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Found 18 results

  1. 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
  2. Notidanodon

    Kings dyke tooth

    Hi guys, I’m thinking this is croc due to the carina, any thoughts on species? Thanks
  3. Notidanodon

    Oxford Clay croc tooth?

    Hi guys, I have this tooth from the Oxford clay and i was wondering if anyone could put a solid ID on it thanks
  4. Notidanodon

    Pleistocene vertebra

    Hi guys I have this pleistocene vertebra from Peterborough, uk and I was wondering if anyone could help to identify it, I was thinking bovid of some kind?
  5. Hi all, I recently decided to buy the below plesiosaur vertebra after having seen it for a long, long time. It dates to the Callovian of the Oxford Clay and was found at Peterborough. I suspect it may be attributed to Muraenosaurus leedsi, as it comes from a cryptoclidid plesiosaur, but is both larger and more elongate that the typical Oxford Clay Cryptoclidus vertebrae I'm familiar with. Supposedly coming from an old collection, it has a blackened exterior that doesn't cover the entire piece, with the more common buff colour visible underneath. As such, I expected the dark colouring to be simple dirt or may be some kind of consolidate that could be removed using acetone to leave a nice and clean looking vertebra in its place. However, since having tried acetone cleaning, the dark colour doesn't come off - suggesting that it isn't surface dirt and any consolidate, if present, is not soluble in acetone. I've also noticed that the black colour doesn't spread equally across the vertebra, which is most noticeable towards the top on the front face (first image) where one half of the vertebra is buff, the other black, with a hard separation in between. As this mottled pattern can be seen in other places on the vertebra as well, I thought that, may be, the vertebra might have been in a fire and have become covered in soot. I find additional support in the latter hypothesis in very brittle pieces of bone in one or two spots, with a charcoal-like grainy texture. Lastly, then, I've spotted a tiny edge of yellow staining/infill in an area where the vascular structure of the bone is exposed, with some white infill in an area adjacent - which I've now started worrying might be pyrite. My questions to you are: Origin of the blackening: Does the black clouding of the vertebra look like natural preservation? Related to the above: could the black clouding be due to pyrite decay? In contrast: could exposure to fire cause the clouding pattern seen on the vertebra? What consolidate might have been used to result in such colour patterning? Cleaning: Is there a way to remove soot from a fossil? Has anyone tried? Other than removal by acetone, what other ways might I try to remove an old, darkened consolidate? In case of decayed pyrite, I don't think there's anyway to clean the surface, other than, may be, through careful sandblasting, is there?
  6. pachy-pleuro-whatnot-odon

    Unidentified Jurassic marine reptile bone

    Hi all, I've had the below piece in my collection for a number of years now, having acquired it thinking it was a juvenile plesiosaur propodial. It comes from the Oxford Clay of Peterborough and is of Callovian Jurassic age. However, when recently doing some research towards answering another question on TFF, I realised that - even though there's some plastic deformation going on - it doesn't quite look like the juvenile plesiosaur propodial I have from the rhaetic at Aust, nor does it look like a plesiosaur propodial in a more general sense (see both post and images below). There are some oddities that have started to make me wonder, in not a plesiosaur propodial, what else it may be in that case. The bone is quite dense, so is definitely marine reptile. And, since I'm quite sure it's not ichthyosaurian, this, I believe, leaves only pl(es)iosaur and teleosaur. Morphologically, the bone consists of a shaft that widens towards one end, with the other end having broken off. The widened end, top-side, forms a bit of an overhang across what appears to be an intact articulation surface, with a notch cutting into it from the right. At the broken end, also on the right, there appears to be a slight twist in the bone. This is, moreover, the side that's rounded along the length of the bone, whereas the other side appears carinated. Although there's some crushing on the underside of the bone, that surface appears markedly more flat than the obverse. It is primarily the facts that one of the edges is (more) angular and that the bone thickens towards the widening end - rather than thins out, as in a typical plesiosaur propodial - that make me feel this is not a plesiosaur (sensu lato) propodial. Unfortunately, I don't have enough qualitative reference material on teleosaurs myself (some images below) to evaluate whether they could be a candidate for the bone - such as long or girdle bones - and didn't find anything matching amongst the figures in Johnson, Young, Steel and Lepage (2015) or Young, Sachs & Abel (2018) either. So I'm left thinking may be it could be a plesiosaur ilium, as in the other post referenced above. There are definitely some features that seem to argue in its favour, such as the flat back, slight twist and widening distal end. But lacking the proximal end of the bone makes it harder to judge, and the thickening of the bone towards the widened part seems to conflict with the idea of the bone being an ilium. Still, there are very few flat narrow bones in a plesiosaur outside of its extremities... Machimosaurus sp. at the Museum voor Natuurwetenschappen in Brussels (source: Wikipedia) Thoracic region of Machimosaurus sp. at Paléospace l'Odyssée at Villers-sur-Mer Metriorhynchus superciliosus at the Paläontologische Summlung MUT Tübingen Thoracic region of Steneosaurus sp. at the Fossilienmuseum Dotternhausen Steneosaurus spp. specimens at Urweltmuseum Hauff in Holzmaden Steneosaurus sp. leg bones at the Paläontologische Sammlung MUT Tübingen
  7. PointyKnight

