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Found 29 results

  1. Fish from Brazil

    Hi. Brand new here. Over 20 years ago I had a Chinese business colleague who traveled regularly to Brazil. He showed me a beautiful piece once when I was visiting him. A while later he brought me this fossil as a gift. I’ve always loved it but know very little about it. I’m sure this is familiar to you guys. Anything you can tell me about it would be deeply appreciated
  2. Gifted Fossils from South America

    Good Day! These fossils were a gift from a friend in the early 1980's. He was a world traveler and brought them to my family from South America. He has since passed so I can't ask him specifics. Clearly they are fish fossils, but that is all I can derive as a layperson. Are there other things that a more skilled person in the field could relay about them? Thank you for the information. The sizes are on the photos: The larger piece is 14.5 x 4.25 x 4 inches The smaller piece is 5.25 x 6.5 x 3.5 inches They are very heavy.
  3. Does anyone have a copy of these papers??? : Javier Párraga; Albert Prieto-Márquez (2019). Pareisactus evrostos, a new basal iguanodontian (Dinosauria: Ornithopoda) from the Upper Cretaceous of southwestern Europe. Zootaxa 4555 (2): 247–258. doi:10.11646/zootaxa.4555.2.5. PMID 30790960. Julian C. G. Junior Silva; Thiago S. Marinho; Agustín G. Martinelli; Max C. Langer (2019). Osteology and systematics of Uberabatitan ribeiroi (Dinosauria; Sauropoda): a Late Cretaceous titanosaur from Minas Gerais, Brazil. Zootaxa. 4577 (3): 401–438. doi:10.11646/zootaxa.4577.3.1. It's quite odd that despite being described as a distinct genus from Rhabdodon, Pareisactus is known only from one skeletal element. Therefore, it is highly probable that some very fragmentary rhabdodontid specimens from France and Spain assigned to Rhabdodon could be from Pareisactus (Matheronodon shows that more than one rhabdodontid lived in Europe during the late Campanian-Maastrichtian interval).
  4. Reconstruction of trilobite ancestral range in the southern hemisphere January 10, 2019, FAPESP https://phys.org/news/2019-01-reconstruction-trilobite-ancestral-range-southern.html http://agencia.fapesp.br/reconstruction-of-trilobite-ancestral-range/29527/ Carbonaro, F.A., Langer, M.C., Nihei, S.S., de Souza Ferreira, G. and Ghilardi, R.P., 2018. Inferring ancestral range reconstruction based on trilobite records: a study-case on Metacryphaeus (Phacopida, Calmoniidae). Scientific reports, 8(1), p.15179. https://www.researchgate.net/publication/328251419_Inferring_ancestral_range_reconstruction_based_on_trilobite_records_a_study-case_on_Metacryphaeus_Phacopida_Calmoniidae https://www.nature.com/articles/s41598-018-33517-5 Bolivian Trilobites - At The Top Of The World American Museum of Natural History https://www.amnh.org/our-research/paleontology/paleontology-faq/trilobite-website/trilobite-localities/bolivian-trilobites-at-the-top-of-the-world Gallery of the Devonian Trilobites of Bolivia https://www.amnh.org/our-research/paleontology/paleontology-faq/trilobite-website/trilobite-localities/bolivian-trilobites-at-the-top-of-the-world/gallery-of-the-devonian-trilobites-of-bolivia Yours, Paul H.
  5. the Cambrian of Argentina

    harrington cambrian1670-1739-1-PB.pdf Horacio J Harrington Paleontologia del Paleozoico inferior de la Argentina I: Las faunas del Cambrico medio de San Juan Revisto del Museo de La Plata,T II,pt 11(Paleontologia) less than 2,5 MB NOTE: in spanish edit: Diacritics omitted
  6. Devonian trilobites of Gondwana studied with newer mathematical models to determine evolutionary connections https://phys.org/news/2019-01-reconstruction-trilobite-ancestral-range-southern.amp
  7. I was looking through some fossils on an auction house website, when I saw some dinosaur eggs labelled as saltasaurus or argentinosaurus. Does anyone have any views on it?
  8. https://phys.org/news/2019-01-fossil-prehistoric-deer-argentina.html
  9. Who are you calling dimorphic

    Parent_1997-Geobios.pdf Ontogeny and Sexual dimorphism of Eurycephalites gottschei(Tornquist)(Ammonoidea) of the Andean Lower Callovian(Argentine-Chile) Geobios 30-3,30-6-1997 recommended? You bet!! Avoid if allergic to quantitative analytic data treatment
  10. ABSTRACT,but with pix ocampvajd48th_LPSC_Americabstra2466_Gomez2017_N2_impacrater_astroblpliocenozoicdiscovered_ysical_seismic_evidences_C.pdf 1,5 Mb Age: probably Pliocene
  11. NALMA, SALMA, GABI

