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Found 24 results

  1. Does anyone have a copy of the following paper: MARTIN V. & BUFFETAUT É. 1992. Les iguanodons (Ornithischia – Ornithopoda) du Crétacé inférieur de la region de Saint-Dizier (Haute-Marne). Revue de Paléobiologie 11: 67-96.
  2. Edwards Formation Rudist Identification

    A few weeks after my mother found her most recent cidarid in an Edwards formation check dam, I took a few minutes to swing by the same dam to see for myself what else could be found. Within minutes I dug up a cylindrical fossil that for a few weeks puzzled me due to its resemblance to a belemnite phragmocone. Then on Wednesday night I went to the DPS meeting and afterwards met briefly with Professor Andy Gale and showed him this specimen. He identified it as a rudist and immediately corroborated that with another DPS member familiar with rudists. What confused me is that it doesn't look like any of the other rudists that I have found in the Edwards. So far in my research I have found there to be 4 predominant rudist genera in the Edwards, which are listed in the tags. From pictures online I can't seem to definitively match this fragment to any of them, but it at least resembles some caprinid rudists I have seen online that are not from the Edwards. I know there must be many more rudist genera in the Edwards that I am unaware of, so I am hoping anyone more familiar with rudists than me could at least narrow it down to more than just a likely caprinid. The specimen is 3.75 cm long (Fig. 1), 4.2 cm in diameter at its concave end (Fig. 20), and 4.1 cm in diameter at its flat end (Fig. 22). I really know next to nothing about them so any help is appreciated. If anyone wants to compare this with the many other rudists that I have found from these Edwards dams, see the excessive amount of pictures in this thread. Fig. 1. Fig. 2.
  3. Edwards Check Dams

    A few weeks ago my mother, Stella (dog), and I went to a old-reliable heteromorph site in the Atco. After I dragged all my equipment to the part of the site that I was going to work, she went walking with Stella to look at some of the check-dams full of brought in Edwards limestone, chicken wire bags full of the brought in matrix put in the ditches for sediment control. In 2017 while we were at the same Atco site she was looking at a dumped pile of the Edwards and found a rare cidarid (see thread here) that compares well with Temnocidaris (Stereocidaris) hudspethensis. The sight of seeing that bizarre looking fossil just laying on the ground was quite a shock for both of us and motivation to hunt the dams more, and since then she has been casually looking over every check-dam hoping for another one. But because this Atco site is also rich in heteromorphs, I tend to focus all my attention on the chalk and neglect the Edwards dams, in these cases to my slight ire but also amazement at what she found with Stella. She did it again on the 9th, and found another cidarid that appears to be the same species as the last one from 2017, though from a different dam. I was at my Atco pile when she came over and showed it to me, completely blowing away all my finds in a very welcome way. The brought in Edwards is early upper Albian in age (about 107.6 mybp) and is a very fossiliferous crystalline limestone jammed packed with rudists and Chondrodonta sp. as well as the occasional gastropod. It makes for quite the sensory overload when trying to look for other things amongst the fossiliferous morass. The limestone is also interspersed with somewhat softer red sandstone that infills crevices in the much harder limestone and is more quickly weathered away in older exposures. I have tried so-far unsuccessfully to isolate the quarry from which the matrix originated to ask them permission to get a chance at the fossils before they are dumped in bags and hauled tens of miles to sites, damaging them. The problem is that there are multiple quarries in the nearest counties that expose the Edwards, namely Hood and Johnson counties. I have seen this matrix at sites all over North Texas, but I don't know if all that matrix is from the same quarry as the matrix from my Atco site since the Edwards is heavily quarried for fill all over the state. For now we are left to dig though the jumbled, knocked around bagged matrix, but even so the limestone is extremely hard so the fossils are not usually completely destroyed. And the site is big with lots of busted open bags. This latest cidarid is in about the same condition as the first, that being not so great but not so bad. Both specimens are missing most of their adoral sides and their apical plates are gone, leaving their circular apical scars. But they are still quite nice and intricately detailed, and also preserve some of their big mamelon tubercles, with the first specimen preserving 2 and the latest preserving 5, though there could be more under the globs of matrix stuck to them. This latest is also bigger. The first had a diameter of 52 mm at the ambitus and a preserved height of 37 mm, while the latest is 59 mm at the ambitus and 45 mm in height, though keep in mind that since they are both missing most of their adoral sides they would have had more height in life. The apical scar on the first specimen is 19 mm in diameter and on the second is 21 mm, with the crushed calcite fragments of the apical plates seen in the cavities left behind on both. I really didn't expect her to find another specimen of this rarity again, but apparently this matrix is a honey hole brought in by the truck load, making this site two honey holes in two epochs. Then on Wednesday I went by the same check dam from which this latest cidarid came and found what really appears to be a belemnite, but that is for another topic in the ID forum. Hopefully I can post that find soon. Since new Atco exposure at the site has temporarily slowed down I have an excuse to take a good hard look at the Edwards dams tomorrow afternoon. If we find anymore from the dams I will post it to this thread, so hope to see more In the mean time, here are the pictures of the echinoids, the check dam from which this latest specimen came, and a nifty Chondrodonta sp. she found in said dam. I welcome any other finds that anyone has found in the Edwards or its equivalents and any tips on how to prep limestone as hard as crystalized concrete. Also, sorry for the picture quality. My Nikon decided to die a few months ago for some reason and I have yet to get it fixed, so if anyone knows a camera repair shop that fixes Nikons in the DFW area, I am all ears. *Pictures incoming, computer acting up*
  4. Mongolostegus paper

