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Hi guys I have these 3 similiar mosasaur teeth that I was wondering if it was possible to identify, are they prognathodon thanks! 1. 2. 3.

Hi all, me again, I wanted to share a closeup of the bone fragments that I found in Ramanessin to see if I could get them ID'd further since I know how the brook tends to make fake fossil bones i want to check that the ones I found are real fossil bone 1) the big one, i think it might be a cretaceous turtle shell, it passed the burn, and the lick test. 1A) I believe these are also enchodus jaw fragments. 2) 2A)

Stick around, this one's a read but I'll try to make it fun. So, I have been to big brook last year, and While I enjoyed it, since I went in early feb, the ground was frozen which prevented me from finding much, as the brook was stingy that day. Nonetheless I decided to try my luck with Ramanessin as i heard good things about it. Because none of my family or friends could be bothered, I decided to take a day off work and drive 4 hours to the area and spend the night so I could get the most out of the location. what follows is the result of 2 days straight of fossil hunting. which I will try to tell the story of in order. Day 1 the scoop I arrive at the site a little past 12, choosing to waste no time, I make my way down to the brook and start to sift the gravel. as opposed to when I went to big brook in winter, Ramanessin was generous with her gifts. I found 4 teeth in the first scoop. I took this time to make my way up the stream cutting back and forth sifting every gravel pile I could find. my personal method is to put no more than 5 scoops into the sifter. that was the way to guarantee I got at least something out of it. it was during one of these sifts that I found the curious reptile tooth here. I will be doing a separate fossil id post later of the teeth and bones. but this was one that i knew was something special. I also found this really nice cross section of ammonite. the sutures were beginning to separate, any longer and they would have come undone. It was also this trip that I found these chunks of bone, now I know the brooks have this nasty habit of producing concretions and discoloring modern bones to Look like fossils, but i am 80 percent sure that I found some genuine articles here. Taking the ###### at some point in this day, I decided I needed to pee. so, to avoid being spotted I ducked into a small mouth of a tributary to do my business. while I was wrapping up, something caught my eye, something I couldn't believe. the outline of the Biggest, and likely one of the best lateral goblin shark teeth I have ever found. I was absolutely giddy. after picking it up and doing a little field prep washing it off in the water it was easily 1.8 in. and as the story usually goes as I am looking in this little alcove of gravel, I see the root of yet Another massive goblin tooth root, this time submerged in the dirt. I chanted to myself "please be whole" as I carefully brushed off the tooth to reveal a gloriously intact fossil. easily one of the best and most fortuitous pee breaks i have ever had! It was on my way back that I decided to put the trash bag I brought to good use and pick up the garbage I saw on the way. I'm not going to lie here, I have found it pretty shameful how many shards of glass and cans I would find in this place. But I took it upon myself to fill the shopping bag as best I could. I didn't want to be stuck out in the dark, so I hurried back to the car and dropped the trash in the nearest bin. Lodging back at the motel, I spent the evening cleaning off my newfound loot. I took this time to carefully superglue the ammonite chunk so that I wouldn't lose it. I took one of the plastic cups in the hotel room and cleaned my fossils with it. Day 2 lost sifter After breakfast, I returned to try my luck again, but when I opened the trunk of my car I was met with the absence of my sifter. I t was then that it dawned on me that when I came back to the car I had only my shovel and my trash bag in hand, tricking my brain into thinking i had everything! realizing it was probably lost, I went back to the brook to try my luck surface collecting. The region had received some rain overnight and into the afternoon, and although it wasn't flooding, the water was considerably higher than last time. i was almost discouraged until i noticed something bright blue on the opposite side of the brook... it was my sifter. right where i left it on the top of the overbank. I was so elated I was laughing at my turn of luck. "Hang On! I'm comin!" I yelled at the inanimate object. there was a fallen tree 4 meters from the sifter, so in my full wading gear, I straddled the trunk and shimmied over to the other side and retrieved it. mosasaur it was now that I decided to make my way upstream and sift past the areas that I had already hit. I noticed a few tracks of bootprints here and there. I was initially discouraged by the fact that whoever it was got further than I was hoping they did. but that all went away when as I was sifting through a pile of gravel, I noticed a sheen of blackish enamel. picking it up I realized this was likely yet Another reptile tooth, and the chances that I bagged a mosasaur had effectively doubled. (did I mention yet that this was my 1st time to Ramanessin?) check your spoils as I made my way upstream, I came across the ruins of some old concrete structure in the middle of the brook, either a dam or a bridge foundation of some sort. to my right I saw a large spoil pile. out of curiosity, I started to look at it trying to see if there was anything the previous person missed. and boy was there. I found another huge lateral goblin, and (Pictured separately) a massive sawfish rostral tooth. it was crazy to me thinking about missing not one, but Two easily trip maker sized teeth in your spoil pile. let this serve as a lesson to newbies, to double check spoil piles you see, just because you never know what the last guy missed! crow island I waded and sifted my way upstream past the concrete structure, tactically using my shovel as a sounding stick of sorts and pointing my toes in the direction of the current so as not to lose footing. I stopped just past a footbridge where there was a little island of gravel that had accumulated over the weeks. as I scanned the shore, I saw another trip maker: an absolutely huge Squalicorax prisodontus tooth. it is at this point that I notice that I want alone, there was a group of boys that went bicycling overhead. now, all through the day I was completely alone, talking to myself about the stuff i was finding and being a general silly guy. I'm sure that if anyone came up to me while I was like this, they'd think I was insane. I took this brief encounter as my sign to start heading back to the car. the wade back the wade back I made it a resolution to not sift bit surface collect only. the thing is, that in the hours between when I got there and now, it had stopped raining. and when the rain stopped the waters started to recede after an hour or two. So here I was, walking back to the car past effectively virgin shoreline, with only an hour of sunlight left. I was delaying myself left and right with tooth after tooth that I would find on the shorelines. some being decent sized in their own right! after I returned home, I spent the remaining hours of my sanity cleaning and sorting the finds of the day. this is the total finds for day 2. Aftermath below is the combined total of fossils. of the identifiable items I found approximately 234 goodies over those 2 days. my display case for Cretaceous NJ was looking a little sparse before, but now its looking a little fuller as I am writing this. if you notice any special things in the pictures I missed, please let me know, I love educating myself on these things.

