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Found 123 results

  1. Mosasaur vs

    How can you tell the difference from mosasaur and Plesiosaur from NSR?
  2. I've always been fascinated by the Cretaceous sea and its myriad of terrifying carnivores, many that would've made Jaws look meek. After watching BBC's Sea Monsters, I made it my goal to compile a box of sea monster fossils. I started this journey 10 years ago, and finally completed the box recently. Allow me to present my Predators of the Cretaceous Sea collection, and take you on a journey to the most dangerous sea of all times. The box measures 20.25 inches long. Inside are 24 unique predator fossils. I will introduce them from left to right, top to bottom: Rhombodus binkhorsti Age: 70.6 - 66 mya | late Cretaceous Formation: Severn Formation Locality: Bowie, Maryland, USA Size: 1 meters Diet: Molluscs and crustaceans art by Nobu Tamura --------------- Polyptychodon interruptus Age: 105.3 - 94.3 mya | Cretaceous Formation: Stoilensky Quarry stratigraphic unit Locality: Stary-Oskol, Belgorod Oblast, Russia Size: Maybe 7 meters (This is a tooth taxon so size is not confirmed) Diet: Anything it could catch Note: If you consider Polytychodon a nomen dubium, then this is a Pliosauridae indet. art by Mark Witton ----------------- Prognathodon giganteus Age: 70.6 - 66 mya | late Cretaceous Formation: Ouled Abdoun Basin Locality: Khouribga Phosphate Deposits, Morocco Size: 10-14 meters Diet: Everything art by SYSTEM(ZBrushCentral) --------------- Coloborhynchinae indet. Age: 99.7 - 94.3 mya | late Cretaceous Formation: Kem Kem Beds Locality: Southeast Morocco Size: 7 meters (high estimate) Diet: Fish and cephalopods
  3. Are there ways to differentiate long neck plesiosaur bones vs. pliosaur bones*(specifically vertebrae from the kimmeridge clay in this case), other than by size, in some cases? *or any of the paddle bones
  4. Mosasaur or Plesiosaur?

    I found a tooth in Bladen County, NC at a site on the Cape Fear River near Elizabethtown. The site is Upper Cretaceous, and is Upper Campanian in age. It's in the Black Creek Group. I know that the tooth isn't in the best of shape, but hopefully is identifiable. All the Mosasaur teeth I had collected there before are a black color. I noticed this tooth is also curved from side to side. I don't know if it's a Plesiosaur or Mosasaur tooth. Both have been found at this site, but the Plesiosaur is far less common.
  5. Plesiosaur tooth/teeth?

    This kind of tooth surface, with the ridges, isn’t that for the most part, not a common plesiosaur feature? This is from Lyme Regis....what would you all think?
  6. Plesiosaur verts?

