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The jaw is from the phosphates of oued zem and measures 40cm more or less. It's a juvenile thalassotitan atrox or it's another species? Thanks! @Praefectus @pachy-pleuro-whatnot-odon

Recently purchased this at a local show. It looks good to me I just want to double check.

Came across this mosasaur jaw, wondering its real or fake. Thanks!

I haven't found enough jaw fragments to be confident IDing them yet. I found this in Summerville, SC in a creek with mostly Oligocene but some Miocene as well. I have two other odontocete jaw fragments from this creek, but both had the double rooted alveoli, so I knew they were odontocete. Is this one also odontocete? Fragment is 45 mm long, 24 mm tall, and 16 mm thick. One tooth's root is visible. Thanks so much!

The fossil in the images below is being sold as that of a Merycoidodon, but it looks rather small for such an animal, so I wondered if it could be from a smaller Merycoidodontid or perhaps another small ungulate like Leptomeryx. Thanks in advance for any guidance Othniel

I recently saw a 1.2cm long Oligocene mammal jaw from South Dakota, judging by the coloration of the specimen from the Brule Formation, up for sale. The jaw is referred to as Leptictis haydeni, but the description states it to be from a primitive weasel. Moreover, I have never seen any Leptictis material for sale and the dentition looks as much like that of the relatively similarly named but much more common Leptomeryx than any leptictid. Thanks in advance for any guidance Othniel

Hi, what species of mosasaur is this? From the phosphates of Morocco. I will tag you @Praefectus @pachy-pleuro-whatnot-odon. I am thinking Eremiasaurus left dentary with some stuff?

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.

Khorigba, morocco looks like matrix instead of jaw.

Any thoughts on what this is? It was collected inland in Sarasota county. It looks to me like a Jaw from something. It has groves for teeth?

12.6" Mosasaur Prognathodon Fossil, 2 lbs 6 ounces, 4.7 inches wide, 1.5 inches thick Location- Qued Zem, Morocco Seller doesn’t mention anything about repair or restoration so I’m not sure about that I’m wondering if it’s restored. Are the teeth original to the jaw? And are those bite marks

Is this a notosaur's lower jaw? It is from Yunnan of China. And is it a cervical vertebra at the lower left end of the jaw?

Hello, A family friend passed away and left me his rock, mineral, and fossil collection. Much of it was labeled, but there were several boxes of odds and ends that I’ve been working to identify. I believe this is fossilized bone as it’s heavy for its size. Forgive me if this is just bone. I don’t know where this is from, but my friend collected in CA primarily in the 70s through 80s. Most of his stuff was from local shows around that time. Any ideas of what this might be?

Hunting 10 days ago, I found a fossils at different spot and now have the time to show these: I believe it to be a Tapir right side mandible with no teeth. As time permits , I may try to ID which tapir. Upper right is an antler stub, then a barnacle cluster and a number of shells that I have not IDed. I think the coral on the right is Solenastrea hyades, which did exist in the Pliocene_Pleistocene of Florida But the fossil I want to identify is this: What is it ?... echinoid ? I have a sand dollar that is something like that... maybe gastropod worn down to an inner slice ? In this case, your guess is definitely as good as mine, because mine is not very good.

I am once again asking for your expertise! This is one of the nicest fossils I’ve found, considering fish jaws and teeth are not that rare - but finding a jaw with teeth inside doesn’t happen that often at this beach. It was found at the Zandmotor beach in the Netherlands. This beach is known for Pleistocene mammal fossils. Fish vertebrae and teeth are also common, which may be way older than Pleistocene. I posted this fossil on Reddit some time ago too, but wasn’t able to get a conclusive answer. Someone suggested it might be amiid, but I don’t think amiid are found here. Could it be esox lucius (pike)? The total length is just short of 4cm. Unfortunately I had to apply paraloid before desalination, because the fossil was already starting to fall apart.

This is being sold as a Spinosaurus premaxillary jaw from the Kem Kem, but I'm suspicious. Any opinions? And if not Spinosaurus, what could it be? Size 23 cm / 9.06 inch

spotted this online, claims to be a dinosaur jaw from hell creek, but is it actually from a dinosaur, surely it could be from a croc aswell, anyone more knowledgeable have a better id?

Got this jaw/skull piece at a shop recently that was labeled Hyracodon. I don't think it looks like Hyracodon, but I don't know what it could be. Any ideas?

Hi all, This jaw was just listed on a particular auction site and caught my eye. Locality according to the seller is Hell Creek formation, Montana. The fossil is 15mm long. Their ID is just "dinosaur" of unknown species. To my amateur eyes, the size and "shelf" on the inside of the bone makes me think lizard, but the teeth really look like those of dromaeosaurs. Any thoughts on ID? Lizard, juvenile dromaeosaur, or bird even?

Hi Guys, On our hunt today for shark teeth my daughter found this jaw bone. It feels fossilized. Found in eastern NC in a stream that cuts through a lot of different ages including Pleistocene deposits. What do you guys think? Thanks, John

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.

Hello, saw this for sale and was wondering whether it was croc or spinosaurid, it’s from Morocco, Africa. I’m leaning towards spinosaurid, but I’m not an expert. Please also let me know if there is any repairs/restro. Thanks a lot!