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Hello! I got these two new mosasaur tooth and anybody have ideas what kinds or kind do these belong to? Thank you!

Hello everyone! Yesterday I got a chance to dig in one of New Jersey's famous Cretaceous streams. Once again I planned out a fossilhunt to coincide with my Son's Marching Band competition at Metlife stadium. I have been doing this the past few years as a way to kill two birds with one stone. My wife and I left our house in New York around 5:15 am and arrived at the stream around 10 am. Since my wife has no desire to climb around a stream getting wet and dirty, she left me for a few hours to go shopping. I will say that I had low expectations for this trip. The past few years I have been finding less in the streams. They have become increasingly popular and get searched very hard. I chose to go to a spot that @frankh8147 took me to a few years ago. He told me that in his experience, it produced more reptile fossils then other areas. Indeed i ended up finding my first small complete Mosasaur tooth there the following year, even though i have been hunting these streams since 2006-7? Though that tooth was much smaller then what would come on this dig. So i started off digging in a particular spot that i happen to like. I found a couple small decent sharkteeth right away. I thought to myself that this was a good sign. Well i dug this particular spot for awhile and all i got was small broken bits off sharkteeth for the next hour. So i started randomly picking new spot to dig and things were not looking good. Absolutely nothing. Then i noticed a small gravel bed that was wedged in between some fallen tree branches. I decided to give it a shot. After a few scoops of gravel in the screen I wasn't finding anything. I almost decided to move on, but I had a nagging feeling that I should stay just a little longer. Then after a couple more scoops I looked down a saw a nice mosasaur tooth! I was very excited as this was alot bigger than the first one I found. It has a little tip, and cutting edge damage as well as some missing enamel but from the teeth that I have seen come out of these streams, I am happy with it. After this I decided to dig in this spot longer. I found what I believe to be a beat up crocodile tooth as well as a chunk of rock with gastropod impressions and molds. After this things went dead. I moved around checking other gravel beds and didn't find a scrap of anything except bits of belemnites. I guess this goes to show that even when you think everything has been picked over, sometimes perseverance pays off. Here are some pics

Hi all - found this in Central Texas. It was a surface find in an area mapped as Ozan formation. Thought it was an old railroad spike at first. Is there enough left of it to give a general ID? Kind of looks like some mosasaur vert pics I’ve seen. Any ideas appreciated. Thanks!

Hiya everyone I’m interested in this allocation of mosasaur teeth I know the roots are often faked so any help would be great.

Saw this for sale and was wondering if it was a real fossil?

I recently received some American Mosasaurus (and other) teeth. I would like to identify this, but that is proving difficult. Hopefully we can figure it out together. Tooth number 1, maybe Mosasaurus missouriensis? length: 1.5 centimeters Origin: Tombigbee river, Monroe county, Mississippi, USA Period: Eutaw formation, Cretaceous

Hello!!! On this topic, I would LOVE to see everybody's mosasaur fossils!!!!!!!!!!!!! Here's my Halisaurus (probably) tooth fossil!

Hi! I have a mosasaur teeth and I'm pretty sure it's Halisaurus, but I still need some identification. Thank you! (This picture is the teeth compared to quarter of Canada)

I took off early last Wednesday morning and drove to the North Sulfur River. I hadn't been there since early in the year and wanted to see it again, even though I knew that after such a long dry spell, it might be tough finding much. That thought proved to be right. The stretch of river bed I walked was completely dry, and had obviously seen lots of visitors. I hiked quite a distance, slowing down in all the areas that had been productive in the past, but picked up nothing. So I put on the kneepads, and began searching for smaller fossils. I've always had a tough time hunting NSR for small stuff. There are Hamulus worm tubes everywhere, and I always have to pick up some, but finding anything else small is always hard for me, and Wednesday was no exception. It was slim pickings. But I did have questions about a couple of the things I did find, so I'll post this report. Here are some in situ photos.

This is our collection so far of our favorite finds. All found at Holden beach. Pics consist of shark teeth, mosasaur teeth, horse teeth, sloth tooth, barracuda teeth, stingray teeth, sawfish teeth, enchodus teeth, enchodus jaw fragments, scute, ivory, mouth plate for puffer fish, shark vertebrae, mosasaur vertebrae. We accumulated this in 10 months and they were the best 10 months. My next goal is to start searching creeks. I'd love to dive too. Lots of different adventures to look forward to.