    Please offer any comments as to the ID of this piece. It was acquired years ago from Poland; but it was reportedly quarried at a Cretaceous site, Goulmima, Morocco. The matrix proved to be far too hard for the low powered tools I utilize for prep; so the piece languished in the garage for years. Finally it was shipped to Kris in Tx. Below is the account of his prep travail. As stated, it was labeled "Plesiosaurus, Cretaceous, Goulmima, Morocco." Any conformation or condemnation will be appreciated. I have real trouble visualizing the relationship between the appearance of the "front" and the "back" of the piece. To my eye it is almost as if the "back" represents the imprint of a different string of verts?!? Here is the display side that finally emerged. Here is the "back" side which was partially visible when the piece was received. Thanks for any observations.
  7. Hello, this is my first post on the forum so firstly I apologise if I have done anything wrong. I brought these teeth a number of years ago and have only just got round to sorting them out. The first one was listed as Jurassic crocodile tooth and the second as Jurassic Plesiosaur tooth, they both come from the Oxford clay around Peterborough. I would really like to put a species name to these teeth if possible so any help would be greatly appreciated. My initial thoughts were Metriorhynchus for the crocodile tooth and Cryptoclidus for the Plesiosaur but I am a complete amateur and would love some help from professionals. Finding information online about the Oxford clay seems to be very difficult. Thanks in advance for your help.
  8. Hello! I am an MPhil student studying plesiosaurs, I am really struggling to locate Cretaceous aged specimens. Since I am based in the UK, most of the museum collections contain Jurassic age fossils so you can image I have an abundance of these! I thought it would be best to ask on the fossil forum since people from all over the world use this. Does anyone know of any museums in Europe or the US that contain large marine reptile collections that might contain a lot of plesiosaurs?
  9. I've spent a fair amount of time now combing the beaches around Lyme Regis and Charmouth in Dorset, England, and thought i would put together a topic that presents all of my marine reptile bone finds (so far) in one place. The fossils here are Early Jurassic in age, approx. 195-190 million years old and come predominantly from the Blue Lias and Charmouth Mudstone formations. I first visited this area in 2013 with the simple goal of finding at least one ichthyosaur vertebra, and now after three subsequent trips in 2014, 2017 and 2019, i've put together a far better assortment of finds than i could have possibly hoped for! I think i have been quite lucky along this coastline, although it has taken many hours to amass this collection. Across all four of my England trips i have spent a total of 18 days looking for bones in the Lyme Regis area, most often on the stretch of beach between Lyme Regis and Charmouth but sometimes at Monmouth Beach as well. This coastline also produces a large quantity and diversity of ammonites, belemnites, crinoids, bivalves, brachiopods, gastropods, and even rare insects. However i've always been most interested in fossil vertebrates, and so the ichthyosaurs and plesiosaurs that are found here have been my primary target for collecting. There are also some impressive articulated fish to be found, but as yet i have had no luck in finding any! Ichthyosaur bones are the most common type of vertebrate fossil in the area, particularly their bi-concave vertebrae. Less commonly you can also find pieces of the jaw, sometimes with teeth. If you are extra lucky though you may also find plesiosaur bones, which for whatever reason are much rarer than those of ichthyosaurs. The best way to find any type of marine reptile bone around Lyme Regis is to closely examine the shingle on the beach, and i've spent seemingly countless hours bent over and slowly walking along the shore looking for them. If you have a bad back it's even more difficult! I've learnt that bones can be found pretty much anywhere on the beach: in the slumping clays, at the top of the beach in the 'high and dry' shingle, along the middle of the beach, at the low tide line, and also underwater amongst the rocky pools and ledges. And just when i start to think that the beach has already been heavily searched and there isn't much left to find, there always seems to be another bone that turns up, often lying in plain sight. The truth is that most people who visit here to collect are not experts and will probably walk past a lot of these bones, as the texture is the most important thing that gives them away and learning to recognise it takes a bit of time. For the sorts of articulated skeletons that sometimes make news headlines and are beautifully intact, searching the shingle is not the way to go, but for a short term visitor like me i think it is the best way of maximising the chances of finding any sort of reptile bone in the shortest amount of time (and something i can take back with me on the plane too!). Without further ado, here are the pics (spread across multiple posts due to file size limits). I've also included as-found pictures for some of these finds to provide a sense of what they look like and how they are found when they are on the beach. The collection so far. Starting first with my favourite Lyme Regis fossil, this is a very nice plesiosaur vertebra that is in great condition! A very rare find! I have been very fortunate to find two plesiosaur vertebrae at Lyme Regis so far, although this one is smaller and more beach-worn than the previous example. Continued below.
  10. Hi all My son and I were looking through some teeth from the NSR and want to get your opinions on this one. We first thought that this was a mosasaur tooth; however, someone suggested that it may be a plesiosaur/elasmosaurid tooth. We wanted to gather some more opinions since we have no idea what it is. The tooth measures 16 x 6 x 6 mm. Thanks and Happy New Year!
  11. Teeth like this confuse me - i believe it is either a Plesiosaur or Pterosaur tooth (listed as Pterosaur from the seller) and it comes from the cretaceous sediments of Stariy Oskol, Belgorod region in Russia according to the description. It is 4cm in length. Any idea what this tooth most likely is? Thanks.
  12. Appendate fossil?

    I’ve never even heard of an appendate bone/fossil, but I’ve definitely never seen on in marine reptile appendages(specifically plesiosaurs). I’ve seen plenty of full paddles, but never anything other than the finger bones/phalanges(?). Do they have any? What does? And is this one?
  13. NJ Cretaceous Tooth - Croc, Mosasaur?