I was finally able to take a trip to the NSR in 2023. We had a good 11 foot rise so I was optimistic. My whole goal this trip was to find a point, I couldn't find one to save my life, I however did find a few cool fossils. I don't know if i just don't have the eye for it or if i am just looking in the wrong places. The last two pictures are of an item im not sure about anyone have an idea? Possibly a set of fused vertebrae with the two end ones broken off? The haul The vert The mosasaur thing The in-situ And the I don't know what this is

Hello, I bought a Mosasaur Jaw fragment from Morocco at a local expo, at first sight I thought that maybe it's prognathodon sp. but I would like to know your opinion. The jaw has 3 teeth that I could check that belong 100% to the jaw and the other at least seemed to have the same morphology but it's not possible to know if the belogned to the jaw or not. Any way, knowing this I thought the price was fair so I bought it. I have marked with red the teeth that for sure belong to the jaw so it can help with the ID. If it helps with the ID, the teeth have 2 edges, one on each side. On the other hand, do you think that the other teeth has the same morphology and can belong to the same species or even to this specimen? I know that I will never be able to know 100% sure if that's the case. Here is a close up of the 2 big teeth that belong to the jaw:

I think North Texans will relate when I say that now and then, the urge to take a drive out to the NSR and spend the day hunting some Campanian gravel bars can spontaneously take complete hold. I had one of those moments just after the series of heavy rains and powerful winds our region encountered some days ago. Previously, my luck with weather at the NSR had been rather poor. Each time, the temps were either nearing a hundred degrees or only just above freezing, making a full on adventure crossing muddy waters and crawling atop unshaded gravel beds too much to handle. I had yet to experience a proper adventure at this historic site, so I decided that this week would be the one where I changed that. Luckily, my friends @PaleoPastels(Lari) and Cole where kind enough to invite me out to their special spot along the river. After waking up bright and early, I got in my car and followed the rising sun. After jumping out of our vehicles and exchanging brief greetings, we quickly slid our way down to the shale bed and beelined for the first bar. Cole has a bit of an aversion for water, so he stuck around at the entrance for most of the day while Lari and I got our clothes wet hopping from bar to bar. The weather and water temp were absolutely perfect, and the lack of footprints assured us it would be a productive day. It's not often you beat the crowd to a place as popular as this! Although I maintained measured expectations coming in, the sheer variety of strange and interesting fossils/artifacts that are known to come from this area kept me on my toes from the outset. When we arrived to the first bar, we started off strong, picking up a variety of shark teeth. Lari had an eye for them, immediately spotting a few super big Scapanorhynchus texanus, a staple of the Ozan Formation. Despite my protests, she was very generous in donating a few to me due to my limited NSR collection . Finally one I spotted myself! Scapanorhynchus texanus Scapanorhynchus texanus of the day. Some may be Carcharias samhammeri as I am still working on differentiating the two. In between crawling the gravel, I did some sifting which yielded a few interesting specimens including Squalicorax kaupi, Cretalamna sarcoportheta, Carcharias samhammeri, and a vole tooth which I will ignorantly assume to be Pleistocene in age. Cretalamna sarcoportheta, Squalicroax kaupi, and Carcharias samhammeri Sifting also yielded a plethora of shark vertebrae and I was fortunate enough to come across a beautiful spiral shark coprolite. I found one solitary coral which I assume is Trochocyathus sp. Shark verts, shark coprolite, and Trochocyathus sp. As I scanned the gravel looking to spot a complete Cretalamna, I was instead met with the first mosasaur tooth of the day! It was mostly in tact and showed some nice detail. I was relieved to know the entire trip was already made, and I could spend the rest of my time playing with house money. The only other mosasaur tooth previously in my collection has a beat up crown, so this new specimen certainly complements it. Don't know much about mosasaur genera in the NSR, but I will go with Tylosaurus proriger for now. Throughout the day, we also found tons of very large Enchodus fangs and jaw sections. I'm so used to finding these teeth in their miniature forms as I sift for micros, I almost forgot how big they could get. Lari did good with spotting the Ischyrhiza mira rostral teeth and quickly built up a small collection. She was nice enough to give a large one to me. Top: Fused fish vert and Pachyrhizodus tooth. Bottom: Enchodus jaw section and large fangs. Ischyrhiza mira By now we had hopped a couple of gravel bars and there was still plenty ways to go. It took me longer than it should have, but reaching the third