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  1. dongmin

    deinosuchus?

    It was discovered in the Chattahoochee River in the United States. I wonder what kind of alligator it is. Could it be Deinosuchus?
  2. Fullux

    Juvenile Deinosuchus?

    Howdy all, Recently purchased this little crocodilian tooth from the Bladen Formation of North Carolina. The seller says it's Deinosuchus and I feel pretty confident with that ID, considering the faint ridges, but I'd like a second opinion as I'm not yet an expert on the Campanian of Appalachia. 0.2 inches, perhaps a juvenile?
  3. Fullux

    Deinosuchus?

    Howdy all, I'm interested in this tooth from the Tarheel formation of Bladen County, North Carolina. It's been identified as coming from Deinosuchus schwimmeri, and it looks like it to me, but I just want to be sure.
  4. Andúril Flame of the West

    Stratigraphic Range of Deinosuchus

    Having the opportunity to review some literature today, I came across an interesting figure that I had not noticed beforehand. In their paper describing the fauna of a Severn Formation locality in Maryland, Harstein et al. (1999) include a photograph of a tooth assigned to Deinosuchus rugosus (Specimen 59). This struck me as strange since the Maastrichtian is typically considered to be early to middle Maastrichtian in age. However, from what I gather it seems that the youngest confirmed occurrences of Deinosuchus are in the late Campanian. Have I missed some literature and is Deinosuchus known to occur in Maastrichtian strata? It may also be important to note that in the paper, the particular lens where the tooth was found is described as a thin lag layer occurring at the contact between the Severn Formation (Maastrichtian) and the Matawan Formation (Campanian). I am inclined to believe that the fossils are from the Severn Formation and that they are indeed Maastrichtian in age, but is it possible that they may instead be from the Matawan formation? As always, any expertise is greatly appreciated . Hartstein, E. F., Decina, L. E., & Keil, R. F. (1999). A Late Cretaceous (Severn Formation) Vertebrate Assemblage from Bowie, Maryland. The Mosasaur, 6, pp. 17-23. https://drive.google.com/file/d/0B1HtUwlDORQ0Q29JZjF2NUg1QXc/view?resourcekey=0-5BbGrGtBu1LIFY7jLj8LGQ.
  5. Howdy all. I'm curious, how many species of crocodylomorphs are known from the Black Creek group and what are they? All I know of is: - Deinosuchus schwimmeri - Borealosuchus formidabilis - goniopholididae indet.
  6. Is it possible that large crocodylians such as Deinosuchus and Purussaurus could have had levels of intelligence similar to that of say, elephants? Could larger body sizes equal higher intelligence? Crocodylians are already very intelligent, so I think it may be possible that as their body sizes increase, so do their levels of intelligence. This may seem impossible at first, but this has happened with other archosaurs as well. Tyrannosaurus is possibly the best example of this. Its relatives likely had intelligence comparable to that of bears and wolves, but as it got larger, its intelligence became more comparable to that of primates and corvids. I suppose to prove this we'd have to scan the brain case of a deinosuchus or purussaurus. This has to be the most elaborite shower thought I've ever come up with.
  7. Fullux

    Deinosuchus rugosus

    So, I'm curious. Is Deinosuchus rugosus still considered a species? Or is it now Deinosuchus schwimmeri? And the same for D. hatcheri and D. riograndensis. Also, how many species of deinosuchus are currently accepted? As far as I know, it is only D. hatcheri/riograndensis and D. rugosus/schwimmeri, with the former living in Laramidia and the latter living in Appalachia. One more question, I heard that there was D. rugosus/schwimmeri material found in a miocene deposit, is that true?
  8. Fullux

    Deinosuchus?

    Howdy all! I recently bought this tooth from the Bladen formation of North Carolina. It was described as Deinosuchus rugosus as I'm pretty sure that's what it is, but I need a second opinion. Regardless, I'm still so excited to finally have some material from this formation!
  9. Fullux

    Deinosuchus?

    I'm pretty sure this is a deinosuchus tooth but I'm not 100 percent certain, is that what this is? Black Creek Group Cape Fear River, Bladen County, North Carolina, United States 28mm (1.1")
  10. Would appreciate some help in identifying if this tooth is Deinosuchus? Notice the striations on the tooth that are present on Deinosuchus teeth. Tooth measures approximately 1.10 inches Formation: Aguja Formation Location: Brewster County, Texas Age: 81.5-76.9 mya, Cretaceous Thanks in advance!
  11. dongmin

    Deinosuchus tooth

    deinosuchus tooth good! The tooth was found in Chattahoochee River
  12. Fullux

    Deinosuchus?