    Found in NJ Cretaceous stream. Not sure if its sawfish, croc or possible mosasaur. Thoughts?
  14. Goulmima teeth identification?

    Hi, i asked previously about a couple of Pliosaur teeth which i now have, but there are these two other teeth from the Goulmima site in Morocco that look quite different and i was wondering if they could be Polycotylid teeth or from some other marine reptile. The first tooth is 6.2cm (2.44 inch) and the other tooth is 4.1cm (1.6 inch). Is it possible to narrow these teeth down when the enamel looks worn?. Thanks.
  15. Potential Plesiosaur paddle bone

    Hi everyone! I found this bone today, my first "proper" dinosaur bone I think! Am I right in thinking it's from a plesiosaur paddle bone? Thanks! Measurements are in cm. Location: Conway formation, New Zealand
  16. https://www.livescience.com/amp/ancient-sea-monster-pliosaur-fossils.html What are your thoughts?
  17. Hi all, I was recently offered this tooth from late Cretaceous of Orensburg, Russia. Most likely Gaisky City District. I can't figure out if it's a Polycotylid plesiosaur or Pterosaur tooth. The overall shape is closer to pterosaur than plesiosaur. However, I am not aware of pterosaur having wrinkling like that, nor do I know of pterosaur teeth being found there. What are your thoughts on this? Thank you.
  18. Hello there fossil forum! This post will actually contain some of my finds from 2 trips to the same location, namely the island of Bornholm in Denmark. I went there this summer, and made quite an interesting discovery, which I will get back to, and then went on yet another trip, which I got home from less than a week ago. I doubt many of you know about it, unless you're Danish or have an interest in the geology of Denmark, but most of Denmark was underwater for pretty much all of the Mesozoic era. That is, of course, with the exception of Bornholm, which is a geologist's/paleontologist's/amateur fossil collector's dream. Denmark is not well known for any dinosaur fossils whatsoever, except from a few teeth found in the Robbedale Formation, and a bunch of foot-prints scattered along the west and south-coast of Bornholm. As recent as last year in April though, someone discovered the very first dinosaur bone in Denmark, at Hasle Beach, Bornholm. It's supposedly from a young sauropod, and is still being studied at this very moment. After I heard of the discovery, I desperately wanted to go to Bornholm. So I went there for 5 days in July, and 7 days in October, where the second time, I brought some of my friends from my heavy metal band along with me. On the first trip, the very first day at Hasle Beach, I searched for about 5 hours along the beach, with not a single fossil in sight. Just as I was about to leave the beach to get something to eat, I stumbled upon a very odd looking rock. Which obviously wasn't a rock, it was a bone: It measured about 6x5x6 (LxWxH) cm. I brought this into the museum located at the island, called "Naturbornholm", which is where a lot of the fossils found on the island are showcased. I had some of the people from the museum take a look at it, and they agreed on that this was definitely bone. What was very unlikely about this bone however, is that it looks like the end of a limb-bone, meaning it probably wasn't a plesiosaur, but something that was able to walk on land. In Denmark there's a law concerning fossils, saying that if the fossil could be valuable to science, it is obliged to deliver it to the Geological Institute of Copenhagen for research. The bone is currently being examined and studied. I still haven't received any new information regarding the bone. However they have said, that there's a good chance it's probably from either a crocodile, turtle or dinosaur. Whatever the species might be, it is most likely also a new species, as most of the bone material found at Hasle are plesiosaur bones. I went digging in the exact same area for the rest of the days, in hope of finding other bone-pieces. The picture below shows other pieces I found, which according to the museum, are bone fragments. Some of them are very worn though, and covered with conglomerate and iron. They are in no way as well preserved as the slightly worn bone piece I found on the first day: Other than those, I found another piece of bone, however it is very hard to tell what it is from. I'm considering trying to open up the lump of sandstone, however the black layer of bone material is fragile. The picture quality might be bad on this one, but I can assure you, it is not coal or mineral: So after the first trip to the island of Bornholm, I was invited over there by some of the people from the museum in the autumn holiday. I brought some of my bandmates with me as well, in an attempt to up the amount of fossils we'd find. And we did find a lot of stuff. On the first day we started out slow. The guitarist from my band was the first person to find a fossil. He found a small tooth, which might be from a type of bony fish. We're currently talking with one of the paleontologists of the Geological Institute, who wants to have a look at it in person. It measures about 5 mm, and was cracked in half when found, but afterwards repaired. The second day, we went out digging up on the more northern side of Hasle Beach, where the cliff is a bit taller. We didn't find much though. The other guys went back to the hut after a few hours, and I worked my way back to the spot where I had been digging during the summer. Shortly after, I found a small fragment of bone, most likely a rib-fragment. It's probably not from a plesiosaur though, as all the plesiosaur ribs found on the beach are usually very round, and not flat. The next day, we all went to the museum, showing a few of the fossils we had found to the people we knew there. Other than that we took a look at all the awesome finds exhibited at the museum. Including 2 of the dromaeosauroides bornholmensis teeth found in the Robbedale Formation (1 of them was a replica though). Most of the dinosaur fossils found, as showcased by the museum, are trace-fossils. Dinosaur-tracks and coprolites, with the exception of the dromaeosaur teeth. However those are from the early cretaceous period (140 million years ago), while the place where we were digging, Hasle Beach (The Hasle Formation), is about 170-180 million years old. Later I went digging again the same day. Some of the others didn't feel like digging, so I went out alone. I searched in about the same area where I had found the bones last year, and got really lucky once again. First I found a nice jet-black hybodont shark tooth, measuring about 9 mm in length. Then a piece of fossil wood/branch shortly after. 2 hours after the last find, I decided to go back to the cabin we had rented not far from the beach, and once again I was super lucky, and then stumbled upon a large bone-piece! A plesiosaur paddlebone, measuring about 4x4x1 cm! The fourth day, the other guys wanted to get back in the game after showing them the paddlebone. The next day we found a couple of odd pieces, mostly shells, but also another tooth, this time it was a chimaera tooth. On the fifth day, we went to a slightly different location, about 4 km further south of Hasle Beach, at a place called "The Pyrite Lake", where there's an abundance of plant-fossils, but there has also been found a couple of plesiosaur teeth there, as well as large dinosaur tracks. These tracks, as shown at the museum, are not negatives however, but a "positive". As in, when the creature made the track, the track was filled up with mud or another sediment later, basically making a 'positive' "sculpt" of the foot so to speak. At the Pyrite Lake, we found some huge chunks of fossil wood. Some a tad too heavy to carry around in a rucksack. We did however also spot a very interesting-looking rock, that shared a big resemblance to the dinosaur-tracks at the museum. We sent the coordinates of this rock to the people at the museum, and they're gonna send a paleontologist out to take a look at it at some point, to try and determine, if it is indeed a dinosaur track. So it's going to be interesting to see, if this truly was made by a prehistoric animal, or if this is just a very funny looking rock. On the sixth, and last day of digging, we found a lot of odd looking fossils by Hasle Beach again, which we could not identify. One may have been a bigger, but crushed, hybodont tooth, trapped within a lump of sandstone. And another could be a rib or just some plant-material. Either way, we left a lot of the fossils at the museum, for them to take a look at, if any of it should hold any interest to them, or to the people of the Geological Institute of Copenhagen.
  19. Big Brook NJ Trip

