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  1. As a freshmen in College, I did a little extra credit report for my geology class about a controversial topic - Tyrannosauroidea diversity in the Southern Hemisphere during the Jurassic-Early Late Cretaceous periods. I was quite surprised at the amount of specimens I found. This diversity likely was the result of an early spread of the early tyrannosaur group Pantyrannosauria into Africa, Eurasia, and North America during the Jurassic and diversified once the land connecting these continents spread out more. Most of these species lived during the Early Cretaceous, though one or two exceptions
  2. I periodically get asked about 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 it's unknown how to describe them. Holotype skull Koparion douglassi Oldest known Troodontid and only known from a single maxillary tooth. Pictures says it all
  3. WOW a eureka moment..... a publication using specimens in private collections...so It can be done and should be done. My hats off the the authors and hopefully it sets off a new standard for publications. One of the authors is well known paleontologist Eric Buffetaut Abstract: Dinosaur remains found at the Vaches Noires cliffs (Calvados, Normandy) have usually been discovered by amateur palaeontologists. The bones come from carcasses which drifted away from a nearby land (Armorican Massif) during the upper Callovian and lower Oxfordian. Most of these bones belong t
  4. sharkysaurus

    What is this fossil?

    I found these two neat little fossils in La Junta, Colorado. I'm not sure what they are but I have two guesses what they might be: barnacles or fish scales. I think it's from the Morrison formation but I'm not 100% sure! Any help would be appreciated
  5. rodrex

    Talbragar plant or animal?

    Hi All, Anyone got an idea of if this is a fossil plant or animal? Cheers R
  6. Paper describes a large theropod from Uruguay represented by isolated teeth which resemble Ceratosaurus. I dont have access to this paper but it will be interesting to see the multvariate analysis results and be able to compare these teeth to those found in Portugal. What is interesting in the highlights is that they propose that the spinosaurid Ostafrikasaurus crassiserratus from Tanzania should be referred as a ceratosaurid theropod. Paywalled: https://www.sciencedirect.com/science/article/abs/pii/S0895981120303242
  7. Ceratosaurus is one of my favorite Jurassic theropod Dinosaurs found in the Morrison Formation. 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 the are accurately identified. 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. Some publications describe th
  8. Paper describes a new Jurassic carcharodontosaurian taxon, Lusovenator santosi, gen. et sp. nov. based on the reevaluation of previously described specimens from the Lusitanian Basin, Portugal. No dentary material was found For those not members of SVP its paywalled, https://www.tandfonline.com/doi/full/10.1080/02724634.2020.1768106
  9. I have found this crinoid ossicle from the Morrison Formation seems to be agatized alot like the bone from the formation does anyone know of any others found from the Morrison? have looked online but cant find anything even articles talking about it.
  10. Peat Burns

    Polish Ammonites

    Looking for assistance with the identification of these ammonites from Poland (either Niegowoniec or Odrodzieniec). Age is late Jurassic; Oxfordian. Orthosphinctes? Perisphinctes? The best that I can tell, the ribs on the big one are only bifurcate. Anyone have an idea from which formation they may have come? @Ludwigia
  11. Archie 00 00

    What fossil is this?

    It was found on a beach in conglomerate rock in Wenderholm Regional park near Orewa above Auckland in New Zealand. it is 20mm long and 8mm wide
  12. Ludwigia

    Split Shift

    I worked another split shift today, so I decided to use the 4 hours in between to visit the site in the ditch at the side of the road in the Danube valley once again. No sense in driving home and back again when your tools are anyway in the trunk. Rain had been forecast for the afternoon, but it looked ok for the time being, so off I went. It's about a 3/4 hour drive and everything was looking good until about 15 minutes before arrival when suddenly over the last hill there were dark clouds with even more darkness below them looming on the horizon. Good thing I brought my raincoat and rubber b
  13. Troodon

    New Stegosaur from Portugal

    Paper describes a largely complete specimen of Miragaia longicollum discovered in 1959 in Atouguia da Baleia, Peniche, Portugal, consisting of both anterior and posterior portions of the skeleton. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0224263
  14. 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
  15. 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
  16. A new sauropod-related paper is now available online: Philip D Mannion, Paul Upchurch, Daniela Schwarz, Oliver Wings; Taxonomic affinities of the putative titanosaurs from the Late Jurassic Tendaguru Formation of Tanzania: phylogenetic and biogeographic implications for eusauropod dinosaur evolution, Zoological Journal of the Linnean Society, , zly068, https://doi.org/10.1093/zoolinnean/zly068 Giraffatitan, Tornieria, and Dicraeosaurus are the best-known sauropods from the Tendaguru Formation, but the paper by Mannion et al. (2019) provides new insights into non-diplodo
  17. DD1991

    New choristodere from China

    A new paper you may find interesting: Ryoko Matsumoto, Liping , Yuan Wang & Susan E. Evans (2019). The first record of a nearly complete choristodere (Reptilia: Diapsida) from the Upper Jurassic of Hebei Province, People's Republic of China. Journal of Systematic Palaeontology (advance online publication) doi:Â https://doi.org/10.1080/14772019.2018.1494220 https://www.tandfonline.com/doi/full/10.1080/14772019.2018.1494220 Coeruleodraco is significant because it is the most complete Jurassic choristodere, considering that the exact relationships of Choristodera to o
  18. Ramon

    Fish tail?

    Hi, I went to the Tamazunchale area for Christmas break, and I bought this fossil from a local collector. He told me it was from some sort of aquatic animal. The sediments from the area are from the Pimienta, Santiago, and Taman formations. They represent Late Jurassic marine environments. Could this be a caudal fish fin (fish tail), or something else. I though it resembled part of a feather, but since they are marine sediments I doubt it.
  19. 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 pub
  20. Marshosaurus bicentesimus is a midsize theropod in the Morrison Formation in the Megalosauridae family. Over the past few years, teeth are becoming available in the open market simply because dealers/diggers are now more aware of this species and like to sell them. Isolated teeth from the Morrison Formation are very difficult to diagnose because of their similarity and all require an understanding of additional characteristics than normal, in hopes of properly identifying them. The best I can do is to look at other reference publications some which include similar teeth from Portugal and Ge
  21. Ludwigia

    Gravesia gigas ( Zieten 1830)

    From the album: Late Jurassic Ammonites from Southern Germany

    16cm. Late Jurassic, Tithonian, hybonotum zone. From a quarry in Emmingen-Liptingen.
  22. Heteromorph

    Archaeopteryx Could Fly

    I assumed that it was already confirmed that Archaeopteryx could fly but apparently this debate is just now coming to a close. It took awhile. Article 1: https://news.nationalgeographic.com/2018/03/archaeopteryx-flight-dinosaurs-birds-paleontology-science/ Article 2: https://gizmodo.com/new-evidence-suggests-archaeopteryx-could-fly-we-just-d-1823727562 The open access paper: https://www.nature.com/articles/s41467-018-03296-8
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