total height is 14mm. As the pictures above show, it’s moderately recurved as well as slightly curved lingually, with very distinct flutes running the whole length of the crown, 6 lingually and 9 labially, with the lingual flutes a
  10. Praefectus

    Tyrannosaur Tooth

    Premaxillary tooth EDIT: Changed from Tyrannosaurus rex to Tyrannosaurid indet.
  11. A ‘Jurassic Park’ icon was so much different in real life, BRG_Com https://bgr.com/2020/07/08/dilophosaurus-jurassic-park-study/ Famous Jurassic Park Dinosaur Was More Powerful than Previously Thought, Sci News, July 9, 2020 http://www.sci-news.com/paleontology/dilophosaurus-wetherilli-08620.html The paper is: Marsh, A., & Rowe, T. (2020). A comprehensive anatomical and phylogenetic evaluation of Dilophosaurus wetherilli (Dinosauria, Theropoda) with descriptions of new specimens from the Kayenta Formation of northern Arizona.
  12. New Feathered Carnivorous Dinosaur Found in Brazil by Enrico de Lazaro, Sci.News, July 14, 2020 http://www.sci-news.com/paleontology/aratasaurus-museunacionali-08633.html Fossilised foot of a three-toed dinosaur that lived in Brazil 115 million years ago is identified as belonging to a new species that may be a forerunner of today's birds. Daily Mail https://www.dailymail.co.uk/sciencetech/article-8517113/Fossilised-foot-three-toed-dinosaur-lived-Brazil-115-million-years-ago-found.html The open access paper is: Sayão, J.M.,
  13. doushantuo

    Carnotaurus

    1-s2.0-S1631068319301824-main.pdf novel information on the endocranial morphology of the abelisaurid theropod Carnotaurus sastrei Mauricio A Cerroni,Ariana Paulina Carabajal
  14. Everyone probably knows the theropod distal femur from the Taynton Limestone Formation of Oxfordshire that was illustrated by Robert Plot in 1677 and thought to be from a Roman war elephant or biblical giant, and which was dubbed " humanum"* by Richard Brookes in 1763. However, even though the femur illustrated by Plot (now missing) has often been considered to belong to Megalosaurus, but as noted in Halstead and Sarjeant (1993), this femur might belong to a theropod other than Megalosaurus, as Duriavenator, Magnosaurus, Iliosuchus, and Cruxicheiros co-existed lived in the same time and region
  15. doushantuo

    the caenagnathid dentary

    caen7-18703-1.pdf Published: 10 January 2018 Reevaluation of the Dentary Structures of Caenagnathid Oviraptorosaurs (Dinosauria, Theropoda) Shuo Wang, Qiyue Zhang & Rui Yang Nature Scientific Reports volume 8, Article number: 391 (2018) form the abstract: "The 3D images of dentary interior spaces suggest that while tooth reduction progresses, the empty alveoli are partially modified into structures accommodating blood vessels that nourish the rhamphotheca, probably representing a functional compensation for the insufficient blood supply in toothed jaw bon
  16. link Reassessment of a juvenile Daspletosaurus from the Late Cretaceous of Alberta, Canada with implications for the identifcation of immature tyrannosaurids Jared T.Voris, Darla K. Zelenitsky, François Therrien & Philip J. Currie NATURE Scientific Reports | (2019) 9:17801 | https://doi.org/10.1038/s41598-019-53591-7
  17. doushantuo

    it's what you wear

    Tooth wear and microwear of theropods from the Late Maastrichtian Marılia Formation (Bauru Group), Minas Gerais State, Brazil Carlos Roberto A. Candeiro, Philip J. Currie, Caio L. Candeiro and Lılian P. Bergqvist Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 106, 229–233, 2017 candeircurriedinosaattriboldentittooth_wearcretac_theropods_maastrichtianmminasgeraisbrazil.pdf
  18. doushantuo

    (cello riff) large SPINOSAURUS

    bsgf_2018_189_4-6_170015.pdf BSGF - Earth Sciences Bulletin 2018, 189, 15 Large-sized theropod Spinosaurus: an important componentof the carnivorous dinosaur fauna in southern continents during the Cretaceous Carlos Roberto A. Candeiro, Lívia Motta Gil and Pedro Ernesto Pontes de Castro
  19. doushantuo

    dinosaurs down under:Theropoda

    LINK about 4,5 MB New megaraptorid (Dinosauria: Theropoda)remains from the Lower Cretaceous Eumeralla Formation of Cape Otway, Victoria, Australia Stephen F. Poropat, Matt A. White, Patricia Vickers-Rich & Thomas H. Rich Journal of Vertebrate Paleontology, 39:4, e1666273, Tetanurae sensu Gauthier: "includes birds and all other theropods that are closer to birds than they are to Ceratosauria"
  20. Mechanisms of soft tissue and protein preservation in Tyrannosaurus rex Elizabeth M. Boatman, Mark B. Goodwin, Hoi-Ying N. Holman, Sirine Fakra,Wenxia Zheng, Ronald Gronsk & Mary H. Schweitzer NATURE Scientific Reports | (2019) 9:15678 | https://doi.org/10.1038/s41598-019-51680-1 natu about 9 MB
  21. PointyKnight

    Hell Creek Metatarsal Joint Fragment

    Hey everyone, I recently came across this fossil online. It was listed as a metatarsal joint fragment, which to me checks out, but the person further identified it as a Dromaeosaurid [though they didn't specify based on what characters] and tentatively assigned it to Dakotaraptor based on size. Now I was wondering: Can remains this fragmental even be reliably distinguished from the other small- to medium-sized theropods in Hell Creek? The fossil was found in Hell Creek deposits in Wyoming [no info on the exact location], measures 30.9 x 27.5mm [not specified along which sides], and
  22. Hi! I recently aqcuired quite a lot of "microfossils" to kick off my Triassic collection, as I personally find it one of the most interesting time periods and while I am aware possibly not all of them are ID'd correctly I just wanted to get some nice fossils from this time period regardless of their ID's. All the fossils I acquired are from the Bull Canyon Formation, Dockum Group, San Miguel County, New Mexico, USA (Norian age) But I myself am not very knowledgeable yet in this material as I just started my collection but I am aware that some if not most of the ID's on these fossils
  23. Anomotodon

    French ?Spinosaurid

    From the album: Dinosaurs and Reptiles

  24. Jaimin013

    Allosaurus sp.

    From the album: My Collection

    Allosaurus sp. Morrison Formation Upper Jurassic Moffat County, Colorado Size: 6cm
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