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Found 15 results

  1. Largest theropods

    We all know that spinosaurus is most possible to be the largest theropod. Spinosaurus was not very tall (in the hip) but it probably was heavier and longest that tyrannosaurus, giga and carcha. But, what is the second biggest theropod ever? (only carnivorous, not herbivorous like deinocheirus). I think, that tyrannosaurus rex is the second biggest theropod ever. Giganotosaurus and carcharodontosaurus was longest that t. rex, but not tallest and heavier. Giraffe is taller that elephant, but elephant is the biggest terrestrial mammal. Argentinosaurus, supersaurus, patagotitan, diplodocus, was longest that blue whale, but blue whale is the biggest animal ever.
  2. By measuring endocasts of theropods, ancient and modern birds these researchers traced brain evolution in 2000 different species. Decrease in body size with same size brain led to increased brain:body ratio in modern birds after the K-T event. Work done at Stonybrook and the Bruce museum. https://phys.org/news/2020-04-history-brain-evolution-tyrannosaurs-modern.html
  3. Theropods from lightning Ridge

    Hi I’m wondering what Theropods are found in lightning Ridge Australia @Down under fossil hunter
  4. The Real Jurassic World Program

    Carter and I are starting to slowly begin work on a program that will be about Jurassic era Dinosaurs. We will not do this until the 2020/2021 school year and I am really pretty excited. We decided to stop pursuing other dinosaur fossils (except for a Hell Creek Anky/Nodo lol) so that we can start piecing this together. We have about 10 months to make this happen. Educationally speaking it will be awesome to focus a program on the Jurassic era and show kids what dinosaurs were really running around at this time. This presents some fun challenges for us as collectors. Morrison Formation fossils are harder to find and more expensive so this will be a pretty significant change in how we collect. We can bargain shop to some extent but we will have to get into a higher price range. Carter and I know we have to save our money and be patient. We will also have a much more limited number of sources which I am actually okay with. I really like our primary source for Jurassic stuff. I have to get familiar with this fossil material so I have to find and study whatever publications exist but this is something I really like. We may also take a look at a European Dino or two. I have seen some Sauropod fossils from the UK and some stuff from Portugal that was interesting though pricey. We have yet to hop across the pond for dinos yet but if we are ever going to do that, this would be the program to do it I think. We have a head start on this. We have our nice Diplodocus bone. We have a couple of nice Camarasaurus pieces too. We have a small piece of Stegosaur gular armor. We also have a partial Theropod tooth, sold as Allosaurus but in need of a closer look. It is not a lot of material for sure but we can build from what we have and develop a really solid program I think. Presenting a fairly complete fauna will be hard. The herbivores I am not too worried about. I have a line on a Camptosaurus piece and I am sure we can track down another nice large Sauropod fossil. Dryosaurus is another possibility. The Theropod material is quite intimidating though. Rare and expensive is my first impression. I am not too worried about Allosaurus but beyond that, I think it will be really challenging to find any other fossils in our price range. I think we need fossils from two large bodied and one medium or small theropod to really present a decent picture of the ecosystem. Tall order but I am hopeful we can do it. We have do have a long way to go with this for sure but we made a little progress. Literally speaking we made a tiny bit of progress but it is a pretty cool addition despite the diminutive nature of the fossil We secured ourselves a tiny 2mm Ornithopod tooth that could belong to Nanosaurus. We had asked @Troodon about this one awhile ago and that was his opinion. I finally got around to grabbing it. Nanosaurus is a great dinosaur to include for us because they were tiny and pretty cute. It will represent a great contrast with the giant dinosaurs of this era. Kids will love it. It was also in the bargain category price wise. We may not get to update this for awhile but I thought starting the TFF collection now would be a fun way to celebrate our tiny new fossil.
  5. Not sure if this is the correct place for this, but looking to see if I could get some verification (Is it real? Good quality?) etc as I’m fairly new to collecting.
  6. Theropod data for a computer science study.

