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Showing results for tags 'plesiosaur'.
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From the album: Texas Cretaceous Fossils: Reptiles and Amphibs
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After great input from the community, the tooth is likely a Plesiosaur and not Mosasaur. Thank you everyone! For my birthday last weekend, my girlfriend and I returned for our second trip to Big Brook in New Jersey. I couldn't have asked for a better day. We came into the day joking about finding a Mosasaur tooth for my birthday... well.. the luck of the Irish was on my side. Braving the still frigid water and sub 40 degree temps, I was rewarded with my first ever Mosasaur tooth. I would also like confirmation that it is Mosa and not crocodile. Unfortunately it is not whole, but it is rather large, and I couldn't be happier. In total we found around 111 teeth and some other non teeth related fossils. Most were shards, broken, or unremarkable but below are the complete and nicer finds of the day. Thanks for looking and any comments! Shoutout to the Philly Fossil Collector on instagram for helping me with ID and advice! I don't remember your username on here though! Partial Mosasaur tooth: Any information known on my specific find, I would absolutely love. Overall complete and nice finds of the day (Me). Partial Mosasaur tooth Shark teeth: Crow, Goblin, Mackerel. Any others? Shark Vert? Enchodus teeth (2) Pycnodont Fish Crusher Tooth Chunk of obsidian/phosphate? Ill have to follow up with some pictures but when in the water it had streaks of gold like pyrite. Shark Vert? My girlfriend found this one, would love confirmation on what type of vert. Check out the coloring on this beautiful tooth. This is the smallest whole tooth I've ever found, anyone know the ID? 18206F19-E91F-40B7-BCD2-82154A49D0D5.mp4
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- big brook
- big brook preserve
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Hiya guys! I'd like to ask help for ID. This tooth in matrix is from Akrabou Formation in Goulmima, Morocco, and I would like to know which polycotylid plesiosaur (maybe?) species can match this tooth🧐
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- akrabou formation
- goulmima
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Trying to ID these teeth from Pierre shale sd. Hard to get closer photo without blurring. Guessing mosasaur or plesiosaur but wondering if species type is possible. Thanks
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- mosasaur
- pierreshale
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Found possible skull but still unearthed. This point fell off which had others in a row, like a jaw. I took a pic before gluing it and plastering it up. Sorry for poor pic. Wondering if anyone can tell if it's tooth. And if so from what. Thanks
- 6 replies
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- mosasaur
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This is a marine reptile bone that i found nearly 10 years ago between Lyme Regis and Charmouth, which is famous for its Early Jurassic marine fossils (about 195 million years old). Although it is worn there is some clear shape that should indicate what bone it is, although i have so far been unable to figure it out. Realistically, it is going to be ichthyosaur (most likely) or plesiosaur in origin. Two ovular depressions/joint surfaces are clearly visible on one side of the bone. Furthermore, the flatness of the bone is real and not just due to wear (both main faces are the edge/surface of the bone). The side with the two suspected joint surfaces is the thickest side, and it slopes down to become progressively thinner opposite to them. A paddle bone of some sort is my suspicion but i am yet to see a clear match. Any ideas? Thanks!
- 6 replies
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- charmouth
- charmouth mudstone formation
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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?
- 4 replies
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- morocco
- plesiosaur
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From the album: Late Jurassic plesiosaurs from the Volga
Ulyanovsk Oblast, Undory, Kimmeridgian, phosphorite-
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From the album: Late Jurassic plesiosaurs from the Volga
Ulyanovsk Oblast, Undory, Kimmeridgian-Volgian boundary, phosphorite-
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From the album: Late Jurassic plesiosaurs from the Volga
Ulyanovsk Oblast, Undory, Kimmeridgian-Volgian boundary, phosphorite-
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From the album: Sonickmonx's South Carolina Finds
This vertebra is almost 4" in diameter. I found it in the Donoho Creek Formation. According to my references this is a massive plesiosaur vertebra. I have had some discussion around it, but have not had any evidence pointing to another culprit.-
- cretaceous
- donoho creek formation
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I recently acquired a tooth fossil from UK. The locality of the tooth labeled by the seller is Oxford Clay, but I suspect it might come from Faringdon Sponge Gravels due to its preservation. The tooth seems to have carinae, which rarely occurs on plesiosaur and pliosaur teeth. Can anyone help me identify this tooth? Would it possibly be a candidate for Dakosaur?
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- dakosaur
- faringdon sponge
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Sweden Marine Reptile Vertebra - Kristianstad Basin; Scanisaurus (?)