bar finally brought me a large tumbled mosasaur vertebra. Not far from it, there was a section of finer gravel. Used to the routine, I once again got close to the ground and began scanning every pebble. After tossing the millionth shrapnel of shark tooth, I finally locked eyes with the most perfect mosasaur tooth I had ever seen. As I picked it up, I could tell something wasn't right, however. Of course the best side was on full display, but the rest of the tooth was cleaved cleanly off. Oh well, at least it'll look nice in pictures. Not long after, I found a second mosasaur tooth that was decently complete and hooked albeit tiny. Two nicest mosie verts. A slice of an exquisitely preserved mosasaur crown. The next oddball find came awhile later. My initial impression was that it might have been a segment of a Xiphactinus tooth, but the curvature suddenly ended along one of the edges of it. At this sudden end, there were two columns of small protrusions running longitudinally. I was debating on throwing it out, but my history of carelessly tossing neat finds convinced me to play it safe and take it home for identification. I'm glad I did because after the hunt, I immediately googled my hunch and it seems to be correct. This is a fragment of a hybodont spine! I wish I could pin down a more specific ID, but the info on them seems limited. I will say that, out of Moss Creek, I had found a tooth belonging to Lonchidion babulskii last year which could be the culprit. Quite an uncommon find for the NSR! Wondering if any shark experts here might have any ideas @ThePhysicist@Al Dente. Hybodont fin spine. Lonchidion babulskii is a candidate. By the penultimate gravel bar, I thought the best finds had surely been made. All day Lari had been talking about how this was THE spot to find Globidens teeth and how every visit she would find at least one fragment. Well, the walkable land was starting to run out and she expressed how disappointing it would be not to come across one that day. I find Globidens to be really interesting, but I think of it as one of those finds I would never expect to make on any given hunt. For me, not finding one would not define the day as a let down. As I was beginning to form those thoughts into words, I reached down to pick up a circular fragment of a tooth with a peculiar texture. Finding the right angle of light soon revealed the undoubted best find of the day: The top of a Globidens sp. crushing tooth! The whole day I had been hallucinating "finding" Ptychodus teeth. Funnily enough, this may very well be the tooth that ended their supremacy as shell crushers of the WIS. Seems too coincidental that Globidens suddenly appears right around the last occurrence of Ptychodus. I wonder if they directly competed Ptychodus out of existence or if Ptychodus went extinct on its own and mosasaurs simply filled in the niche . I don't think the Globidens of the Ozan Formation has been formally described yet. Globidens sp. Mosasaur teeth of the day! Despite having hunted for over a year in the creeks of Austin, I am surprisingly bad at spotting artifacts. Throughout the span of the day, the both of us had found a few chert flakes, but no sign of anything more even as I was trying to make a conscious effort to spot one. On the same bar as where the Globidens sp. was found, I noticed a worked edge of stone so big even someone as archaeologically blind as me could never miss it. Without an ounce of self control, I yanked it from the sand before I could finish yelling the word "arrowhead"! I seriously need to work on milking the moment . I did a little bit of searching online later and found that the point is likely a Darl or Hoxie. Both put its age in the thousands of years! Darl or Hoxie point. It measures 8.5 cm in length. On the way back, we kept our eyes peeled for anything we may have missed. I was sifting random spots of gravel, but not having the most luck. Lari casually handed me rock with a pearly white exterior and triangular shape. It was the most textbook mastodon I had ever seen, but she wasn't very impressed with it. She told me she had many of these already and that nonmarine fossils didn't interest her. I won't say I understand her terrestrial prejudice, but I will withhold my complaints since it meant I had acquired my first significant chunk of proboscidean . Mastodon enamel, mammoth enamel, and vole tooth. We finally reached Cole at the entrance. In our absence he had wondered off the other way and found a neat spider to pique his entomology interests and pocketed a few fossils. We managed to make it out by the mid afternoon, but I was so exhausted and content, I couldn't bother checking out any other spots along the river. The spoils of the hunt were amazing, but most of all I was happy to finally experience a classic hunt on the NSR as I had seen so many post about before. Doing it with a couple of friends made the adventure even better! Sadly this place has got not much time remaining, so those of you who have stumbled upon this post, maybe take it as a sign to give this historic spot one last go before the opportunity floats away. Thanks for reading!