    Hello I am working on my PhD in computer science and am working on collecting data for my thesis. I have been looking for a lot of data on theropod measurements like; teeth size, body mass, femur and tibia, length width, and other measurements (the more the better). I would like to collect samples from a few theropods like the T-Rex, Raptors, ect... and to have multiple skeleton for each. I need to have their measurement for my data points. I know that there are some journals that give detailed measurement for each fossil they find but I do not know how to search for them as each search yields vary results. Is there a certain key word that I should use to get the measurements for each fossil? I have been here https://paleobiodb.org/#/ but it does not look like the information that I need. Any help on this will be appreciated.
  7. A new book (out early 2019) is available online: https://www.amazon.com/gp/product/0691180318/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 I'm wondering if this book includes theropods described this year because I know that the Haarlem Archaeopteryx was recognized as the distinct genus Ostromia, and we know that Mahakala, Halszkaraptor, and Hulsanpes form a distinct clade of dromaeosaurids.
  8. I periodically get asked about smaller theropod teeth so this is what I know. If you have additional tooth related information please pass it on since very little is known or published. Tanycolagreus topwilsoni The holotype included a fragmented skull with one premaxillary and two lateral teeth. Unfortunately the teeth were crushed with no visible serrations so its unknown how to describe them. Holotype skull Reconstruction Skull of Marshosaurus from Utah Museum of Natural History. So you can see variation of the teeth in jaw If you are interested in finding out more about Holotype skeleton this book is the best around. Carpenter, K., Miles, C., and Cloward, K. (2005). "New small theropod from the Upper Jurassic Morrison Formation of Wyoming." in Carpenter, K. 2005. The Carnivorous Dinosaurs, Indiana University Press: 23-48 Koparion douglassi Oldest known Troodontid and only known from a single maxillary tooth. Pictures says it all. A tooth taxon! Scale: A 1 mm, B-F 100 micrometers Chure, D. J. (1994). "Koparion douglassi, a new dinosaur from the Morrison Formation (Upper Jurassic) of Dinosaur National Monument; the oldest troodontid (Theropoda: Maniraptora)." Brigham Young University Geology Studies, 40: 11-15 Hesperornithoides miessleri A new Troodontid. 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). The teeth are labiolingually compressed, and the enamel shows no trace of longitudinal grooves. Unfortunately the paper does not identify the sizes of these teeth. Distal Serration Density 5.5/mm FABL: around .45 https://peerj.com/articles/7247/ Coelurus fragilis Known from a fairly complete skeleton however there is a question if the dentary, below, belongs to the skeleton. No teeth were recovered and cannot find any additional information on teeth. Ken Carpenter recently responded to my inquiry about these teeth. He stated that we have no teeth from this dinosaur. Teeth have been called Coelurus because they are small but there is no proof of association Carpenter, K., Miles, C., and Cloward, K. (2005). "New small theropod from the Upper Jurassic Morrison Formation of Wyoming." in Carpenter, K. 2005. The Carnivorous Dinosaurs, Indiana University Press: 23-48 Ornitholestes hermanni Skull with both mandibles are part of the holotype. Osborn et. al (1917) paper just comments that the teeth are small and feeble. Carpenters book mentions that the skull is presently being studied by Mark Norell Carpenter, K., Miles, C., and Cloward, K. (2005). "New small theropod from the Upper Jurassic Morrison Formation of Wyoming." in Carpenter, K. 2005. The Carnivorous Dinosaurs, Indiana University Press: 23-48 Reconstructed Skull AMNH Osborn, Henry Fairfield (1917). "Skeletal adaptations of Ornitholestes, Struthiomimus, Tyrannosaurus". Bulletin of the American Museum of Natural History. 35 (43): 733–771. hdl:2246/1334. Allosaurus Needs to be developed, in the queue Torvosaurus Ceratosaurus Marshosaurus
  9. Theropod dinosaur teeth are usually ziphodont, but the morphology of the denticles varies between species and clades. Gorgosaurus (a tyrannosaurid) and Dromaeosaurus (a dromaeosaurid) both have rectangular denticles despite differences in body size and shape and tooth size. Saurornitholestes (a dromaeosaurid) has pointed denticles that, over time, can wear down to resemble those of Dromaeosaurus. Troodontids (like Troodon) have unique hooked denticles that differ significantly from those of dromaeosaurids. Paper looks at the biomechanics of these different morphologies, not for everyone but interesting. https://www.cell.com/current-biology/fulltext/S0960-9822(18)30371-3
  10. Ok this might be the most stupid question you have even had on here but it's bugging me and can't seem to get any good pages or images on google, and it is basically to do with the scapula and coracoid, how would it have been attached to the main skeletal system of theropods? as from looking at museum's and models it seem like it is just slapped on the side of the ribs which would not have provided much support or structure, and with sauropods would it have been attached to fused vertebrae like it would be for sacral vertebrae? Thanks for you time to read this. Matt
  11. Periodically you see theropod material offered for sale from Patagonia and to a collector that's awesome. Typically its specimens obtained before the embargo laws went into affect from Argentina. My experience in looking at what has been offered is that it's often mis-identified as to locality, age and species. Sellers put commonly known dinosaurs identification tags to their specimen like Carnotaurus with complete disregard to the actual age and locality of where that dinosaur was described. That may simply be the information provided to them but they don't verify it and it's easy to do. The reality is that theropod diversity in Patagonia is huge, over vast collecting areas, several provinces, numerous formations and ages. Understanding theropods from this region is just beginning and little is understood, sound familiar Identification of isolated teeth unless there is something diagnostic about the tooth is virtually impossible. I have a difficult time accepting the notion that local diggers knew all the science around what they were collecting, maintained accurate records and provided detailed information to foreign buyers. It was all about the Peso. A recent publication sheds some light on discoveries and I've attached a couple of images to help with diagnosis of the locality and age of specimens you may see offered for sale. Material from this region is very cool but be careful, don't let emotion take over. Just make sure it's was legally acquired and be prepared to identify it as Theropod indet. and don't be fooled that the name offered is valid. Be happy you're just having the opportunity to acquire such a rare specimen. Evolution of the carnivorous dinosaurs during the Cretaceous: The evidence from Patagonia Fernando E. Novas, Federico L. Agnolín, Martín D. Ezcurra, Juan Porfiri, Juan I. Canale
  12. This new analysis of dinosaurs and their near relatives, published today in the journal Nature, concludes that the ornithischians need to be grouped with the theropods, to the exclusion of the sauropodomorphs. It has long been known that birds (with their obviously ‘bird-like’ hips) evolved from theropod dinosaurs (with their lizard-like hips). However, the re-grouping of dinosaurs proposed in this study shows that both ornithischians AND theropods had the potential to evolve a bird-like hip arrangement- they just did so at different times in their history. http://www.nature.com/nature/journal/v543/n7646/full/nature21700.html http://www.nature.com/news/dinosaur-family-tree-poised-for-colossal-shake-up-1.21681 http://www.cam.ac.uk/research/news/new-study-shakes-the-roots-of-the-dinosaur-family-tree http://www.sciencemag.org/news/2017/03/t-rex-gets-new-home-shakeup-dino-family-tree
  13. Theropods teeths