Hi All! I once again come to you for expert opinion and input on a Mosasaur skull/ The anatomy is a bit more accurate, but I cannot say for sure if it is a genuine fossil. Any insights would be much appreciated as far as if this is a composite specimen or looks to be from the same extraction (which I doubt) I am mainly curious if the majority looks authentic or somehow synthesized. Also the seller identified this as a Hainosaurus: the slender skull seems accurate but the teeth running to the end of the snout does not align with popular scientific finding/opinions - gives me reason to believe that the fossils may be authentic but a composite of a few specimens. Would love any and all opinions as I am interested to know if there is any authenticity to this specimen. Thanks for any and all input in advance!! Pictures below:

Hello! I am trying to clean this beautiful mosasaur pictured below, but I am really struggling with some old paleobond thats already been used on it. I have been somewhat successful with using a liberal amount of acetone on the bone, which I scrub in with a toothbrush. This has worked, but there are certain regions where the the glue was used on gypsum crystals and model clay, which has effectively cemented the bones of the lower jaw together. I've also been using a regular paleoarrow. My goal here is to get it as clean as possible, NOT to specifically separate the natural occlusion of the teeth. The plan is to display it at a museum (Also, any wild guesses as to the genus of this pretty lady? I was thinking latoplatecarpus)

I recently saw a globular mosasaur tooth up for sale labelled as Globidens phosphaticus. I am conscious, however, that a number of teeth labelled as Globidens are in fact from Igdamanosaurus, Igdamanosaurus aegypticus in particular, so is this tooth actually a Globidens? Thanks in advance for any guidance Othniel

I have been debating a weighty decision to acquire this mosasaur skull, does this seem authentic to a more experienced eye?

About 3 weeks ago I wrapped up my half year of North TX adventures with one final Kamp Ranch hunt and a beautiful pliosaur tooth to boot. Since then I've made my move five hours south to San Antonio and have endured the first two weeks of dental school. It's been an adjustment, but so far things have gone smoothly I'm happy to say. Although I hadn't done any hunting in that time span, I've been putting in some time towards researching sites in this new section of the state. I guess the symptoms of fossil withdrawal were starting to hit hard yesterday, so I picked a few promising spots from my list and headed out to investigate. Some of the decoration in my new apartment There's a lot of formations I want to explore, but my highest priority was locating the Corsicana in order to find some invertebrate rarities like Codiopsis stephensoni or Dakoticancer australis. The bcfas reports made by @Uncle Siphuncle were a big inspiration and also really useful for figuring out what index fossils to look for. I was working with limited information, so the first spot I visited was chosen more or less because it had a promising look to it. I had already made the short-sighted mistake of sleeping in before the expedition, so the Texas sun was out on full blast with the temps exceeding 100F. At the first exposure, I was introduced to hundreds of Exogyra costata littering the ground which was a good sign. This is a species common in the Maastrichtian, but at the time I wasn't sure if it was necessarily indicative of the Corsicana Fm. Interspersed between these massive shells were much smaller bivalves such as the delicate Plicatula mullicaensis. A lot of the invertebrates I was finding were familiar species, but this new flavor of preservation made every discovery very exciting. Eventually, I stumbled upon a huge rudist! I had never found one so complete. Rudist After stowing that and various other bivalves away, I continued creeping along the exposure when I did a double take at a shiny piece of something. Prior to my move, I had come to terms that I may never find marine reptile material here in South TX, yet sitting right in front of me was the glint of enamel... and not just any enamel. As I knelt closer it became clearer and clearer that this was indeed reptilian! I was so happy but also confused as to how such a thing could be possible. I hadn't even snagged my first shark tooth yet and now this! The cutting edge of a mosasaur tooth Labial and mesial views Lingual and distal views Occlusal view As I fished it from the ground I was in awe by its morphology. The tooth has a strong labiolingual compression that had me thinking "dinosaur" for a split second. On the flattened distal carina are very subtle, but visible serrations. The enamel is extremely thin. On the labial side near to the mesial carina, there is a third well-defined carina that reaches a good ways up the tooth. The crown has a very slight labiolingual curvature reserved to the top of the tooth. Around the circumference are some "concave grooves" running longitudinally. I know mosasaurs were extremely diverse in the Maastrichtian, so there are a ton of possibilities. I did a little bit of searching and think it could maybe be Thalassotian atrox? Hopefully an expert or two can chime in here @pachy-pleuro-whatnot-odon @Praefectus @Jared C @PaleoPastels. (Also mosasaur peeps: keep scrolling down for more mosasaur stuff.) Feel free to tag anyone I missed. By now I had finished this outcrop and already downed 1 of my 2 water bottles. There was another larger exposure in the same site that I wanted to visit while my final bottle could last. As I made my way up, I found similar tumbled bivalves as before. Top L to R: Exogyra costata and Plicatula mullicaensis; Bot L to R: Gyrodes sp. and Trigonia castrovillensis? After some closer searching, I found little speckled pebbles that turned out to finally be some irregular echinoids. I guess the other outcrop didn't expose the layer they were coming from. These little guys were just about everywhere and in super good condition. I thought I had collected a ton of species, but looking at them after cleaning I think I only found the two most common. Still super neat to have Maastrichtian age urchins nonetheless. Top: Hemiaster bexari; Bot: Proraster dalli H. bexari with amazing detail Further up, I found the unmistakable texture of crustacean. It was undeniably Dakoticancer australis, but it had definitely seen better days. The elements split the carapace in half, so I tried my best to wrap it carefully. At some point I'll get to gluing it together and cleaning off the extra matrix. Dakoticancer australis carapace Throughout this entire second part of the hunt, I began to wonder more and more about that mosasaur tooth. Was it a fluke? Did some previous hunter drop a Moroccan specimen? I just had never heard of a mosasaur tooth reported from the Corsicana. As I jumped over a gully, a faint shimmer caught my eye and I began to feel deja vu. I squatted down and tried to rediscover whatever it was before I almost fell on my back. There it was, the biggest mosasaur crown I had ever found! HUGE Mosasaur washed out in the gully! Occlusal and basal views Labial and lingual views Distal view I didn't see any detectable serrations but they could be worn off. The cross-section to this robust tooth is circular with many concave grooves running longitudinally. There is a labiolingual curvature. The tip is missing, but I think it is from feeding damage. I would describe the enamel as moderate in thickness. I think it is "faceted", but I am having trouble telling facets and prism faces apart. Honestly, I don't even have a guess for this tooth . I'm not sure of what mosasaurs are even known to occur in the WIS during this time period. I was waiting for my alarm to wake me up at any second. TWO mosasaur teeth and I had yet to even find a shark tooth. Well, that streak came to an end soon after when I spotted a little Squalicorax lindstromi, Carcharias sp., and aff. Cretalamna sp. cusp in quick succession. Squalicorax lindstromi, Carcharias sp., and aff. Cretalamna sp. Finally, my bottle ran dry. I made a quick and early exit, saving the rest of the place for a future hunt. Hopefully the other formations go this smoothly! Thanks for reading