    Marine Predator Coprolite

    From the album: Oxford Clay Fauna

    Coprolite Jurassic, Callovian Oxford Clay, Peterborough Member Hampton Lakes, Peterborough, Cambridgeshire, UK A coprolite from an indeterminate marine predator, showing inclusions of nacre, partially digested bone, and fish scales of Pholidophorus? sp. (an indeterminate pholidophorid) and Coccolepis sp. (an enigmantic coccolepid).
  8. In short, I'm trying to figure out exactly what was on the menu: fish or cephalopods. While sorting through some Oxford Clay fish coprolites, I came across this specimen. It was part of a batch purchased years ago. I must have just assumed the inclusions were fish vertebrae, but now I'm not too sure. I know some vertebrae from some fish fry can be hollow, but the texture/material of these inclusions look very different from anything I've seen (including vertebrae in Oxford Clay coprolites). Because of the color and layers, I'm thinking these may be chitinous. That said, I haven't seen enough fossilized chitinous material to be sure. The only thing I've seen are cephalopod hooks in coprolite (tiny and thin with no layers) and Arthropleura tergites (note layered because they weren't exposed to digestion?). I know back in the early 1800's, William Buckland thought some of the rings found in Blue Lias coprolites could be rings from the suckers of cephalopods, but acknowledged fish vertebrae should not be ruled out (On the Discovery of Coprolites, or Fossil Faeces, in the Lias at Lyme Regis, and in other Formations - Page 226). I have a number of specimens with that type of ring, but they are smaller and fossilization/mineralization isn't the same. So here are my questions: 1. Does anyone out there have any examples of beefy chitinous inclusions in coprolite? 2. Is there a quick test for chitin? 3. Has anyone seen vertebrae that look like these? 4. Has anyone seen fossilized rings from cephalopod suckers? Some extant squid have these, but their rings have little teeth/serrations on them. 5. Any other ideas what these could be? As always, thanks for looking! @MarcoSr, @DE&i, @Carl
  9. pachy-pleuro-whatnot-odon

    Ichthyosaur paddle digit (Wimereux): hit or miss

    Hi all, Found this stone at Pointe aux Oies in Wimereux two days ago, amongst the pebbles collected next to a shelve down towards sea from the spot where I had found an ichthyosaur vertebra (on matrix) two days before this find. I picked it up because 1) the stone is unusually flat; 2) has exactly the right shape and thickness to it for an ophthalmosaurid ichthyosaur paddle bone (see picture below); 3) has certain ornamentation top and bottom; 4) seems to be of a different type of stone than I've generally come across in the area; and 5) has some weight to it. It vaguely reminds me of paddle bones found in the Oxford Clay at Peterborough. Yet, what makes me doubt, though, is that there is no clear radial ornamentation on either top or bottom of the piece, as would by typical for an ichthyosaur paddle bone. A friend of mine, more familiar with fossils from the region, suggested it could be a crocodile scute, as the ones found further up the coast, but this, to me, seems unlikely, as 1) the ornamentation on my find differs significantly from what's typical for crocodilians; 2) the underside is not flat as it would be for crocodile; and 3) the piece seem to thick for a scute. Size is about 4.4 x 3.4 x 1.4 cm (1.7 x 1.3 x 0.6 ") Brachypterygius extremus paddle from Ichthyosaurs: a day in the life... My piece reminds me of the radius. Now my question is: Is this just a rock - i.e. am I seeing things because I really want to - or is it an actual fossil? Is this an ichthyosaur paddle bone/phalange or something else?
  10. LegitimateScientist1

    Oxford Clay Vertebra

    Hello, I bought this vertebra today at the Oxford Fossil and Mineral Show. The seller did not know what it belonged to, only that it was found in the Oxford Clay in Orton, Peterborough. Any help on what this came from would be greatly appreciated, thank you.
  11. Ludwigia

    Steneosaurus sp. (St.Hilaire 1825)

    From the album: Vertebrates (other than fish)