Hi, I have a hard time with the mosasaur tooth Id. Is there some post in this forum from some of the mosasaur experts about the main ways to ID the teeth? Thanks!

Hello everyone! I just got some but I have no idea about it.The only information that seller gave me is those mosasaur bones from Ozan fm, Texas. So I will post some photos of them for you to have a look if you familiar with them and can tell the ID. here are they: Bone 1: Bone 2: Thank you!

Hello, i have some teeth i brought a 12 years ago. I am not sure which species is it. G. alabamaensis ? Age: Upper Cretaceous Location: USA (Forgot the actual site) Size: 8-10mm Thanks

Anyway to identify some isolated mosasaur teeth? I got these from one of those little fossil kits when I was a kid. I'm assuming they're from Morocco.

Hi. Hopefully wiser this time. Could this tooth be Eremiasaurus heterodontus tooth? Its small, less than 2cm. Thank you for your answers.

A few of my favorite, smaller, non-dinosaurian Campanian (Cretaceous) finds from last fall on the east coast. Enchodus petrosus fang, Xiphactinus vetus teeth, plesiosaur teeth, mosasaur teeth, Deinosuchus rugosus teeth and osteoderms, Ischyrhiza mira rostral spines and vertebra (I think it’s a vert to I. mira anyways), Cretolamna appendiculata teeth, Archaeolamna kopingensis teeth, Serratolamna serrata tooth, Trionyx spp. carapace plate, Flemingostrea shell, Hybodont cephalic clasper and dorsal spines and teeth, Scapanorhynchus texanus teeth, and Squalicorax pristodontus and kaupi teeth.

I found this in big brook in Monmouth NJ some time ago. Was going back through my collection and found it again. I initially thought it was a partial enchodus jaw but I have a few of them and it looks nothing like it.. then I saw the end and thought it could be a rooted mosasaur. What do you all think?