Kikokuryu posted a topic in Fossil ID
There wasn't a huge amount of information to go off of from what I found, so I was wondering if anyone here could help who is familiar with this material. I was not sure if the label and ID provided for this specimen was accurate or not, and the color doesn't seem to match up with the few specimens I've seen online which are more of a lighter brown to tan. Scanisaurus is maybe just used as a wastebasket term for most of what comes out of the deposit? Species: Scanisaurus nazarowi Age: Cretaceous, Campanian Formation: Kristianstad Basin Provenance: Northwest Skåne Province, Southern Sweden Just looking at the wiki, for plesiosaurids, there's Scanisaurus, cf. Elasmosaurus, and indeterminate polycotylids. Measurement is in centimeters.- 7 replies
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- campanian
- cretaceous
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From the album: Late Jurassic plesiosaurs from the Volga
Ulyanovsk Oblast, Undory, Kimmeridgian, pyritized-
- kimmeridgian
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Hi all! Here's a short trip report to show the diversity of fossil hunting conditions in the Jurassic. We have very few places with large inflated mid-Oxfordian ammonites, most of them are shown below. The red mark is on the site I discuss. It's on the Volga too, but much less accessible and productive than others. The site is situated some 10km to the east of Kineshma, a not-so-rich middle-sized town. I visited it in various seasons but couldn't catch a suitable water level. The shore is either under snow or the water is already high and remains high throughout the year.
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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?
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- 2
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- icthyosaur
- id?
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From the album: Late Jurassic plesiosaurs from the Volga
Undory, Ulyanovsk Oblast (1,2) and Kineshma, Ivanovo Oblast (3), phosphorite-
- kimmerdgian
- plesiosaur
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I recently acquired three tooth fossils from southwestern China initially labeled as a "Plesiosaurus indet." tooth. The specific locality of the tooth fossils is the Lower Shaximiao Formation, Zigong, Sichuan, China. The age of the Lower Shaximiao formation ranges from Early to Middle Jurassic. The only known plesiosaur species from the Shaximiao formation is Bishanopliosaurus zigongensis, a rhomaleosaurus. If these three tooth are indeed identified as a plesiosaur tooth, they probably belong to Bishanopliosaurus sp. Can anyone help me to identify whether these teeth are plesiosaur teeth?
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- bishanopliosaurus
- china
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I recently came across a "Dolichorhynchops" tooth listed for sale by a US seller. However, I am unable to personally verify its identity due to my limited knowledge of polycotylid teeth. Based on the provided pictures, the tooth fossil exhibits a strong curvature and appears to have ornamentation solely on its lingual surface. Do these characteristics suggest that it belongs to Dolichorhynchops?
- 7 replies
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- dolichorhynchops
- kansas
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From the album: Woodbine Formation
Leptocleidian Plesiosaur, North TX Cenomanian, Cretaceous Jul, 2023 Between Leptocleididae and Polycotylidae it is unclear which of the two sister families (both within the clade Leptocleidia) this tooth belongs to. This tooth is from marine coastal strata that would have been in near proximity to freshwater sources (see the Woodbine river delta that once existed over Grapevine Lake). Leptocleididae is known up until the Early Albian from freshwater, near shore, and brackish environments. Some possible teeth were documented from the Kem Kem river system which is similarly aged Cenomanian rock. They typically have very gracile teeth similar to this specimen. Polycotylidae is a sister taxon that extends through into much younger deposits and is regarded as a marine group. They arose in the Albian and typically have more robust morphologies, though a basal species could be gracile like this specimen.-
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This partial tooth is sold as Eurycleidus sp. tooth from the Westbury Formation, Penarth Group of Blue Anchor, Somerset, UK. The tooth is 5mm in height. Thoughts on it?
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- identity?
