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  1. Othniel C. Marsh

    Oxford Clay Teeth

    Below are two teeth from the Callovian of the Oxford Clay. The left was identified as Hypsocormus tenuirostris, and the right one Teleosaurus sp. I thought it would be worth verifying both IDs, given how difficult some Jurassic marine reptile teeth are to identify. It is my understanding that @pachy-pleuro-whatnot-odon has great expertise with regards to Jurassic teeth. What do you make of them? Thanks in advance for any guidance Othniel
  2. oilshale

    Prolyda elegantula Wang et al., 2016

    From the album: Invertebrates

    Prolyda elegantula Wang et al., 2016 Middle Jurassic Callovian to Oxfordian J iulongshan Formation Daohugou Inner Mongolia PRC
  3. RuMert

    Ichthyosaur vert

    From the album: Late Jurassic ichthyosaurs from the Volga

    Ryazan Oblast, Mikhaylov, Upper Callovian, phosphorite
  4. Daniel1990

    Brachiopod or clam?

    Hi I found such a specimen today. Is it a brachiopod or a clam? Age is Jurassic Callovian. Thank you in advance for your help and best regards. Found: Częstochowa, Grabówka,Poland
  5. Ossicle

    Oxford Clay - Crustacean?

    Oxford Clay, Callovian, Peterborough Member I'm wondering if this pitted fragment is crustacean. It seems wrong for a scute, although there is some similarity to fish scales I have in overall shape. Or something entirely different. Scale is mm. The most similar thing I've found are ostracods.
  6. Kevin Speight

    Ammonite ID Confirmation

    Hi everyone. I recently liberated this rather nice ammonite from a block found in a ploughed field near Chippenham, Wiltshire, UK. I believe it to be a Quenstedtoceras from the Kellaways beds (Callovian age). I'd really appreciate it if a more learned member could confirm this. My track record for self ID's thus far has been atrocious!
  7. Ludwigia

    Thalattosuchus (Young et al. 2020)

    From the album: Vertebrates (other than fish)

    11mm. Tooth. Obtained on a trade with Strepsodus. Lower Oxford Clay Callovian Middle Jurassic From Must Farm, Whittlesey, Peterborough, Cambridge, UK
  8. Hi everyone! Last week we went on a weekend trip with our fossil club the BVP to go on a fossil hunt to the jurassic clay cliffs "Falaises de Vaches Noires" between Houlgate & Villers-Sur-Mer in Normandy, France. https://www.paleontica.org/locations/fossil/68 The famous cliffs of Vaches Noires date back to the Jurassic period, and span both the Callovian & Oxfordian stages (166 - 157 mya) and the Cretaceous period spanning the Cenomanian (100 - 94 mya). Back in the jurassic this area was a rich marine environment and fossils that can be found here are many species of bivalves (like Gryphaea, Lopha & Myophorella), ammonites, gastropods, belemnites, brachiopods, crinoïds, sponges and other invertebrates. The cliffs are also known for marine reptile material and even dinosaur material, though these finds are rather rare but you'll see some nice pieces in the museum pics later. We arrived Thursday afternoon (november 3th) and stayed to Sunday (november 6th). We were very happy to join this trip organized by our club since it is probably the last year that fossil searching is allowed in this amazing location. We were with around 27 people I believe and met each morning at the entrance of the beach at Houlgate. We searched the cliffs for 2 days and went to the local museum "paleospace" on sunday. The weather was amazing for the 2 days of searching, it was even sunny the first day! The first few hours we mainly searched among the rocks on the beach which were littered with large Gryphaea fossils and other bivalves like Lopha gregarea. After our lunch break we moved on to search more near the clay to find smaller fossils. On our second day we again searched the clay, went through some interesting places in the sand which were littered with oysters, gastropods and had some ammonite and crinoïd fossils and we ended the day at the cenomanian rocks in search for some fossil urchins. The Cenomanian rocks on the beach A piece a chalcedony A partial ammonite Me very happy with my first complete ammonite, which I found next to me while having lunch One of the mystery fossils which nobody could really determine (we brought it home along another we found) The tubes seem to be pyritised. I believe it to be some kind of Echinoderm and someone suggested it might be a Crinoïd with a parasite on it. But eventually our top finding (and the best of the entire trip) was spotted by my girlfriend Elise and is this gorgeous fish (probably Lepidotes sp.)
  9. Have a good air scribe?little time ?, I have 5 kg of complete ammonites to offer for prep this winter,Callovian of Montreuil Bellay Maine-et-Loire France the cost of the 5kg Prepaid box for the world is 45 euros(except Russia and north Correa ),13euros 50 for France,i can send two boxes,i would like in return all kind of good fossils i still not already have ,Plants Ammonites(prep of course )brachiopds
  10. Jeremie

    Unidentified tooth

    Hello, I found this fossil in the center of France, in the loire valley. There you can find ammonites, echinoderms, seashells.. all marine animals. Unfortunately I'm not able to identify this one, it looks like a tooth to me but I'm not sure. Dimensions: 2cm
  11. pachy-pleuro-whatnot-odon

    Vaches Noires: plesiosaur tooth or fish tooth after all?