Hi all, it's been a minute since I've written a report and I think I'm due To start: This last January I got to be a part of two special discoveries in the marine reptile realm. Though not made directly by me, I'm still glad I got to be there. I'll detail them below: Early January: Last summer, I spent two weeks in North Dakota on the Hell Creek formation, and made some lifelong friends. Two of them (Harry and Piper) arranged a trip down from North Dakota and Florida, respectively, upon the discovery of cheap flight tickets, with the intent of catching up and taking a tour of the Texas Cretaceous. Our weekend was spent well - many laughs, drinks, mishaps (like my catalytic converter getting stolen ), long drives admiring the city lights in my parent's car that they graciously lended me for the remainder of the weekend, and of course....plenty of fossils. The first day was spent gravel hunting - not much came to show from it save for a well preserved (for these creeks) mosasaur vertebra. I was of course very happy to see this, as verts in this watershed are a rarity. The next two days were devoted to the Eagle Ford - one site being a bust on stuff that's worth flying down for - but the next site which we attacked on Sunday produced the best find of the trip. This site is my "if we get skunked, it's our last resort" site - there's always something wonderful to be seen there, and when you have a site like that in your back pocket, it's not something to pillage - best kept for special occasions like this! My hope was that I could get Piper and Harry hooked on some beautifully preserved Cretoxyrhina and Ptychodus, and, if we were lucky.... a Pliosaur tooth. What Piper actually ended up finding was so rare it wasn't even one of my list of realistic goals for seeing that day... We arrived at the site, and while I tried to isolate the elusive fossiliferous layer, I put them on some sections that still had some promise. For both of them, all of their prior field experience is in the North Dakota badlands - so even the act of tapping actual rock and flipping slabs made for an enjoyable and novel approach. After 20 minutes or so, I eventually found the sweet spot - that thin, ephemeral, densely packed layer was underwater. Making a huge mess (mud and water everywhere ), I pulled out some great slabs and passed them out to be picked at, and then picking at some of my own. Here's a fun selection of finds prior to "the big one" Above: Cretoxyrhina mantelli tooth from Piper in the less rich layers. She found this nearly immediately! A gorgeous Ptychodus occidentalis that I was happy to see A Protosphyraena sp. I was happy to see as well. Largely complete teeth from this taxon are not too common for me. a PERFECT Squalicorax falcatus. It may be a common shark, but I love finding a beacon that can just define an entire species in my collection. I have some other smaller, perfect condition teeth for S. falcatus, but they take on a more posterior position in the mouth. For now, this tooth is my Squalicorax pride and joy. Some microteeth showed themselves as well, like this one above. With that size it's hard for me to make a judgment on genus here. Finally, one rock had a trip-maker. I handed a slab to Piper, turned my back to continue "mining", and immediately hear a casual "I think this is something cool". Laying loosly on the slab, ready to come flying off with the slightest disturbance, was THIS: A Coniasaur jaw! That's code for "stupid rare". Here is the specimen under better lighting. Those familiar with North American Coniasaurs may notice something unusual - that it's definitely not the North American Coniasaurus crassidens that most Coniasaur finds here get thrown into. With what's described, that leaves the more conventionally European C. gracilodens, and that doesn't look like a definitive match to me either. For Coniasaurs, it wouldn't be saying anything very extraordinary, as Coniasaur taxonomy has not been properly recorded, but this might belong to one of those coniasaur morphologies floating around without a description. This specimen needs to be looked at under a microscope before a definitive assessment is made though. Here's a graphic I composed for it (note none of the pictures are mine though). On the left (A, B, and C) is Coniasaurus gracilodens, on the right (E and F) is Coniasaurus crassidens. Notice that Coniasaur paleoart is even rarer than the actual animal, so I used art of some other Dolichosaur. It does a good job of representing what Coniasaurus would have looked like anyway. It was a wonderful find to wrap a wonderful weekend, and this fossil will probably make its way to SMU next. If the folks there don't find it useful for the Coniasaur research they have rolling, it'll make its way back to Florida with Piper. Fast forward a week: After one weekend spent fossil hunting a hard, another good one was on the way. This time, my weekend would be devoted to exploring the cenomanian Plesiosaur digsite from July, in search of more bone. My dig partner for the weekend was George, who I met briefly at SMU once by chance, where he was asking around on how to get involved. Unfortunately @Ptychodus04, who (with Joe) I found the specimen with in July, couldn't make it out this time. With his current prep project of a one of a kind green river bird, I can't blame him . It was suggested I show