    FLYKOwswish this article has some bearing on the following issues: Mammal biochronology,the precise timing and/or speed of the G(reat)A(merican)B(iotic)I(nterchange),it contains some remarks on mammal taxa(however brief), magnetostratigraphic resolution from the Miocene to the Pleistocene, the closing of the Panama isthmus, and the possible diachroneity of mammal taxon appearances. There are NO taxa illustrated,and the authors' (infrequent)use of "heterochroneity " is unfortunate . If you have Woodburne(2012): this might be up your alley I liked it,but I'm weird that way
  12. Compendium of Crabbiness

    Luport About 16,5 Mb The combined carcinological expertise makes this extremely interesting extended and comprehensive & useful bibliography
  13. Alright all you smarty pants, (and thats a good thing), i got this about 20 years ago with a batch of other teeth from south america. I have no idea as to what kind of tooth this is. Any help is greatly apppreciated. Thanks a ton. RB
  14. Track suite

    franchsichjurassdinosaurICHN_Tracks_in_the_Guara_For.pdf
  15. I found this paper from 2013. I don't know if this has been posted on the forum before, but I figured it could be pretty interesting for those interested in Theropods. https://www.academia.edu/9863538/Evolution_of_the_carnivorous_dinosaurs_during_the_Cretaceous_The_evidence_from_Patagonia Evolution of the carnivorous dinosaurs during the Cretaceous: The evidence from Patagonia abstract Patagonia has yielded the most comprehensive fossil record of Cretaceous theropods from Gondwana, consisting of 31 nominal species belonging to singleton taxa and six families: Abelisauridae, Noasauridae, Carcharodontosauridae, Megaraptoridae nov. fam., Alvarezsauridae, and Unenlagiidae. They provide anatomical information that allows improved interpretation of theropods discovered in other regions of Gondwana. Abelisauroids are the best represented theropods in Patagonia. They underwent an evolutionary radiation documented from the Early Cretaceous through to the latest Cretaceous, and are represented by the clades Abelisauridae and Noasauridae. Patagonian carcharodontosaurids are known from three taxa (Tyrannotitan, Giganotosaurus and Mapusaurus), as well as from isolated teeth, collected from Aptian to Cen- omanian beds. These allosauroids constituted the top predators during the mid-Cretaceous, during which gigantic titanosaur sauropods were the largest herbivores. Megaraptorans have become better documented in recent years with the discovery of more complete remains. Megaraptor, Aerosteon and Orkoraptor have been described from Cretaceous beds from Argentina, and these taxa exhibit close relationships with the Aptian genera Australovenator, from Australia, and Fukuiraptor, from Japan. The Gondwanan megaraptorans are gathered into the new family Megaraptoridae, and the Asiatic Fukuiraptor is recovered as the immediate sister taxon of this clade. Although megaraptorans have been recently interpreted as members of Allosauroidea, we present evidence that they are deeply nested within Coelurosauria. Moreover, anatomical information supports Megaraptora as more closely related to the Asiamerican Tyrannosauridae than thought. Megaraptorans improve our knowledge about the scarcely documented basal radiation of Gondwanan coelurosaurs and tyrannosauroids as awhole. Information at hand indicates that South Americawas a cradle for the evolutionary radiation for different coelurosaurian lineages, including some basal forms (e.g., Bicentenaria, Aniksosaurus), megaraptorans, alvarezsaurids less derived than those of Laurasia, and unenlagiids, revealing that Gondwanan coelurosaurs played sharply differing ecological roles, and that they were taxonomically as diverse as in the northern continents. The unenlagiids represent an endemic South American clade that has been recently found to be more closely related to birds than to dromaeosaurid theropods. Analysis of the theropod fossil record from Gondwana shows the highest peak of origination index occurred during the AptianeAlbian and a less intense one in the Campanian time spans. Additionally, peaks of extinction index are recognized for the Cenomanian and TuronianeConiacian time spans. In comparison, the Laurasian pattern differs from that of Gondwana in the presence of an older extinction event during the AptianeAlbian time-span and a high origination rate during the Cenomanian time-bin. Both Laurasian and Gondwanan theropod records show a peak of origination rates during the Campanian.
  16. The Llanvirn of Argentina

    ART 5.pdf As far as I could ascertain,not posted before.If I'm wrong sincere apologies to the previous poster outtakes: once again the same thing happens the upload takes too long ,and it goes wrong. Is anybody else experiencing difficulties when posting in "documents"? Case of butterfingers on my part?
  17. Find the source HERE. Additional Links: Discover Magazine.
  18. Is this a sponge fossil?

    Hello, my name is Andres. I found this in "La Pedrera beach" in Uruguay. At first I had no clue of what it was. I'm prone to think it is a sponge fossil, but would want help in this matter. I found it vaguely buried in the sand close to the shore. The sand of that beach is grainy and loaded with lots of shells of many mollusc species. If it is indeed a sponge fossil, what species it would be? Thanks in advance!
  19. Vertebrate taphonomy of Argentina

    Good piece from JVP colombi.pdf
  20. dinosaur feet

    good piece,and relatively new becpol.pdf
  21. Itsy Bitsy,part two

    The tags say it all. Why part two? Because I have posted on fossil spiders before. Downen_santanarthroparanealagerstcretacbrazilku_0099M_13777_DATA_1.pdf
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