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Found this hiking in a canyon in Colorado

Hi. I just like some opinions regarding this Keichousaurus that I’m considering aquiring. It looks good to me apart from some instability in the plate. A second plate has been attached at the bottom for extra stability. Thanks for your help!

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?

Hello friends. Please help. This vert came from the Pleistocent Terrace deposits in Austin Co., Texas. It looks to me like it's reptilian but I can't find a match. Your thoughts would be appreciated.

Hey everyone. I found this piece of bone at a late Cretaceous stream in New Jersey. I am hopeful this specimen, though incomplete could be identifiable. I've showed it to several experts and dinosaur seems to be the overall consensus so far. Some people I showed it to believe it is most likely theropod but others are skeptical. I'd love to hear more opinions on this specimen. Thank you in advance!

Hi all My son and I found this large bone in Orange County, Florida. There is a socket at one end. At first, we thought it was a scapula; however, after more searching, we are stumped. Any help IDing it is greatly appreciated. Thanks!

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~

Hello everyone! I'll start with etiquette questions. To be honest, I like to collect things that I think look interesting. I was at an estate sale and bought a small collection of fossils, arrowheads, stone tools, bones, and other things that I cant even begin to speculate as to what they are. I am definitely now addicted to this and plan on dedicating several hours a day for my new found love. With that said, here are my questions and another item for identification. 1. How many postings are appropriate per day for identification without becoming annoying? 2. Is there an app anyone is aware of that I can simply upload an image and get accurate results? 3. What would be the best way to share multiple, dozens of pictures in one large group, if possible to share with all the members? And finally, another set of pictures for identification. To me, this looks like a finger from gorilla. There are markings on the bag it was in that I can make out that says Nebraska and Reptile. I don't know if that is accurate, but please enjoy the photos and any identification would be much appreciated. Thanks! Dan

Hello, I wanted to ask about a couple fossils from the Hastings subgroup, Wealden supergroup, Wealden of Sussex. One is a tooth labeled Baryonyx and measures 0.4 cm. At that size I'm assuming this is just a tooth tip or from a juvenile? The other is a "theropod" claw measuring 0.7 cm. It's very tiny and has an odd protrusion on the underside towards the articulating end, which reminds me more of some bird claw cores. Is this even dinosaurian?

My brother found this tooth years ago at big brook. It looks reptilian to me, and seems to have the root preserved as well.

Having just gone thru the effort of identifying a Chelonia Sea Turtle Humerus, but I looked at a Humerus for a Giant Tortoise and it did not seem to match.. So others might have seen this previously. Seems distinctive enough... @digit