George the ropes the next time I go to my plesiosaur digsite. That might have been a little cruel and unusual, considering how difficult and dangerous that site is, but as you'll soon see, it was well worth it - but not for the reasons you'd expect. We spent two days on the site - one half day digging away overburden, followed by a night in a smoky motel-8, and then the next day more tediously removing small chunks of matrix from the cavity at the bone level. In short, we moved maybe 8 inches further into the cavity, with no bone spotted. As I was hunched over, chipping away, George moved further to the right by some feet to explore for a wayward flipper. This was his first field experience, and he crushed it, breezing through the first slabs as he moved in. It did not take long until he let out a triumphant yell. Thankful to stand up, I came over to take a peek at what he had found in his slab, and went completely silent. It seemed to me that we were looking at a mosasaur tooth... As a reminder, this is (middle?) cenomanian strata - several million years older than the oldest american mosasaurs. Before we call it though, Polcyn is going to evaluate and prep the tooth personally. But, from photos and my own pre-prep observations, we're both optimistic that it's mosasaur. Next up will be some sampling of bentonite layers for a more precise date. Here are some photos: With that find, the day was a success, even though we didn't find more of the Plesiosaur. George and I turned around and started heading home. We had time, so I wanted to make a pit stop to explore a different creek which seemed to have interesting geology after I cross referenced google and geological maps. Fortunately, it didn't take along to find a perfect access point, and from there it didn't take long to find a large shale exposure. This was in the upper eagle ford formation, close to the contact with the Austin chalk, so I was hoping to find the legendary Kamp Ranch shark tooth lenses. We got stopped short by mud and private property though, and we were anyway making slow progress because the geology up until that point was just too interesting. So, we settled down and begin moving into a hill. Much to my surprise, we began finding in abundance one of the last fossils I expect to see in the eagle ford - ammonites. The average ammonite we'd see looked like this - detailed but otherwise in poor condition: Some other good specimens began appearing, thought still flattened: After 30 minutes, we eventually came across a a partially 3D specimen: This was a welcome change from being hunched over for hours in hard rock searching for a humongous marine reptile. This day, we got the best of both worlds! For now, I'm stuck between Colignoniceras woolgari or Prionocyclus sp. as Prionocyclus hyatti also looks convincing. Suggestions are welcome Those were the January highlights, but I would like to take a moment on a February find as well- my first Saleniid ever. Other male fossil hunters might relate to me with this one. When you're this hopelessly obsessed with the hobby, your brain can come up with few date ideas more appropriate than dragging a pretty girl through some muddy creek to look for sea urchins with you. In retrospect, always a terrible idea, but if she sticks it out you found the one Fortunately we didn't get skunked, so she didn't think I was crazy - because we actually made a good find I wasn't expecting. This site is the legendary Comanche Peak shale micro site that I've praised on a few trip reports before. Between my step brother and I, two Tetragramma (one of them gargantuan) have been found, and dozens of Heteraster - but all in the tiny shale section. The shales are encased in limestone, which I noted to be decidedly more barren in previous visits. But, this time - I almost immediately noticed a wonderful geometric pattern in the limestone roof above me: BOOM! I was definitely ecstatic about this. Careful chiseling got it out safely, in a condition to be prepped at home: Pre-prep, I'm tentatively assigning it to Leptosalenia mexicana. For the prep, I think I'll have to use acid for the first time, painting the exposed urchin in paraloid and dunking the rest in vinegar for a day, water for a day, and then repeating. If anyone has a tip or trick that they like for acid prepping urchins, I'm all ears On a total side note, we made an even rarer discovery soon after - though not a fossil. After moving on from the sea urchin spot, we found a newly made walkway that ran by the most perfect, untouched climbing boulder I have ever seen. For anyone reading this who also boulders, you would agree that boulders that have flat landings, excellent top-outs, and solid holds, all while being aesthetically beautiful... are very rare. To find one that is easily accessible and undiscovered by other climbers? That's like finding a unicorn. Here's the unicorn in quesiton: The day after I threw myself at this boulder for a few hours, cleaning the holds and finding routes. I had a dream about it for two nights in a row And so, that was my month. I've been busy, but thankfully not nearly as busy as last semester, so many weekends still give me time to get back out in the field. I have a killer Coniacian spot in mind I want to explore soon, so hopefully I'll be back with a success story. Hope you all get a chance to kick it in the field soon!

