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Showing results for tags 'Plesiosaur'.
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Hello! Indulged my hobby a little this weekend (4-7 Mar) and headed to Lyme Regis for some sunny ammonite hunting. Found this while digging on East Beach there… I’m nowhere near experienced enough to determine if it’s even a fossil at all, but it was such an odd shape and I thought I’d ask! About 1 3/8 inch (3.5cm) across and approx 1 inch (2.5cm) thick. Found 5 March 2022 on East Beach, Lyme Regis, Dorset, UK. See photos below for details. Thank you everyone!
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Hi all! I've been really busy creating all these watercolour illustrations based on fossils from the Jurassic Coast. Here we have an Ichthyosaur, a Plesiosaur, an Ammonite, a Scelidosaurus and a Belemnite. There will be a few more to come soon...
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Recent finds from my new year day adventure. Found these two teeth within 2 feet of one another. One I am confident in saying is a Mosasaur but the tooth on the right I need some help with! If anyone can shed some light it would be appreciated! Thanks
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Lyme Regis plesiosaur propodial with pyrite disease - how to treat
pachy-pleuro-whatnot-odon posted a topic in Fossil Preparation
Hi all, A couple of years ago I acquired a lovely pair of plesiosaur propodial bones from Lyme Regis. It was a matched pair of both humerus and femur. Today, when I was looking to make space in my cabinet for a new acquisition I had made, I discovered some odd dust next to the humerus that, on inspection and to my horror turned out to be pyrite bloom! I immediately removed the specimen from the cabinet, checked the other podial and nearby fossils, and used a tooth brush to brush of the most direct traces of pyrite decay. But the question is: what now? How do I ensure the propodial's preservation, and make it safe for display again. Should I store affected piece in an open or closed container? I suspect the latter, together with silica beads to consume any excess moisture might be best right now. But how do I get to the point where I can take it out again? Any suggestions are welcome. From my own thread on this topic I know of the existence of pyrite stopper, which sounds ideal for this situation. But I've also been warned that this is quite a hazardous solution and am therefore afraid of trying this out myself. So, part of the question would be whether someone offers pyrite treatment as a service, of knows of someone who does. Thanks in advance for your help! @Ptychodus04 @DanJeavs @paulgdls @RuMert and others
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I was able to obtain a couple of fossils found on the western coast line of France. The first one is presumably a piece of paddle bone from the upper tithonian, found between Wimereux and Cap de la Crèche. It measures about 220 x 160 x 65mm. Very heavy. The second is a vertebra found between Cap d'Alprech and Equihen (Tithonian). Measuring about 80 x 65 x 35mm. Could these be pliosaur or rather plesiosaur fossils? I'm sure they are too worn to identify better than sp.? Thanx for notes!
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From the album: Late Jurassic plesiosaurs from the Volga
Ulyanovsk Oblast, Undory, Kimmeridgian, pyritized-
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From the album: Late Jurassic plesiosaurs from the Volga
Probably Late Kimmeridgian. Ulyanovsk Oblast, Undory -
This fossil is in my collection for a while now. It is a quite heavy propodial found in Weymouth, Dorset, UK. It measures about 27cm in length. It's 12cm wide at the end, 6cm wide at the start. The centre part is 5 to 6 cm thick. I suppose it is Pliosaur (Stretosaur?), but it might be Plesiosaur instead? Thanx for opinions!
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- dorset
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Actually a Polycotylid Vertebra?
Opabinia Blues posted a topic in Is It Real? How to Recognize Fossil Fabrications
Not sure if this goes here or in Fossil ID but I’ll post here… This is one of my latest online purchases, and one I had to snag because if this is what it’s supposed to be it’s a neat piece. But seeing as I can’t personally verify it myself, I thought I’d post here. This vertebra was being sold as Trinacromerum sp. While I doubt that just a centrum like this is identifiable down to genus, I would like to know whether or not this really is a Polycotilid vertebra. I think it’s likely because it’s a very sizable bone that’s not mosasaur, but just want to check. This fossil is, according to the seller, from the Niobrara Chalk of Kansas. And as can be seen, this fossils as pretty obviously been flattened by geology. Thanks!
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North Carolina mosasaur, plesiosaur, or dinosaur vertebra fragment
fossil_lover_2277 posted a topic in Fossil ID
Here’s a vertebra fragment I found in Cretaceous Black Creek group sediments of North Carolina. It’s not turtle, and it doesn’t look like any crocodile vertebra I’ve ever seen. That would leave mosasaur, plesiosaur, or dinosaur. Personally I think it’s mosasaur, but I could be wrong and it may not even possible to ID further. Any thoughts?
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What's covering my plesiosaur vertebra? How to clean
pachy-pleuro-whatnot-odon posted a topic in Fossil Preparation
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?
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Plesiosaur tooth Asfla Goulmima Morocco
Jurassicz1 posted a topic in Is It Real? How to Recognize Fossil Fabrications
I have been thinking of buying this Plesiosaur tooth but I want to be sure its real and in well condition. Its from the Asfla Goulmima in Morocco. Turonian. Seller says its libonectes morgani.
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I just recently found this bone in the Cretaceous Black Creek group deposits of eastern North Carolina. I originally thought it was an oddly shaped shark vertebra, but now I think it might be a worn plesiosaur vert. based on the images I looked up online. The overall cross sectional shape is elliptical, and the center looks much too thick for shark (doesn’t pinch in towards the center). Any thoughts? Thanks!