    Hi all, Last summer, while out hunting at the Vaches Noires on the Normandy coast of France, we found the below tooth in the Marnes de Dives (upper Callovian) . I extracted it from its matrix in order to be able to tell with confidence whether carinae are present or not and thus whether the tooth could be metriorhynchid - which I thought, at the time, to be the only other major contender. Carinae are not present. As such, I then arrived at the conclusion that the tooth is plesiosaurian, and in absence of striations - anastomosing or other - that it probably belonged to Cryptoclidus sp.. This is the state in which it has remained since then. From left to right: Muraenosaurus leedsi, Cryptoclidus oxoniensis and Tricleidus seeleyi (Noè, Taylor and Gómez-Pérez, 2017) However, I keep occasionally bumping into Hypsocormus sp., a pachycormiform fish with a temporal range from the Callovian stage of the Middle Jurassic all the way through the Late Jurassic up to the Cretaceous - most recently today with the jaw below. And I must certainly say that I see some semblances... Specimen from the Oxford Clay at Peterborough An unidentified pachycormiform fish tooth from the Oxfordian levels of Vaches Noires (source) that I, here, suggest may, in fact, represent Hypsocormus sp.. Two specimens of Hypsocormus sp. from further up north on the French coast, in the Boulonnais, dating to the Kimmeridgian/Tithonian (source). Given sizes are 6.45mm and 13.1mm respectively. Two Hypsocormus sp. specimens from the Lower Oxford Clay, UK (specific locality unknown; source). Hypsocormus sp. from the Callovian of the Tournus-region of Saône et Loire in France (source). One thing that stands out from all the specimens that I've been able to identify online is that most have an notable acrodin cap, which clearly marks them as fish teeth. It's based on this that I've identified the below tooth from a vendor site as Hypsocormus sp. (or a pachycormiform, at least) tooth, although the seller had listed it as plesiosaur. Thus it seems that confusion surrounding this topic is not uncommon. Unfortunately, however, my specimen is lacking its very apex (though, could this fact in itself be an indication of there once having been an acrodin tip that more easily got damaged or eroded away?)... Pachycormiform tooth mislabelled as plesiosaur, from Fletton, Peterborough Size cannot be used as a distinguishing feature either, as, while my tooth's total length is 1'' or 2.54cm exactly, the enamelled part is only about 1.5cm, which seems to be close to the upper limit of what Hypsocormus sp. teeth were able to grow to, from what I've been able to find out. Ornamentation/striations then? This feature can't be used either, since not all positively identified pachycormiform teeth in my sample have these. How about an in-filled hollow root? Both have these. Though it seems that the pachycormiform teeth actually often lack the enamel-free part you'd identify as the root, with them apparently having broken off close to the enamelled crown, as is the case with most fish teeth. In fact, this was my main argument to reject my specimen being fish before. However, looking at the jaw posted above, you'll notice that the largest tooth lying next to the jaw does have an enamel-free, irregularly broken-off base as well. I thus find myself wondering what the exact features are that define these pachycormiform teeth, and how to distinguish them from reptile teeth. Anybody have any ideas on this or on the argued identification of my tooth? I'll start by tagging @PointyKnight, @RuMert, @caterpillar, @Carl and @taj, but please don't hesitate to join the discussion!
  12. Marco90

    Myophorella clavellata

    From the album: My collection in progress

    Myophorella clavellata Parkinson, 1811 Location: Villers-sur-Mer, Normandy, France Age: 166-163 Mya (Callovian, Middle Jurassic) Measurements: 2,8x1,7 cm Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Bivalvia Subclass: Palaeoheterodonta Order: Trigoniida Family: Trigoniidae
  13. pachy-pleuro-whatnot-odon