    Hi. I went to Big Brook again on Friday for my weekly quick trip. We had a really bad rain storm mid week so the the water was the highest I have ever seen it and the creek floor was like quicksand because of the 8-10 inches of fresh sand and other snarge. Every time I took a step my foot would sink down. The first 2 hours was nothing special. More of a struggle getting around. But the last hour I found a very productive spot. I posted one of the finds in fossil I’d. A big thanks you to @The Jersey Devil for all is patients and help with ID. Enjoy the pics. Hope I ID everything correctly. Plesiosaur tooth. Super excited about this one!
  20. I can’t figure out if these are 2 associated jaw pieces. In most pictures they sure look it, but some pictures make me second guess it, and if they aren’t, they’re definitely still the attaching pieces, even if from different animals. I was looking at it backwards for awhile, which set me back, but I figured out the thicker part is actually the front of the jaw, right before the curve, or right after it starts, if it’s been glued on at the incorrect angle, which I think could also be possible. the 1st picture looks very strange because of how that smaller section suddenly drops down and gets taller, and especially strange after researching and finding out that it’s supposed to get wider there, but actually SHORTER. the 2nd picture looks good, except it MIGHT supposed to start slightly curving inward at the point of reattachment pics 1,3,4,6,&7 all make it look like they rent supposed to be associated together, but the other pics make it look very accurate. I don’t know what to think, so I thought I’d see what people with much better knowledge than I, think about it.
  21. Probably Plesiosaur bones

