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Found 4 results

  1. Dinosaur Tracks

    Thought I would share some of my Acrocanthosaurus tracks in my collection from Texas. These are from the Glen Rose Formation. Anyone who has dino tracks, please feel free to post them here on this thread too...would love to see them! The associated pair are big...both over 20 inches long.
  2. 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
  3. Dinosaur Saturday

    Hadrosaur carcasses must have been great hiding places for fishes during the Cretaceous. A beautifully preserved primitive sturgeon, in the belly cavity of a Brachylophosaurus skeleton. Thanks Jack Horner Here’s the holotype skull of Gorgosaurus libratus. This specimen was collected by Charles Sternberg from Dino Prov Park, Alberta & described by Lawrence Lambe, Canada’s first vertebrate palaeontolgist. Thanks Dave Evans Thigh bone and shin bone of a subadult Triceratops. The thigh is much longer than the shin making for a relatively short stride, suggesting Triceratops was very slow. T. rex was definitely faster than a trike & probably didn’t need to run to catch one. Compliments of Dave Evans. Wonderful skull of the very early dinosaur Eoraptor from the PVSJ collection in San Juan. It’s from the early Late Triassic Ischigualasto Formation. NHM Dinolab The theropod Coelophysis baur the State Fossil of New Mexico. This mass death assemblage depicts multiple individuals who died at the same time. Thanks Guy Leahy. Here’s a nice big T. rex tooth from Saskatchewan. Not the prettiest but from a cool location. D. Evans Acrocanthosaurus mount completed by the Black Hills Institute. Heading to the Netherlands Something you dont see often jaws of Iguanacolossus fortis. Its a genus of iguanodontian ornithopod dinosaur that lived in North America during the Early Cretaceous period from Utah . Jim Kirkland Dinossur material from Austria wow.... you are looking at the nodosaur Struthiosaurus austriacus, from the Campanian of eastern Austria. Represented by multiple individuals of different growth stages, here is the braincase and two spikes. Tom Raven
  4. The BHI provides us interesting backstories into many of the replicas they assemble for museums or private individuals. I find this one fascinating and thought I would share it with the forum. Photos and writeup by Pete Larsen. Began putting together a cast skull of the Oklahoma Acrocanthosaurus atokensis. The right side of the skull is pretty much pathology free. The left side of the skull, however, is quite a different story. You will notice that the left nasal and nasal process of the premaxilla show damage. But the “killer” is what happened to the maxilla. Notice the extensive damage and active bacterial infection behind the 5th maxillary tooth. 7 alveoli lost the ability to grow new teeth! Maxillary Teeth missing A look at the medial aspect shows the closed alveoli and extensive osteomyelitis. And, in the center of the photo, the answers to “what happened" When we were cleaning the skull, a chunk of bone broke off the maxilla, revealing a tooth from a crocodile - as reported by Sam Elliot’s character in Pixar’s “The Good Dinosaur”! My comments: So it appears that this Acrocanthosaurus got his lower jaw bitten by a Croc, left a gift, a tooth which most likely led to the jaw infection which may have resulted in its death or at least severely affected its lifestyle. Interesting how many skeletons we see that have injuries. Life in the Cretaceous was not easy.
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