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A tooth I recently pulled from my Woodbine honey hole keeps getting better the more I look at it. I originally thought it was just a really big crocodile tooth of the species Woodbinesuchus byersmauricei, a common find for the site. After cleaning it today, I noticed it was pretty different and am now 90% sure it's a plesiosaur tooth, perhaps from the family Leptocleididae (as opposed to Polycotylidae or Elasmosauridae) and maybe with some real scientific significance! Stay with me here... Crocodile teeth are pretty common for the site. So why do I think this isn't one? Besides being quite large for a croc, the 12 enamel ridges on this specimen vary in shape and are spaced out whereas my crocs typically exhibit tightly spaced, uniform ridges numbering in the many dozens. The ridges on the "plesiosaur" are restricted to the lingual side. My crocs typically have ridges spanning the entire circumference of the crown, though they sometimes peter out on the labial side as well. Another significant difference is in the sigmoidally curved crown which is normal in plesiosaurs and generally not seen in crocs. "Plesiosaur" (L) and Croc (R); Note the significantly different enamel ridge characteristics. "Plesiosaur" and my complete crocs. Quite large relatively speaking. It's crown is about 20 mm long and 6 mm in diameter. Sigmoidal curvature in the crown. I am less sure of the familial identification and beyond. A quick google search for Cenomanian Plesiosaurs revealed an interesting article on freshwater Kem Kem Group Plesiosaurs (https://doi.org/10.1016/j.cretres.2022.105310) from more or less the same time (Woodbine = mid Cenomanian vs. Kem Kem Group = ?Albian-Cenomanian). What initially caught my eye was Fig. 5 where a handful of similar teeth are shown: Fig. 5 from the article. Leptocleididae indet. shed teeth. These are thought to be indeterminate Leptocleididae shed teeth for features shared with my specimen. The authors rule out Polycotylidae on the basis that those teeth are usually more robust. They acknowledge that longer teeth of Polycotylidae do occur, but the striations are finer than Leptocleididae. The authors contrast their teeth (and mine) from Elasmosauridae and Cryptoclididae by stating that those families have straighter teeth with more labio-lingually compressed crowns that create a strong oval cross section. My tooth and those shown above are sub-circular/slightly oval-shaped. Another point to make is that Leptocleididae plesiosaurs are UNKNOWN from deep water environments and are instead suggested to be nearshore specialists (Woodbine is famously nearshore with its crocs, Cretodus semiplicatus, and other nearshore fauna). On the other hand, Polycotylidae, the sister taxon, is a deeper water family. Hard to show a good cross-section because a chunk of root juts out of the bottom making it look more labiolingually compressed than it really is! Implications and Significance: One extremely interesting aspect of plesiosaur ecology that is highlighted by the article is their strong presence in prehistoric freshwater ecosystems. Plesiosaur teeth of the family Leptocleididae are commonly found in the Kem Kem river systems which isn't crazy given they are thought to be nearshore specialists. The authors note that contemporaneous marine deposits have yet to yield Leptocleididae material, which makes one wonder: were they freshwater specialists unable to live in the ocean? I would've been inclined to assume they could survive both fresh and salt given my preconceived notions on plesiosaurs, but there is a lack of hard proof... Until now? If this is what I think it is... this may be the first evidence of Leptocleididae found in a marine deposit contemporaneous with the Kem Kem Group! Just the missing puzzle piece emphasized in the article. Reeling it back in- Keep in mind, a few hours ago I thought this was just a big croc tooth! Also, I don't know much of anything about plesiosaurs since I had never found such material previously. My head is spinning with all these new names. Hopefully you all can provide some clarity on this matter. @pachy-pleuro-whatnot-odon @Jared C @PaleoPastels. Feel free to tag anyone else you know who might have some knowledge on the subject! Pics: ~Thanks for reading~
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- cretaceous
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I bought this tooth on impulse a few days ago. To me it looks like a fully rooted Plesiosaur tooth. It has all the characteristics of being from the Kem Kem Beds aswell. I've not seen any other rooted teeth to compare it to. So, did I score, or did I buy a crocodile tooth?
- 5 replies
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- aquatic reptile
- crocodile
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I forgot I bought these---three small teeth from Wealden. Seller says could be Plesiosaur, and that the one in the larger matrix is most likely a Plesiosaur. If someone could take a look that'd be great. They are all from the Wealden Clay of Hastings. All very small, just under 1 cm. So if plesiosaur, they would be juvenile. The one loose from the matrix has striations. cheers
- 3 replies
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- fish
- plesiosaur
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Grand Opening of the Western KS Fossil Lab - Featuring an Elasmosaur!
KansasFossilHunter posted a topic in Fossil News
Hello all, here is a bit of personal news to share. Back in March of 2021 (on my 25th birthday) I discovered a remarkably complete skeleton of an elasmosaurid plesiosaur in the Smoky Hill Chalk member of western Kansas. These animals are especially rare in this formation and my discovery includes the second known skull found in the state. I have now partnered with a local museum to create a fossil prep lab and exhibit space as I uncover the specimen. The exhibit will be around all summer if you find yourself in the area, and the museum is free of charge. Feel free to reach out ahead of time and I would be happy to give you an in-person tour. Hopefully you can read the text of this article in the local Scott County newspaper. This has been an amazing ride so far and I look forward to sharing more as the project moves ahead!- 10 replies
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- elasmosaur
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