    From the album Holzmaden

    This seems to be a kinda rare find because maybe these are plesiosaur bones. Plesiosaur is the rarest marine reptile in the area of Holzmaden so I am pretty happy with this find On the plate are two ribs, a phalange and an interclavicle. But I am far away from being with the ID although I already showed it too some local experts. Its from the quarry Kromer near Holzmaden (Lower Jurassic, Posidonia Shale). Unprepped: Some more pictures of the prepped specimen:
  22. Hi, How can you tell by isolated bones, besides the skull, if you see a pliosaur or plesiosaur remains? Any obvious differences in paddle bones or vertebrae? Triangular teeth? Does it all depend on the given species? Thanks
  23. Jurassic marine life ID

    Hi all, Would be great to have the following pieces ID'ed. Jurassic shallow water sea (Kimmeridgian-Tithonian, possible Hauterivian). Sorry for varnish. Thank you. 1. Large vertebra, that doesnt look like usual plesiosaur, weight 1,4 kg. If it is something terrestial, it would have high scientific value. Already asked for ID but didnt get many replies.
  24. Back to childhood

    Hi all, This is a report on my recent fossil hunting trip to Ulyanovsk region, Russia, inspired by the most interesting stories and pictures I read and looked up here. I took many photos myself in an attempt to convey the atmosphere. I dont think you know much about Russian fossil hunting spots, so I start with a short description of the place I visited. Ulyanovsk Oblast (region) is located in the middle Volga basin and much of its territory is covered by a part of the Kuybyshev Reservoir (largest in Europe). Its sometimes called Kuybyshev sea and for a reason: with distance between coasts reaching 30-40 kilometres, unless the weather is super clear, the other coast is not visible. Add frequent stormy weather with high waves and the impression of a sea is almost complete. Creating the reservoir lead to big scale soil erosion with prehistoric layers coming to surface. They are constantly washed away with fossils becoming available by simply walking along the shore. Basically all the western coast in the region is covered with late Jurassic-early Cretaceous deposits, mostly Kimmeridge clay (155 ma) with Hauterivian layers (130 ma). The fossils are good quality and do not require any preservation except the fact they are often pirytised thus subject to oxidation. The place is (or was) very rich in sea fossils: ammonites, belemnites, reptile remains etc. They say at least 3 reptile genus and 20 species were recentlydescribed by the remains found here, for instance Undorosaurus (name derives from local village's name), Makhaira rossica, Luskhan etc. Paleontology sections of three regional museums (Ulyanovsk, Tatarstan and Samara, with some going to Moscow) feature impressive exhibits taken from here including compete or almost complete sea reptile skeletons. (You can see some of them here, here and here). Unfortunately there have been too many guys looking for fossils and fine pieces of local yellow calcite to sell, passing like a vacuum cleaner picking up everything valuable from early spring to late autumn. By the way, a nature reserve (zakaznik on a regional scale, which itself is pretty weak) was created here in 1980s right to counter this situation, but with lack of effort it turned into a joke. The local village museum was charged with enforcing the reserve status - let's assume its management did not have the funds or personnel to prevent anybody from picking up fossils (not to assume they were picking them up themselves alongside the poachers without reporting them to the public). Anyway as a law-abiding citizen, I was collecting outside the reserve's boundaries. Here the fossil-rich shore is marked in green, the reserve in red and 3 main fossil-related villages in blue. I used to spend vacations in a local sanatorium as a schoolboy and accumulated quite a collection of local thingies ( I sure was fascinated by my findings and paleontology in general). In April I decided to spend there a couple of days again. The receptionist asked if I had been there before. Only in childhood, I replied. She laughed - nothing had changed since then. Well, I hoped so:)
  25. Hi, I was wondering if this tooth could be from a Pliosaur. It is from the Goulmima area in Morocco. It is 8.8cm in length and some of the striations remain near the tip (the size is what makes me think Pliosaur). Thanks.
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