    2.5cm. Tooth. Obtained on a trade with Strepsodus. Lower Oxford Clay Callovian Middle Jurassic Found at Maxey Pit, Peterborough, Cambridgeshire, UK
  12. Hi everyone! Took the two hour drive to Kings dyke on Sunday hoping that the new material that had been dumped would produce. For those who are unsure Kings dyke is a nature reserve situated next to a working brick quarry. Every so often they dump a load of the spoil from the quarry in a area that the public are allowed to search in. In the photo below you can see the working quarry in the background and the fenced in fossil area in the foreground. What i would give to be allowed into the main quarry..... This material is absolutely full of Gryphaea 2D ammonites and sometimes marine reptile bones and fish fossils. Unfortunately on this day, the bones eluded me. I ended up digging in random spots until i found large blocks that were big enough to split and this resulted in some lovely large belemnites with most coming out in a multiple pieces apart from a couple which came out complete. Certainly the largest ones i have ever found. I then drove 20 minutes down to a road to a disused quarry located on the edge of Yaxley. This quarry has nearly been completely flooded however there is a small area where the Oxford Clay is exposed on the surface at the edge of the flooded area. The fossils erode out of the bank on the waters edge so you can either walk along the bank, or, as i and others do, put on waders and sieve the material that is at the bottom of this bank in the water. Before long i had found plenty of smaller ammonites of different species, a single vertebra which looks like it has come from a fish, and what i think is my first ever Ichthyosaur tooth. Albeit just the tip. If anyone can confirm for me that would be brilliant. Length is 9mm. After a few hours my back was in agony and with big black rain clouds threatening i headed off for what should have been a two hour drive home, however due to an accident and a detour i got lost on it took nearly 5 hours... Hope you have enjoyed reading this and have a nice day!
  13. Hey everyone - hope you're all doing all right For the past few days, I was for a short holiday in South England - and while I was in Oxford, I had the chance to see at the Natural History Museum a new, amazing exhibit called Out of the Deep. The display consisted of two remarkable, nearly complete skeletons of marine reptiles - both of them from the ~165-million-year-old Oxford Clay Formation of southern England. One of the skeletons was of a pliosaur (otherwise known as a short-necked plesiosaur) called Peloneustes, which had been discovered in 1994 in Yarnton (Oxfordshire). The other skeleton (nicknamed "Eve"), discovered in Peterborough (Cambridgeshire) in 2014, was of a longer-necked plesiosaur. According to Roger Benson, the skeleton might represent a new species. Both skeletons are really beautiful - and I'd recommend all of you to check them out The Out of the Deep display, with its two plesiosaur skeletons in all their glory Photo credit Oxford University Museum of Natural History Well-preserved mandible from the Peloneustes skeleton The nearly complete skull of "Eve" the long-necked plesiosaur... The Out of the Deep exhibit is truly a must-see!! -Christian
  14. Hello, I am looking for help identifying a specimen collected during field work for my dissertation. The piece was collected from the Lower Oxford Clay (jason zone) in Peterborough, Cambs. I suspect that it is Ischyodus egertoni, but am not positive whatsoever! Any thoughts would be appreciated Cheers, Jacob.
  15. Still_human

    Plesiosaur and pliosaur teeth

    From the album: Marine reptiles and mammals

    Pliosaur teeth--liopleurodon ferox(?) & unidentified genera plesiosaur teeth--cryptoclidus sp & cryptoclidus sp (?) lower oxford clay callovian stage middle jurassic 160 mya peterborough, cambridge U.K. Hampton lakes & Bradley Fen.whittlesey
  16. This coprolite is from a marine creature that swam in the Jurassic seas that once covered this parts of England. The dark inclusions that can be seen on the surface are Onychites (cephalopod hooks). In April 2016, the University of Minnesota X-ray Computed Tomography Lab scanned the specimen using a X5000 high resolution microCT system with a twin head 225 kV x-ray source and a Dexela area detector (3073 x 3889 pixels). Many of the images shown here are of individual 3D elements/features within the coprolite that were separated/isolated using Blob3D. The taxonomic classification given is for the inclusions, not the coprolite. Aside from the hooks, it is hard to definitively identify the inclusions without damage to the coprolite. The following is a list of inclusions: 241 hooks of various sizes that are at least 75% intact. 200+ plate-like fragments of various sizes (likely similar to the surface nacre). 19 ellipsoidal structures, possibly forams or parasite eggs. 2 unidentified long, straight conical structures joined at wide end (A) 1 long rod-like structure with a bulbous end (B) 1 unidentified mass that looks like it was the attachment point for 5 rod-like structures (C) 1 1ong cylindrical (rod) structure that tapers in the center. The center density is much lower than the outer shell (D) 1 irregular structure that looks I originally thought might be an ink sack or buccal mass, but the size is wrong. Experta think it is more likely foraminifera (E) 1 irregular structure, possibly a statolith (F) Acknowledgements: Thank you to Neale Monks and Christian Klug for providing input.
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