    Hi, Does anyone have a copy of this paper: T. A. Tumanova & V. R. Alifanov (2018) First Record of Stegosaur (Ornithischia, Dinosauria) from the Aptian-Albian of Mongolia. Paleontological Journal 52(14): 1771-1779. DOI: https://doi.org/10.1134/S0031030118140186 https://link.springer.com/article/10.1134/S0031030118140186 If a copy is available, then I'd appreciate it if they send me one, because of the high cost of purchasing online access at Springer.com, but also because it's clear that Mongolostegus is the stegosaur that Ulansky informally named "Wuerhosaurus mongoliensis".
  5. New Giant Pliosaur, Columbia

    This paper came out in December, did a search but could not find any previous posts. My apologies if it's already been posted. Meet Sachicasaurus vitae, the newest giant pliosaur, an almost 10 m (35 ft) goliath from early Cretaceous, 130 Ma from what is now Colombia. https://www.researchgate.net/figure/Sachicasaurus-vitae-gen-et-sp-nov-holotype-MP111209-1-Photograph-and-schematic_fig2_331043547 Photos by Jim Kirkland
  6. One if my favorite and cool dinosaur groups are alvarezsaurian with their unique forelimb. Here we have two new species being described from the early cretaceous of China, Xiyunykus pengi and Bannykus wulatensis. https://www.cell.com/current-biology/fulltext/S0960-9822(18)30987-4#.W370yzRIRZ4.twitter One of the first informational Topics I put together
  7. Xenoposeidon proneneukos is a sauropod dinosaur from the Early Cretaceous Hastings Group of England. It is represented by a single partial dorsal vertebra, NHMUK PV R2095, which consists of the centrum and the base of a tall neural arch. https://peerj.com/articles/5212/ Taylor MP. (2018) Xenoposeidon is the earliest known rebbachisaurid sauropod dinosaur. PeerJ 6:e5212
  8. Possible Maryland Arundel formation find

    Hi Guys, Thanks for the help on the Sturgeon ID last night folks. I have one more for you tonite, I acquired a supposed Possible early Cretaceous item from Prince George’s County Maryland. Anyway I could definitely use some help on this peculiar looking fossil. Thanks in advance folks I know somebody on the forum can nail this Alien looking creature down. The Cliff Dweller
  9. New Dinosaur from Arkansas

    A new species of dinosaur unique to Arkansas is being recognized by the scientific world thanks to an article published in today's Journal of Vertebrate Paleontology. Its an Ornithomimosaur called Arkansaurus fridayi and based on a metatarsal and partial foot. http://www.arkansasmatters.com/news/local-news/its-official-new-arkansas-dinosaur-named/1058934863 Paper for SVP members https://www.tandfonline.com/doi/abs/10.1080/02724634.2017.1421209?journalCode=ujvp20
  10. New Ankylosaur from China