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From the album: Robs Fossil Collection
Lower Cretaceous Plesiosaur Tooth from Russia A very nice, well detailed tooth from this Cretaceous species of plesiosaurus Found:- Seversk Sandstone, Upper Albian, Lower Cretaceous, Stariy-Oskol, Belgorod Gebiet, Kursk, Russia Age:- 100 Million Years Old. Size = 2.2 cm long -
Hi, I have this tooth from the Akrabou Formation in Morocco, and I was told it is a Plesiosaur tooth most likely belonging to the genus Libonectes (An Elasmosaur). I just wanted to get an opinion if the id is correct or whether it could belong to something else like a Polycotylid. The tooth is just over 3cm in length. Thank you!
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From the album: Robs Fossil Collection
A Plesiosaur tooth from Khouribga, Morocco. Features a couple of repairs. Size: 1.69 inches Age: 65-70 million years Locality: Khouribga, Morocco -
Hi, any thoughts on this, from Lyme Regis? It is sold as Plesiosaur, but does anyone know if that is accurrate or if it is ichthyosaur? Thanks
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Help with IDing tooth from North Sulphur River, Texas. Fish? Marine Reptile?
bluefish1766 posted a topic in Fossil ID
Hi all My kids and I found this tooth a while ago from the North Sulphur River in Texas. We can't figure out its ID and would appreciate any help. There is no carina; however, there are deep groves at the base. It appears cylindrical. After looking at various images, I can't tell if this is from a fish or a marine reptile like at plesiosaur. Images are below; the scale is 1 mm between the smaller hashmarks. Again, thanks for any help! Bret
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Hey fossil friends. I found this worn vertebra earlier in the year When forum member @DanJeavs prepared this for me it revealed a very rare find for the Whitby coast. It is either a Plesiosaur or Pliosaur backbone. Anybody know what the difference is?
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Hi all! In continuation of the previous reports. Less text, more pics Bits of scenery:
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Hi all, here are more pliosaur teeth questions from me.. these are from the Asfla Goulmima Morroco Cretaceouds turonien. I'm fairly certain the stubby one is pliosaur but seeing as I've been mistaken more than once, I'd like to ask here. I think the slender is plesiosaur, but again.. I'd like for people with more knowledge than me to pitch in
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Hello, I have a simple question but I can't find the answer and I think many of you probably know the answer. Is the taxon Ichthyosauria a part of the taxon Plesiosauria? I want to start learning more about Ichthyosauria and this fact simply bothers me not to know.
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Hi everyone! Found these two specimens in the Upper Albian Burim formation in Ukraine. Would appreciate any help with ID! 1. So this 1.2 cm tooth is as basic as they get - no carinae, no enamel ornamentation (enamel is there by the way), circular cross section and this really weird apical twist. When I found it in the sieve I thought it was a Polycotylid plesiosaur, but lack of striations is not typical of plesiosaurs. Can't find a large fish without carinae either (Icthyodectids, Enchodontids, Protosphyraena, Pachyrhizodus and other pachycormids all have carinae), although enamel is quite thick and definitely looks more reptilian. Crocs also have carinae. Apparently, Ctenochasmatid pterosaurs can have all of these features, but this tooth is quite robust for a pterosaur. I am confused... For comparison, other stuff from this locality left to right: Icthyodectid, Protosphyraena, Enchodus, Platypterygiine ichthyosaur, Polycotylid, Elasmosaurid tooth tip and Ornitocheiroid pterosaur 2. Well, for this one I am pretty sure it is a teleost of some kind. At first I thought it is a very worn tooth in a jaw section, but the overall shape is inconsistent with fish jaw bones. It seems relatively complete, so it would be great if there is anything diagnostic. (6 cm) @pachy-pleuro-whatnot-odon @Mike from North Queensland @ anyone else
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Pliosaur & Mosasaur Tooth Collection from Central Texas
LSCHNELLE posted a topic in Member Collections
Attached are pictures of my collection of four isolated teeth from Travis County, Texas with limited identifications. I am not an expert on pliosaurs, plesiosaurs, or mosasaurs. I just know fairly accurately in which member of a specific formation I found these teeth. All of these were located in or near a shell hash layer associated with oyster fragments, Ptychodus, or other regular shark's teeth. (1) 10/2/2017 - Upper South Bosque - ~91 mya - first picture (as cleaned). (2) 6/15/2018 - Lower Bouldin Flags - ~95 Mya - first picture (as found), second picture (display). (3) 10/28/2018 - Lower Bouldin Flags - ~95 Mya - first picture (as found), second picture (as cleaned). (4) 7/16/2021 - Lower Bouldin Flags - ~95 Mya - first picture (as found), second picture (as cleaned and bonded).- 32 replies
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British marine reptile teeth, pliosaur? Ichthyosaur? Croc?
Per Christian posted a topic in Fossil ID
Hi everyone I came across this box of marine reptile teeth from: Age 200 million/Rhaetic bone bed. I don't have the measurements of the fossils unfortunately, but do anyone see plesiosaur and ichthyosaur teeth here? I'd love it if there's pliosaur but probably not..
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