    Theropods teeths form my collection Form left to right its Ceratosaurus dentisulcatus tooth from Lourinha formation Allosaurus rooted tooth from Morrison formation Juvernile Tyrannosaurus rex partial rooted tooth from Lance formation Deinonychus antirrhopus tooth from Cloverly formation Allosauridae tooth from Lourinha formation Timurlengia Euotica tooth from Bissekty formation Enjoy.
  14. Tyrannosaurid cladistics

    reasonably new,don't know if it's been posted yet http://www.pnas.org/content/113/13/3447.full.pdf
  15. All of may not know this, but the Middle Jurassic La Boca Formation in Mexico boasts the most important Middle Jurassic tetrapod fauna in North America outside the US. Among the notable fossils found in the La Boca Formation are primitive mammals, sphenodonts, and even archosaurs (incl. the pterosaur "Dimorphodon" weintraubi and an unnamed mesoeucrocodylian). When compared to other Middle Jurassic faunas, it's interesting that the tritylodont Bocatherium is roughly the same age as the other two Middle Jurassic tritylodonts Bienotheroides and Stereognathus. As some of the components of the La Boca Formation vertebrate assemblage are related to their counterparts in China and Europe (e.g Bocatherium), future discoveries in the La Boca Formation could provide a new window into the biogeographic origin of the Morrison fauna, and it's not implausible that the Morrison fauna may have originated in Patagonia. Clark, James; Montellano, Marisol; Hopson, James A., Hernandez, Rene; & Fastovsky, David A. (1994). "An Early or Middle Jurassic tetrapod assemblage from the La Boca Formation, northeastern Mexico". In Fraser, N.C.; and Sues, H.-D. (Eds.). In The Shadow of the Dinosaurs: Early Mesozoic Tetrapods. Cambridge: Cambridge University Press. pp. 295–302.