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  1. Liopleurodon ferox tooth Oxford Clay, Orton Brick Pit, Peterborough, UK Identified by Dr Adam S. Smith (Author of The Plesiosaur Directory) as belonging to Liopleurodon ferox due to the distribution, length, spacing of the ridges which is typical for the species
  2. please help me identify this tooth, found in java island, indonesia the height almost 10 centimeter
  3. Hello All! Was wondering if this is a possible Liopleurodon tooth? It is from the Orton Brick Pit, a site known for marine fossils dating back 150 million years to the Jurassic period, now a private site closed to the public due to conservation. Tooth measures approximately 2 inches, pictures attached below
  4. FF7_Yuffie

    Texas Pliosaur tooth?

    Hello, Thoughts on this? Half an inch long, sold as a Pliosaur tooth from Texas. Seller thinks Eagle Ford, but isn't 100%. I like the look of it, but wanna rule out croc or ichthyosaur. cheers
  5. 7 pm tonight PBS airs documentary on Pliosaur by David Attenborough .
  6. In past, I was afraid of the tooth damage, so I put adhesive on the tooth. But adhesive parts turned white, because it didn’t dry properly, so I requested an acquaintance to restore it. Fortunately, removing adhesive was successful. Due to, the striation looks clearer. Here’s check it. Lastly, more closer striations.
  7. Quick! Save the monster! Hopefully they can raise the funds. https://www.bbc.com/news/uk-england-dorset-68349380.amp
  8. I recently acquired this piece. It's a little over an inch long, from the Asfla region of Morocco. It was labeled pliosaur but looking at other pictures online, it appears to favor a Polycotylidae plesiosaur tooth. Thoughts?
  9. I recently found two pliosaur teeth were on sale on online auction site. One was listed as “Simolestes sp.”, and another was identified as “Liopleurodon sp.”. What’s your thoughts? Are they real Jurassic pliosaur teeth, or they belong to something else?
  10. Mikrogeophagus

    Brachaucheninae Pliosaur, Kamp Ranch

    From the album: Eagle Ford Group

    Brachaucheninae Pliosaur, North TX Turonian, Cretaceous Dec, 2023 This was a very fragile tooth to prep because it is only a thin fragment on a very weak matrix. After some delicate needlework and b72, I think it came out pretty good.
  11. Hello, thoughts on this. Supposedly a Pliosaur tooth, from Atlas Mountains Morocco. But is it Pliosaur or Plesiosaur? cheers
  12. Hi everyone, I recently found a marine reptile tooth fossil that was discovered in Stary Oskol, Russia. The tooth is currently labeled as “Pliosaur” by the seller. Considering the prevalent geological age of the Stary Oskol region as Cretaceous, it indicates that the tooth could be from a Cretaceous plesiosaur or pliosaur. However, the absence of enamel striation raises doubts about its identity, as most Cretaceous pliosaur teeth typically exhibit fine striations across the circumference. Any thoughts on this?
  13. While looking at fossils collected by collectors, i discovered a fossil of a pliosaurus tooth from the Tatarstan region. For the first time I saw the teeth of a Tatarstan pliosaurus. If anyone has one, could you show it to me?
  14. RuMert

    Pliosaur humerus, proximal part

    From the album: Late Jurassic plesiosaurs from the Volga

    Tatarstan, Tetyushi, Kimmeridgian, worn and pyritized
  15. Hello! Recently, I've got an pliosaur tooth and so excited to get this one because of the rarity. Seller said it is Liopleurodon ferox. But unfortunately seller did not say about fossil's exact information(Formation). He just said it came from La ferme d Argence, Normandie. Is this tooth possible to Liopleurodon ferox? Add some images. Size 3.35 inch. It's definitely looks like genuine pliosaur tooth, but I'm not sure what species it is.
  16. Pliosaur

    Liopleurodon tooth?

    Liopleurodon tooth? Early Tithonian, Volga beds, Moscow basin, Russia.
  17. I've got three pliosaur teeth, and I'd love to see what pliosaur teeth members on the forum have! Mine are as follows: Brachaucheninae from Russia, early cretaceous Possible Jurassic pliosaur tooth due to its slender shape, from Russia Brachaucheninae tooth from Morocco
  18. JorisVV