    New longirostrine pliosaur described from the Oxford Clay

    Hi all, Just came across the exciting news that a new pliosaur genus and species has been described from the Callovian stage of the Oxford Clay near Yarnton in Oxfordshire. Dubbed Eardasaurus powelli (Powel's Yarnton lizard), it's a longirostrine thalassophonean pliosaur that is slightly more derived than Peloneustes philarchus (with which it shares numerous anatomical features) and forms a sister taxon to "Pliosaurus", Simolestes, Liopleurodon, Pliosaurus and brachaucheninae. A feature of particular interest in the dentition of this new species is the presence of connecting carina-like apicobasal ridges on some of its teeth. The article describing Eardasaurus powelli can be found here.
  14. Jurassic, Callovian, Oxford Clay, Peterborough Member This has enamel, and is the colour I associate with fish remains. Enamel made me think dentition or scale of some kind, but I'm puzzled by the shape. It has a couple of prominent tubercles, which made me think teeth or scale. Any pointers would be greatly appreciated.
  15. Jurassic, Callovian, Oxford Clay, Peterborough Member. I found three this weekend I'm unsure about and would appreciate your thoughts. The first I think might be a decapod carapace.
  16. Ossicle

    Oxford Clay oddity

    Jurassic, Callovian, Oxford Clay, Peterborough Member, Yaxley, Cambridgeshire. The closest thing I can think of to what this looks like is a belemnite, but the overall shape is wrong, and the cross-section is very wrong for belemnites I've found at this site and elsewhere. I haven't completely ruled that out though, and opinions would be appreciated.
  17. Jurassic, Callovian, Oxford Clay, Peterborough Member, Yaxley, Cambridgeshire I've found a few of these recently, and been trying to puzzle them out. I had thought they might be crab claws. Today I found my largest and best preserved one so far. I can clearly see plates, but I haven't found plates on images of Jurassic crustaceans, including in Martill. What it more looks like is the diagram of Ophiuroids in the book, which is what @JamieLynn, suggested might be the case, due to the plates. I have found brittle star at the site before, but the preservation was very different, not at all pyratised. So I'm wondering if this is Ophiroid, crustacean or something else entirely. If crustacean I was wondering about Thalassinidea, because I find so many burrows. I've attached images of the fossil and images from this article for comparison: https://www.cambridge.org/core/journals/journal-of-paleontology/article/brittle-stars-from-the-british-oxford-clay-unexpected-ophiuroid-diversity-on-jurassic-sublittoral-mud-bottoms/8B34E184DFCF1CEEE275194CE2498B17 Any help would be greatly appreciated. The ends I find particularly fascinating.
  18. As it's too stormy to collect fossils... Jurassic, Callovian, Oxford Clay, Peterborough Member, Whittlesey, Cambridgeshire. This was something very odd I found from a concretion in the Oxford Clay. They are great for three dimensional fossils such as ammonites. It looks like wood, in which case it's my first bit that isn't carbonised, or possibly bone. It could also simply be mineral. Another possibility is fish. I really wish there was more of it, that might have cleared it up, and would appreciate your thoughts.
  19. Oxford clay, Peterborough Member, Jurassic, Callovian, Whittlesey in Cambridgeshire I collected this a few years ago, and I'm unclear whether it's a large cephalopod hook, or part of a fish, or something else entirely. Any assistance would be greatly appreciated.
  20. Ossicle

    Bone or not bone?

    Jurassic, Callovian, Oxford clay, Peterborough Member, near Yaxley in Cambridgeshire. These are fragments I've picked up over time, wondering if they have bone texture or not. The bits I have that are unequivocally bone have better indicators. Opinions would be very welcome. The first I keep in my miscellaneous pile. These are all the same piece of rock. With something so small, even if it is bone, is it something that is potentially identifiable?
  21. Ossicle

    Oxford Clay - Hybodont?

    Oxford clay, Peterborough Member, Jurassic, Callovian, near Yaxley in Cambridgeshire. I spent the morning getting muddy in wet clay, and found this. I think it might be part of a hybodont spine, or other ornate fish spine. I've collected a fragment of hybodont spine from this site before. The surface does seem to be enamel, and the shape is slightly curved. Any assistance greatly appreciated.
  22. I got the chance to go to the Oxford Clay twice over the last few days. I'm always looking for echinoderms at this site, and I prefer this one in winter when the vegetation has died back and I can spot lots of small, delicate detail. These are some if my favourite finds from the last few days.
  23. I'm trying to determine if these are echinoid. I found these two on an Oxford Clay trip yesterday, Jurassic, Callovian, Peterborough Member, near Yaxley in Cambridgeshire. The first is, I think, a partial echinoid spine. My only doubts are because it's quite different from the others I've found at the site, it's a very different pattern. I would appreciate another opinion. The second has completely confused me. It looks black, so I thought it was pyrite, but when I photographed it, it's clearly a completely different material. It's a very odd shape, like a tiny snowman, and the only thing I thought it might be is a mamelon from an echinoid tubercle. I don't have anything else like this, and the different material puzzles me. I would really appreciate opinions on this.
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