    Paper describes the first definitive and the best preserved ankylosaurid dinosaur ever found in southern China, Jinyunpelta sinensis. Check out that weird hexagonal tail colub https://www.nature.com/articles/s41598-018-21924-7
  11. Short article on Victoria's dinosaurs that dealt with prolonged periods of darkness and below freezing temperatures. Analysis was based on looking at bone microstructures. https://phys.org/news/2018-01-australia-polar-dinosaurs.html Paper https://www.nature.com/articles/s41598-018-19362-6
  12. Utahraptor Project

    Trapped in an 18,000-pound block of quicksand now turned to stone is a hidden treasure of well-preserved Utahraptor fossils. Utahraptor ostrommaysorum is a large (around five meters or 18 feet long), feathered, predatory theropod dinosaur from Utah’s early Cretaceous (~124 million years ago). Utahraptors sported huge sickle claws on their second toes, with the largest specimen measuring at 22 cm (8.7”) long. Utahraptor is a dromaeosaurid dinosaur — popularly called “raptors” based on the Jurassic Park movie franchise shorthand for it's sickle-clawed stars. The illustration below shows the suspected setting for the origin of this amazing fossil block. Bones of an iguanodontid dinosaur that was also believed to have gotten mired in quicksand. So far bones from perhaps six individual Utahraptors have been found and they think were attracted to the quicksand mire by the easy prey and we're trapped. This block could provide evidence for pack hunting behavior in Utahraptors Funding is required to keep the project moving The setting, Utahs badlands the Cedar Mountain Formation initial discovery Sickle Claw visible More initial discoveries Jaw fragment Dentary Utahraptor Project Link to learn much more about what is going on. http://utahraptors.utahpaleo.org/#gallery
  13. New fossil croc from Turkey

    A new paper is available online that will surprise all of you: Stéphane Jouve; Volkan Sarıgül; J.-Sébastien Steyer; Sevket Sen, 2017. The first crocodylomorph from the Mesozoic of Turkey (Barremian of Zonguldak) and the dispersal of the eusuchians during the Cretaceous. Journal of Systematic Palaeontology. Online edition. doi:10.1080/14772019.2017.139346. I remember that Turkey has yielded the remains of the extinct ape Ankarapithecus but also extinct rodents, but the discovery of Turcosuchus may surprise some paleontologists due to its location in northern Anatolia and the rugged, mountainous terrain of Anatolia. However, it is important to note that the vast majority of Mesozoic deposits in the Mideast are marine in origin, and that Embasaurus and Karatausuchus are the only archosaur species described from Oxfordian-Barremian deposits in Central Asia so far. However, the occurrence of Hylaeochampsidae in Europe indicates that some primitive eusuchians made it to Europe from Central Asia via Anatolia, considering that tetrapod fossils have been found in Early Cretaceous bauxite deposits in Romania.
  14. Something different, a Sauropod skin impression from their footprint from the early Cretaceous of Korea (link: https://www.nature.com/articles/s41598-017-16576-y.pdf) nature.com/articles/s4159…
  15. Gastroclupea branisai Signeux, 1964

    From the album Vertebrates

    Gastroclupea branisai Signeux, 1964 Early Cretaceous El Molino Formation Pajchapata Cochabamba Bolivia Lit.: Giuseppe Marramà & Giorgio Carnevale (2017) The relationships of Gasteroclupea branisai Signeux, 1964, a freshwater double-armored herring (Clupeomorpha, Ellimmichthyiformes) from the Late Cretaceous-Paleocene of South America, Historical Biology, 29:7, 904-917, DOI: 10.1080/08912963.2016.1262855 Reconstruction of Gastroclupea branisai by Giuseppe Marramà & Giorgio Carnevale
  16. Dastilbe crandalli

    From the album Fossildude's Purchased/Gift Fossils

    An inexpensive auction site find! Dastilbe crandalli Early Cretaceous Crato Formation, Araripe Basin, Ceara, Brazil.