I have often seen teeth for sale labelled as "Liodon anceps" and on occasion "Mosasaurus anceps". My understanding is that the genus is dubious, and I personally suspect most material labelled as Liodon is actually from a species of Prognathodon of some description, but I'm not sure the exact current state and would appreciate any guidance. Also, should this topic be in the wrong place, my apologies. Thanks in advance for any information Othniel

Hello @pachy-pleuro-whatnot-odon I will tag you here again because I have seen in other posts that you have some knowledge about this. In this big mosasaur jaw plate, as they normally do in Oued Zem, it's covered in white glue. I want to try to take out the white glue layer from the bones without touching the matrix. I have started doing it with a scalpel. But obviously is a lot of work, i have seen in another posts the recommendation of using acetone. If i use a cloth with acetone and just use brush the bones carefully will this work? Is there another way? And it's a good idea to remove the glue even if it's just from the bone? Should I try to apply another varnish like paraloid b-72? O I can leave the bone without anything?

I have this 3 mosasaur teeth form oued zem @pachy-pleuro-whatnot-odon @Praefectus. TOOTH 1: TOOTH 2: TOOTH 3: Just be general shape and size I guess all of them are thalassotitan, 1 being the most obvious one. But why 2 and 3 are more curved, it's because are probably from the back of the jaw? And why 3 doesn't have a mesial carina and the other two yes, also because of the position in the jaw? My general knowledge with thalassotitan is that as you go back in the jaw tooth appear to be more robust. But what about this other characteristics? Thanks!

Hello, everyone! Back in February I was hunting in the North Sulphur River, and I found a few fossils that I am curious about, as well as a broken artifact. If anyone could give me any insights on these pieces, I would be grateful! 1: Pictures 1-3 are of the artifact. 2: Pictures 4-6 are of a tooth. To me, it seems mor conical than a shark tooth, but it does have a flat part underneath. 3: Pictures 7-8 Unknown 4: Pictures 9-11 Unknown 5: Pictures 12-14 Unknown

@jnoun11 @pachy-pleuro-whatnot-odon Could this tooth be stelladens? I have no idea what species it is but the carinae on the side makes me wonder if it's Stelladens

Hello everyone! I'm new here and just a paleontology fan. I love Mosasaurs and I always wanted part of a jaw. I recently saw a post on a website that I'd purchased items before, so it is trusted by me. I found this mosasaur jaw at a very reasonable price but I doubt if it is 100% original or a composite. Size of jaw is 24 x 7 x 2,5 cm. Could someone help me decide whether or not to buy this piece? Thanks in advance (attached all the available photos) MVI_8930.mp4

So, some of y'all know I am obsessed with finding a mosasaur tooth. I found a new spot in Travis County that yielded some nice Eagle Ford stuff (ptychodus, scapanorynchus and ptychotrygon). It's probably a fish tooth, but MAYBE it's a tiny mosasaur?? I have consulted an "expert" (hehehe) we all know and love @Jared C and says 65% mosasaur. What do y'all think?? It's 1/4 inch.