    Pliosaur tooth

    This is a very nicely preserved Pliosaur tooth from Goulmima apparently. It has the details of a Pliosaur tooth. Only question is the color. Lots of them are brown to red colors. This one is grey/black. Could this be from a different location?
  19. Even after having a night to sleep on the fact, I'm still in shock. I was tempted to not even go on this trip since part of me wanted my plesiosaur tooth from last week's Woodbine adventure to be my final impression on North TX. The other part of me wanted one last crack at the Kamp Ranch and a new potential site. It's fine to return to already known locations, but I was thirsting for one more journey into unknown territory where the risk of failure is greater, but the taste of victory is sweeter. After swimming/wading a ways, I found the first small outcrop of Kamp Ranch. I've had some previous experience with this layer in the past, and the knowledge I picked up from then proved useful. While most of the outcrop was relatively devoid of vertebrate material, there was a thin pasty layer cemented to the underside of the thickest limestone that proved to be rich in teeth. I pried out the odd Ptychodus tooth here and there, but pretty soon I was out of real estate. The thick limestone slab looked precarious and the rest of the pasty matrix I was after was nestled deep in the crumbly wall. Noticing the slick shale beneath my feet, I decided jumping away from an avalanche was out of the question and it was time to move on. Ptychodus from the outcrop. All P. anonymous except the top right which may be a P. marginalis(?) lateral. On the walk over to the next outcrop, I made sure to scan the loose pieces of Kamp Ranch matrix scattered about. Most of them were only comprised of oyster bits and Collignoniceras woollgari impressions, but once in awhile there would be some shark. I went for a rock with a shiny black Ptychodus anonymous that had caught my eye. As I dug it out to have a closer look, I saw there was a tiny tan mosasaur situated next to it! Unfortunately it's cracked and in super hard material. If I try to bust it out, it will probably explode! Ptychodus anonymous and mosasaur tooth (Russelosaurine?) Just a few feet further I found an absolute heartbreaker. I could see black striations coming from the edge of a slab and my hopes shot up. As I turned the rock, I realized it was a shattered piece of a pliosaur tooth . Don't even think it's worth keeping... Pliosaur tooth, likely Brachauchenius lucasi I picked up my pack and headed to the last outcrop of Kamp Ranch. I was relieved to see the thick limestone was much more secure. As I examined underneath, I had my mind set on small Ptychodus teeth when I almost fell on my back from surprise. Cemented to the slab was a truly astonishing sight: Pliosaur Tooth! If that wasn't crazy enough, just centimeters below was a limb bone jutting out. I got out my excavating gear and carefully went to work. I don't carry b72 in the field, so each tooth fragment was extracted separately. Afterwards, the bone slid out pretty cleanly. I didn't find other similar material, so I'm not sure if the two are associated or it's just coincidence. Maybe someone familiar with reptile anatomy can say if the bone came from a pliosaur. The tooth came in 6 pieces Once I was home, I got straight to cleaning and gluing. The fragments had held up alright along the journey thankfully and the prep went smoothly. By the end, I was holding up the newest and greatest tooth in my collection! It is most likely Brachauchenius lucasi although Megacephalosaurus eulerti is also a rarer possibility (I don't have access to the paper distinguishing their dentition). Both of these pliosaurs represent the youngest pliosaurids in the fossil record which adds some extra coolness factor. That Woodbine plesiosaur tooth (possible basal Polycotylid) I found last week is interestingly tied evolutionarily with the demise of pliosaurs such as B. lucasi. Polycotylids had traditionally been placed in Pliosauridae until more recent findings moved them to Plesiosauroidea instead. This confusion is likely due to convergent evolution. As pliosaurs disappeared in the aftermath of the Cenomanian-Turonian Anoxic Event, it seems some Polycotylids evolved to fill a similar niche, moving away from gracile dentition (like my Woodbine specimen) and into a more robust form similar to B. lucasi. At least that is how I understand it. Brachauchenius lucasi most likely The second half of the neat discoveries is this reptile bone I found several centimeters below the tooth. I'm not sure it's associated. The high energy nature of the Kamp Ranch makes me wonder if it was just coincidence. Anyways, it seems to be a limb bone. If you look closely, you can see toothy scrapes that are probably from scavenging sharks. I tried to look for signs of serrated teeth, but I didn't see anything obvious. Some of the attached matrix is vertebrate rich with tons of little fish verts and other goodies. Anyone know if this is pliosaur in origin? @pachy-pleuro-whatnot-odon Reptile Limb Bone So glad I decided to have one last exploration before my move. I guess it's not like I will never hunt in North TX again, it's just that it will be much, much more rare. I've added so many new, fun, and interesting sites to my list this past half year, I'm a bit sad to leave them all behind. At the same time, I'm itching with excitement to make new discovers in the southern half of our big state. It won't be easy though! Look forward to more trip reports in the not-so-distant future . Thanks for reading
  20. Per Christian

    Plesiosaur or polychotylid jaw?

    Here's a partial jaw for sale. Seller doesn't know where in Morocco it's from but it's listed as a plesiosaur jaw. Could it be plesiosaur? I wonder if it's croc @pachy-pleuro-whatnot-odon
  21. Can anyone help to identify whether this is a pliosaur tooth? The seller listed it as a Brachauchenius lucasi tooth, and its locality is Eutaw Formation, Mississipp.
  22. Jared C

    Brachauchenius lucasi tooth

    From the album: Texas Cenomanian (Cretaceous)

    Brachauchenius lucasi (Pliosaur) tooth Cenomanian Texas The last of the American Pliosaurs. Making this find was explosive and memorable
  23. Macrophyseter


