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I found this little piece of jawbone that has some curvature to it that initially caught my eye and upon closer examination it appears to have a tooth root in one of the sockets. My first guess is cetacean of some kind. Is that right, or am I way off? I'm not sure if it's marine or not. Thanks in advance!

Is this teeth or not. Been racking my brain since my trip to lym regis

Hi everyone, this is my first post on here. This specimen was labelled as a 'dinosaur jaw bone' and it was found in the Hell Creek Formation near Glendive, Montana. It is about 27 mm long. It does seem to me it belongs to a reptile of some sort but I haven't been able to find anything on the internet to identify it with any more specificity so I'd really appreciate your expertise in identifying it. Thanks everyone!

Sorry for bother again. May I know…What kind of creature does this jaw belong to, please? Thank you so much

Good morning. A seller from Morocco sent me pictures of Spinosaurus. But I have no idea with it. May I get some advice from you, please? Thank you

Hi again. May I have the opinions of this jaw also? Thank you so much.

This is a creek find from SW, MS. It was found amongst other types of teeth. It appears a cap (enamel) is missing from one tooth. Can anyone please identify it. Help is appreciated. Thanks in return.

https://www.cbc.ca/news/science/dire-wolf-1.6802544

Hello everyone! I'm here seeking for help with the ID of this Mosasaurus jaw section I recently bought. It comes from Ouled Abdoun, Morocco. I don't know much more, and I'm just becoming crazy reading that there are more than 18 Mosasaurus species from Morocco The seller didn't commented on the ID, but he said it may be an Eremiasaurus. What do you think? Also, do you think that the bone on the bottom left is the left side of the jaw? Thanks in advance!

Hello, Could I get an ID for this little premaxillary/nasal jaw piece? It's from the Permian-aged Ryan Formation near Waurika, Oklahoma, USA. It measures a little over 1 cm including the tooth, and seems to be from the right maxilla. I believe it contains the anterior border of the nasal opening. The seller says it could be from a Secodontasaurus or undescribed reptile.

Hi, just wanted to double check if the ID of this mosasaur jaws is correct and if there is any composite stuff (at least from may point of view I can't see any). This first in theory it's a Eremiasaurus heterodontus from Oued Zem. The second one it's a Prognathodon curii also from the same place. Tagging @Praefectus and @pachy-pleuro-whatnot-odon. Thanks guys!!

Hi, Was just wondering if this is really a Spinosaur jaw fragment because most I see labelled as that turn out to be Croc instead. It is a small fragment at 6.5cm in length and comes from the Kem Kem. Thanks!

The genus Centrophorus sp. represents a very interesting group of sharks within the Centrophoridae (Squaliformes), which can be found up to about 3000m below the sea surface. The largest representatives of this group reach a body length of 170cm. Not only because the sharks of this group are among my favorite sharks, but also because fossil finds of this species are extremely rare, I decided to write about this topic and compare fossil and recent Centrophorus species with each other, as well as collect the known information about them. The modern genus Centrophorus has been repeatedly revised, rewritten, rearranged, species synonymized and added again in recent years, which makes it difficult to keep an overview. According to my count, the genus currently includes a maximum of 17 described species and is distributed in all deep-sea regions worldwide. The 17 known modern Centrophorus species are: C. acus (synonymous with C. granulosus according to White 2013, but still often considered independent), C. atromarginatus, C. granulosus, C. harrissoni, C. isodon, C. lesliei, C. longipinnis, C. lusitanicus (probably a cluster of different species), C. machiquensis (doubtful), C. moluccensis, C. niaukang (synonymous with C. granulosus according to White 2013, but still often considered independent), C. seychellorum, C. squamosus, C. tessellatus , C. uyato, C. westraliensis, C. zeehaani The fossil records are limited to 3 species, Centrophorus granulosus, squamosus and primaevus. They appear from the late Cretaceous (Haumurian) or early Paleocene (Keyes, 1984). It is possible to distinguish different species based on their teeth, but in many cases it is very difficult, especially without locality data and due to the lack of and contradictory information. I would like to show you the teeth of 9 extant Centrophorus species from my collection and the 3 known fossil species. I would particularly like to focus on their teeth, as they are almost the only thing that can be detected as fossils and also what is most likely to get from the recent species. Since my English is unfortunately not good enough to describe the tooth shape perfectly, I will let the pictures do this The tooth formula describes the number of teeth in the upper and lower jaw. I have summarized them myself from the literature for most of the species, since there were often different numbers to be found. Centrophorus squamosus Is one of the largest representatives of this group (up to approx. 170cm) and is distributed worldwide. It can be found down to a depth of 2400m. The fossil record is currently limited to New Zealand (Keyes, 1984). Tooth formula: 30-38 / 24-32 Keyes, 1984 (fossils, found at different localities in New Zealand): Extant teeth/ jaw from my collection (35 / 30; 15x12cm): Centrophorus primaevus Extinct representative of this group (lived in the Late Cretaceous, Santonian). It is a relatively small representative with a body length of approx. 0.5m (previously known). Tooth formula: Unknown The fossils shown are from Lebanon (Kriwet & Klug, 2009): Centrophorus granulosus Also a large representative of this group (up to 170cm). The species is distributed worldwide, but not in the Mediterranean where it is replaced by C. uyato. It occurs to a depth of about 1500m. The fossil records are currently limited to France (Ledoux, 1972). Tooth formula: 36-43 / 28-32 Ledoux, 1972 (fossils from France): Ebert & Dando, 2021: My collection (39 / 30; 9x8cm): However, most fossil Centrophorus teeth found in publications are not assigned to a specific species, but only as Centrophorus sp.. Here are a few sample images from various publications: Mannering & Hiller, 2008 / Schutter & Wijnker, 2012: Below I would like to post pictures of the remaining extant Centrophorus species. Unfortunately, for some species the information is very scarce and, as I said, often contradictory.

Found this in the Hell creek formation in eastern montana. It measures 2 7/8” long by 3/4” wide. It definitely is not crock. Leaning towards paraxenisaurus. “Strange lizard”. It would be rare in the Hell Creek.

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:

Working on an Archaeotherium jaw. It is in pretty rough shape and wish the teeth were in better condition, still a neat specimen. It still needs work but what do you guys think so far??

These are from the Pleistocene of Mississippi

I found this lower right jaw bone exposed on the bed of a creek in north central florida. It appears to be from an extinct canine species, but I am unsure and figured someone on here probably has more knowledge than I do on what it could be. Measurements are 7 cm in height at the tallest point, almost 15 cm in length, and 1 cm in thickness. There is one molar missing, and the incisors at the front are missing as well. Any help is greatly appreciated.

Hi, so i just got this mosasaurus jaw from morocco, could someone help me to figure out if it is real? If so, is it possible to say from which exact species it is? Its said to be from morocco... Thank you in advance!

Any thiughts on this? 6.5 inch in length. From Kem Kem. Jawbone. The texture dpesnt look croc, as it isnt rough enough. Features four tooth sockets. Plus a possible tooth stub. Cheers

Hello, I have what was traded to me as an ornithischian jaw from the Morrison Formation of Wyoming. It measures 5 cm high and has 2 teeth sockets. I believe it may be a Camptosaurus (due to being the only large ornithischian there) partial jaw, but I cannot exclude the possibility of it being a partial theropod jaw. May I have your thoughts? Thank you.

Hi all! What do you make of this 8 cm long jaw fragment from the Kem Kem beds?

Found near Ladonia Fossil Park, Fannin Co, Texas, late cretaceous. Please help with ID. Thanks!