I found what I think are some mosasaur parts in Maryland. The site I was looking is an ~80 MYO marine site in the severn formation in Prince George's county just outside of DC. Here are a few pictures of the best pieces - a big tooth, nice neural spine, and a smaller vert. Am I correct thinking this is mosasaur? If so, potentially either a Prognathodon or a Hoffmanni? These are not in the best state of preservation, but typical for this location.

Hey all! It's good to be back and writing a trip report again - I've certainly been busy this summer. As some of you may recall, my step brother and I found a basal mosasaur in September of 2021. I haven't spoken much about it publicly, but rest assured it hasn't been forgotten! Research and preparation of the specimen is reaching a fever pitch this summer, both of which I'm happy to say I'm actively involved in. The reason for the silence has been to avoid leaking details that might scoop our paper. However... This year at A&M I'm participating in a grant for science communication, and because of this I have permission to show a little more about our animal now, since it's research is the subject of my internship with SMU right now. So! What's been happening with the mosasaur since the last trip report of it (below)? Here is the very abbreviated continuation... January 2022: On a whim, I decided to return to the site - just in case we missed anything. It felt almost foolish to hope for more, considering we already had a significant amount of skull material and a few verts. I came in with no expectations. I did not take long to see more of the animal. I started working several feet away from the pit we had dug, with the idea to work inwards, but instead almost immediately found the terminal vertebrae of the tail.... in near perfect articulation Below: Four vertebrae with haemal arches locked together (several are shrouded by a white layer of paraloid b-72) Realizing what I had, I strenuously chopped a trench out around the block with three chisels and a rock hammer, then somehow lifted the entire thing and walked back the distance to my car. Here it sat below: One year later, these terminal verts were prepped. I think they are spectacular. Let's zoom back to the moment though... I realized we now had both ends of the animal - the back of the skull from September, and the end of the tail from today. Where was the middle? I called Christian (my step brother) and let him know what I found, telling him that we had to attack the site together again to see what more there could be. The following weekend we did just that, expanding our pit until eventually were were met with this sight: This was huge, and we realized we had potential for the entire animal being buried here now. I called up the researchers at SMU i had just connected with, and was instructed to glue the block back into place until a more formal excavation could carry out. Months pass. Multiple attempts at resuming the excavation professionally are made, each falling flat due to unlucky weather or last minute personal commitments. This string of bad luck continued until one day in October... October 2022 Realizing we might not reach years end with an excavation, the folks at SMU suggested I borrow some power tools for the weekend and conduct one on our own. Christian unfortunately couldn't make it, since he had just moved to Washington. Despite his absence, I constructed the best team I could think of.. @JohnJ, @LSCHNELLE, and my dad. For an entire day we happily slaved. I took absolute loads of photos and videos, to avoid the same configuration confusions the SMU folks and I have encountered already. John's experience is the stuff of folk legends, and he has performed many excavations on his own finds before, while Lee practically has Eagle Ford shale running through his veins. Their presence proved to be invaluable and I will never be able to thank them enough. It was an epic hail-mary to undertake in a single day, but we finally extracted the bulk of the animal in several large blocks. I still can't share photos of diagnostic bones, but here are some images from the day below: From left: My dad, John, and I making a trench. Below: An unusual symphyseal ptychodus tooth found while trenching: As the day neared an end, our pace picked up - we were on a serious time crunch and had to make it out of the site soon. With 30 minutes to spare, we all together lifted one of the final slabs and were met with a sight that can hardly be described with words... Lying before us was a pair of dentaries, in amazing condition apart from where the slab split them. Fortunately, the damage is not irreversible - the part and counter-part fit back together absolutely perfectly. Part and counter-part, below: The site, after the end of a long day. Four exhausted, fulfilled men walked away from here. Fast forward to this spring, were I got accepted in a science communication grant program, allowing me to take the research of this mosasaur to new levels with my mentor at SMU. By the end of the summer, we strive to have an abstract for our paper. The work is building to a breakneck pace, but I love and it's what I hoped for... until next time!