Found this unusual broken bone in Pierre shale with a vert right by it. Where on the mosasaur body might it have come from? Thanks!

Hi. I got this random mosasaur tooth in matrix. It has this unsmooth texture, so I assume it could be an fake root. Also I see two damaged white marks. I am more interested about the crown, but I think its still good to know so I can notify about it if needed. Thank you for your answers.

Hola, necesito ayuda para poder determinar la especie de este fósil, procede del sur de Marruecos y está encajado en una pieza de 155cmx 113cm, sabemos que petenece a la familia Mosasauridae pero tenemos dudas con respecto al género y si es un adulto o una cría. (Translation added and post moved...) Hello, I would appreciate your help to identify a fossil, it comes from southern Morocco and is embedded in a bed of clay, its measurements are 155cmx113. We've been told it's a Mosasaurus, but we have some doubts about the genus.

Is it possible to identify different marine reptiles by bone structure of ribs? I have got one for a short time to include in a paper. It is a rib, marine environment. I would assume it is a marine reptile or perhaps a huge fish (like the Xiph). Comes from upper cretaceous, Santonian. Lenght is approx. 9 cm, looks not compressed, other dimension is 3 2,5x1 cm. Brown bone substance with good internal structure. What do you think? Perhaps it is possible to identify, this would help. thanks

Hello, everyone! I went hunting along the North Sulphur River yesterday (before today’s nasty weather), and I found some fossils and what I am almost positive is an artifact. Could someone please help with IDs, if possible? Pictures #1 and #2 are of the same bone; I found the circular striations in the 2nd picture particularly intriguing. #7 (the artifact) is broken at the base and is fairly thick at the point where it is broken.

Found this big bone with a mosasaur vertebrae near by in Pierre shale. This is the biggest mosasaur single bone I've found. Is poorly preserved and started to weather. Is there enough to tell if it's femur or humerus? I compared it with other mosasaur but couldn't find any that were this round. What species might it be? Thanks

Hi. New collector here and first time here at the forum. Im trying to collect some mosasaur teeth and realized that Im unable to recocnize Eremiasaurus heterodontus tooth. My first thoughts with this tooth was that its an prognathadon kind tooth (Thalassotitan), but I could use some help so I know was my first thoughts wrong and how I recognize the Eremiasaurus tooth in the future? Never seen any and don't know what too look for. Tooth is 3cm. Quite smooth cutting edge on a front. Moroccon. Thanks for the help.