    © 2017 Tim Jones

  17. I have a coprolite from Sihedang Town, Chaoyang City, Liaoning Province, China. The preparation was bad, and the coprolite itself came free of the matrix during shipping. Since it was a good sacrificial piece, I decided to dig around. I found this tooth, but unfortunately, I broke it before I was able to extract it or get a microscopic image. Any guesses? The coprolite contains no scales, but there are fish bones and vertebrae partially exposed. Thanks in advance for any help you can offer.
  18. Coprolite?

    Hello everyone, Today I was going through all my older fossils, and I found this in my box of ammonites. Obviously this isn't one, and I must have put it in that box by mistake. It looks a lot like a coprolite to me, but I have no clue from what animal. Unfortunately I don't remember anymore where I found it. There are two possibilities: either from Lyme Regis (UK), or from one of the Cretaceous beaches on the Isle of Wight. Any clue to what it could be, and maybe what location? Best regards, Max
  19. Iguanodonts in Alberta

    Interesting find leads researches to speculate that Iguanodonts were in Canada? Footprints found in the Gladstone Formation of Southwest Alberta appear to be the first piece of evidence that the range of Iguanodonts was global. The footprints are similar to Iguanodon bernissartensis which is found in the UK. https://www.paleowire.com/just-out-the-first-evidence-of-iguanodontids-dinosauria-ornithischia-in-alberta-canada-a-fossil-footprint-from-the-early-cretaceous-cretaceous-research/ The first evidence of iguanodontids (Dinosauria: Ornithischia) in Alberta, Canada – A fossil footprint from the Early Cretaceous Donald M. Henderson $$$ http://www.sciencedirect.com/science/article/pii/S0195667117300952
  20. A short video on a basal ceratopsian from the Cloverly Formation: Aquilops americanus
  21. Scientists have just reported a new genus and species of sail-backed iguanodont from the Early Cretaceous of Spain: http://www.reuters.com/article/us-science-dinosaur-idUSKBN0TZ2UP20151216 The discovery of Morelladon isn't the first time a sail-backed iguanodont has been reported from Spain. A slightly older iguanodont from Spain had been reported in the 1990s, but it wasn't until 2011 that it was fully described in detail. Due to the discovery of Delapparentia (which is distinct from Iguanodon and Mantellisaurus specimens from Spain), it's now clear that more than two iguanodont species lived in Spain during the Barremian. Morelladon further illuminates the evolution of iguanodonts in Europe during the Cretaceous by showing that a handful of European iguanodonts had sails like Ouranosaurus. It's kind of interesting how some iguanodonts have names ending with -don, as in Owenodon, Mantellodon, and Dakotadon, and others don't, like Mantellisaurus, Hypselospinus, and Barilium.
  22. Fossils Or What?

    I have taken a photograph of some peculiar traces or artifacts on an early Cretaceous carbonate beach. I can't figure out what they represent. You can see the photograph on my blog. http://mesozoicmosaic.blogspot.com/ Any suggestions, please?
  23. A news article concerning a new ornithomimosaur site from the Early Cretaceous of France..... http://www.sudouest.fr/2013/08/21/des-dinos-et-des-pinceaux-1146355-811.php The French ornithomimosaur represents the second confirmed record of an Early Cretaceous ostrich-mimic from Europe and may provide another insight into the biogeography of the earliest ornithomimosaurs, as Nqwebasaurus has been recently considered an ornithomimosaur and Pelecanimimus is by far the only European ornithomimosaur named so far. I wouldn't be surprised if we find an ostrich mimic in the Wealden of England or the Cedar Mountain Formation of Utah. Who knows?
  24. Ichthyosaur Fossil Site In Iraq

    The discovery of the Early Cretaceous ichthyosaur Malawania surprised me because fossil discoveries in Iraq have long been hampered by the legacy of Saddam Hussein's tyranny and bloodshed in Iraq that was perpetrated by Al-Qaeda against the Shiites after the 2003 US invasion. Why's it taken so long for the palaeontological community to find an Early Cretaceous marine reptile in the Middle East even though it's known that Iraq was submerged beneath the Tethys Ocean in the Mesozoic? Would it be cost-effective for the Iraqi oil industry to search for marine reptiles in the Cretaceous strata in Iraq?
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