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Showing results for tags 'late jurassic'.
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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
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Publication on French Jurassic Dino's using PRIVATE collections FANTASTIC
Troodon posted a topic in Fossil News
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 -
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
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Hi All, Anyone got an idea of if this is a fossil plant or animal? Cheers R
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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
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- tacuarembó formation.
- uruguay
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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
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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
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A new ichthyosaur-related paper is available online: Nikolay G Zverkov and Megan L Jacobs. 2020. Revision of Nannopterygius (Ichthyosauria: Ophthalmosauridae): reappraisal of the ‘Inaccessible’ holotype resolves a taxonomic tangle and reveals an obscure ophthalmosaurid lineage with a wide distribution. Zoological Journal of the Linnean Society zlaa028. DOI: 10.1093/zoolinnean/zlaa028 The description of Nannopterygius borealis from the Arctic circle and the synonymization of the Kimmeridgian-Tithonian genera Paraophthalmosaurus and Yasykovia with Nannopterygius offers ne
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Are crinoids known or been found from the Morrison Formation?
DJandLIMON111 posted a topic in General Fossil Discussion
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.- 12 replies
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From the album: Morrison Formation Crinoid ossicle
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From the album: Morrison Formation Crinoid ossicle
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From the album: Morrison Formation Crinoid ossicle
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Excellent video on the Morrison formation...its part one of a three part series. Recommended to all those interested in the late Jurassic of North America.. educational, good introduction to the Morrison Fm.....opinions offered in the video might not be shared by all paleontologists, but thats typical...enjoy its good https://t.co/pzMTB7wMOc?amp=1
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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
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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
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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
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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
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- miragaia longicollum
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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
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- hesperosaurus
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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
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Hi, Does anyone have copies of the following papers regarding Pliosaurus: Gasparini, Z., and O'Gorman, J., 2014. A new species of Pliosaurus (Sauropterygia, Plesiosauria) from the upper Jurassic of northwestern Patagonia, Argentina. Ameghiniana; 51 (4): 269-283 O’Gorman, J., Gasparini, Z., & Spalletti, L. (2018). A new Pliosaurus species (Sauropterygia, Plesiosauria) from the Upper Jurassic of Patagonia: New insights on the Tithonian morphological disparity of mandibular symphyseal morphology. Journal of Paleontology, 1-14. doi:10.1017/jpa.2017.82
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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
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- wamweracaudia
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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
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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.
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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
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- late jurassic
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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
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