    Estimated 160 mya.
  24. Hi everyone, I recently bought this tooth on a whim. It was described as Diplocynodon sp. from the Kimmeridge Clay and reworked into the Albian-age Faringdon Sponge Gravels at the Wicklesham Pit. However, this description is obviously wrong in either species attribution or locality, since Diplocynodon is an alligatoroid genus dating to the Paleocene to middle Miocene, and could therefore not possibly have been found in the Sponge Gravels as Wicklesham Pit. Going by the label that came with the tooth, however, the seller whom I bought the tooth from just copied the information on the label provided by the person they bought the tooth from (I think I recognize the labelling-style, which means I may have a lead to trace the provenance - although that would very much depend on how long records are kept by that other seller and on how long ago the tooth left them). As the tooth isn't rolled, as much of the material form the Sponge Gravels is, and in preservation also doesn't match the buff through orange to deep red colours of most other Kimmeridge Clay material I've seen - whether from Faringdon or elsewhere (mainly Abingdon) - I'm pretty confident this tooth doesn't come from the reworked deposits at Wicklesham Pit. Rather, the state of preservation reminds me of finds from the Oxford Clay. In fact, the root of the tooth has some black deposit on it, that I take to be oxidized pyrite - something I've learned from this thread to be a not uncommon feature of Oxford Clay fossils. Another option as to the tooth's origin is that the tooth could come from Hamstead on the Isle of Wight, where Diplocynodon is known to occur. The dark/black colouration of the tooth and traces of what appears to have been buff-coloured matrix - as opposed to the light grey one of the Oxford Clay - may point in that direction. Though I consider this possibility less likely than the Oxford Clay one for the reasons set out below. Turning to morphology, the tooth doesn't seem to quite match examples of Diplocynodon I've been able to find online. For, while my tooth is densely ornamented with strong striations and exhibits - as far as I can make out - only one possible carina ("possible", as it may just be an apicobasal ridge), other teeth I've seen are mostly smooth/unornamented with what look to be two carinae (although alligatoroid teeth can have anywhere from zero through two carinae and I've also been able to find at least one Diplocynodon-tooth specimen with striations). Moreover, my tooth is conical, which at least rules out the more robust "short but wide" Diplocynodon morphotype. Diplocynodon hantoniensis teeth, Lower Hamstead Beds , Hamstead, Isle of Wight (source) Diplocynodon sp. teeh from the Faluns of Touraine, region of Savigné (source) Diplocynodon hantoniensis from the Eocene deposits at Barton, Hampshire; note the striations This brings us to a closer examination of the features of the tooth's ornamentation, as seen under a microscope. Visible are not just the black deposit on the root and strong and dense striations referred to above, but also what I make out to be remnants of the fossil's original yellow matrix; reticulation of striae; striations stopping close to the base of the tooth, rather than reaching the full apicobasal height; the overall texture of the enamel in between of the striae; and partial cross-section through the tooth enamel. In particular with respect to the cross-section, it may be useful to have a look at the below illustration, figure 4 from McCurry et al. (2019). For, of course it could just be my imagination, but I see greatest similarity with specimen A - that is, the brachauchenine tooth marked as P. interruptus (but see here for a discussion on the validity of this species). Cross-sections through the teeth of A. Polyptycodon interruptus, B. Globidens alabamensis, C. Goniopholis crassidens, D. Spinosaurus aegyptiacus, E. Ichthyosaurus communis, F. Zygorhiza kochii Similarly, if I look at the below diagram of dental ornamentation amongst various clades of marine animal (figure 2, ibid.), I find greatest semblance with tooth D, sauopterygia, pliosauridae indet. (although an argument could be made for A, crocodylomorpha, Deinosuchus rugosus, could be made as well). Phylogenetic distribution and morphological similarity of apicobasal ridges: A. Deinosuchus rugosus; B. Spinosaurus; C. Ichthyosaurus; D. Pliosauridae indet.; E. Globidens alabamensis; F. Hydrurga leptonyx; G. Mammalodontidae indet. I see further comparability in ornamentation when looking at images of the below tooth: As such, I believe that the tooth under discussion here is, in fact, a pliosaur tooth from the Oxford Clay. Moreover, seeing as the density of the striae all round and smooth enamel surface in between, I'm thinking the tooth might belong to Simolestes vorax. However, the traces of yellow matrix make me wonder whether the tooth indeed derives from the Oxford Clay, whereas the few vermiculations visible at the base of the tooth - rare on S. vorax - and the tooth's overall colour make me hesitant whether this might not actually be a Liopleurodon ferox (although I'd think the density of striations would be quite high, in that case; but for comparison with another small L. ferox tooth, see here). As it stands, I guess my questions are: Are the traces of yellow I'm seeing on the tooth indeed remnants of matrix, or could they be dried up glue? Where was the tooth found, what deposits does it derive from? Did it indeed come out for the Kimmeridge Clay, or did it come from either Oxford Clay or Hamstead Beds? Does this correlate with the traces of matrix seen on the tooth? Considering the geological origin of the tooth, is it more likely to be crocodilian or pliosaurian? Is the species attribution correct? That is, if crocodilian, is this indeed a Diplocynodon tooth? And if it were pliosaurian, does it belong to S. vorax or L. ferox? Thanks for your help! @paulgdls @PointyKnight @DE&i @RuMert @Jesuslover340 @caterpillar
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