    Really interested in this specimen. Found in Barbour County, Alabama. Described as being Deinosuchus rugosus. Is that accurate?
  13. 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.
  14. NM Ben

    Fossilized Tooth Structure

    Hello Folks! I want to get better at identifying fossilized teeth. My family and I spend a lot of time hiking through Jurassic and Cretaceous deposits in the western US that contain largely vertebrate terrestrial fossils. We've found a lot of fragmentary bone, and over the course of picking up a few thousand bone fragments, have developed a pretty good eye for telling what is bone and what's just pretending to be bone until you bend down to pick it up. Teeth, however, we're far less adept at identifying. Wandering around the desert, without training wheels, how am I to tell what a fossilized tooth looks like if I've not seen a tooth? Hm... Luckily, we've stumbled upon enough obvious examples of teeth that we do have some data on what they look like - but precious little data. We've only ever found a handful of easily identified teeth, so we're not so good at identifying the poor quality stuff. Sometimes the tooth structure just looks like chert/chalcedony, and sometimes there are similarities to the structure of bone. What are some key features I can look for that are unique to teeth? Below is an example where the Allosaurid ID is only given away by the serration imprints left behind - the "meat" of the tooth just looked like fracture chert/chalcedony. I wouldn't be able to prove it was tooth material without the serrations. Allosaurid tooth (Brushy Basin) - ~1.5inch length Another tooth (~half inch diamter), this one from the Cretaceous Menefee, found nearby crocodile type scutes (Deinosuchus?), but whose core has porosity similar to fossilized bone. Very different structure from the Allosaurid tooth, but the texture of the outer layers tell me this isn't just a bone. I believe this could be up in the root of the tooth, and these hollow channels are what is left of the blood vessels that supply nutrients to the teeth. I've had a hard time finding any example pictures online of a cross section looking into the root of a fossilized tooth to confirm. Opinions? Anyone have good example pictures of tooth root cross section? In situ in the same boulder as the above tooth. More porous core. Another example from the same boulder. Cast remnants of another crocodilian tooth (Osteoderm was in situ in the same boulder) from the same layer a mile away from the above examples Another example I suspect is a tooth from the Menefee, found in float. Porous structure within looks similar to decayed haversian canal structure we find in bone, but the structure as a whole doesn't strike me as bone. Small <1cm Goniopholid tooth from Jurassic Brushy Basin. Without fluting and external material, I'd have a hard time convincing myself this was anything but some small chalcedony inclusion or other in the sandstone Another 1cm (tooth?) I would brush off as inconclusive if not for the context of being next to the above tooth Does anyone have any wisdom to give to help discern bone fragments from teeth? Thanks for taking a look! Ben
  15. Hi everyone, I am trying to find the following stuff someone is willing to trade. - Mosasaurus partial jaws or matrix pieces, not repaired or restored. From Morocco. - Belgian Megalodon teeth - Mastodon tooth - Quality Spinosaurus teeth, larger ones. I got a lot to offer, mostly teeth and jaws from dinosaurs and ice age relater animals.
  16. Here I have a prett rare a nicely preserved Deinosuchus Riograndensis tooth from the Bufftown Formation, Alabama. Looking for great quality theropod teeth from the KemKem region, preferably Carcharodontosaurus. Open for other dinosaur teeth as well. Just hit me up!
  17. Made a second trip to North Carolina's Black Creek group last week, and was definitely rewarded! Lots of interesting finds, the best of which are shown below: Deinosuchus rugosus (D. schwimmeri) teeth, osteoderms, skull fragments, and one MASSIVE coprolite. Also, the bottom right bone is either mosasaur or crocodillian/alligatoroid, I believe either from the hand or leg, hip maybe, but not sure on the exact ID.. Dinosaur teeth! One's definitely hadrosaur, the other I have as the broken-off, enamel-less tip of an indeterminate therapod crown..you be the judge on whether that one's a tooth lol. I think it is, the break has the exact shape of a broken-off Carcharodontosaurus spp. crown tip I have.
  18. Here is my newest addition to the collection. A pretty decently sized Deinosuchus riograndensis tooth from the Aguja formation in Texas. The colors and quality on this tooth is actually insane, do not get much better than that.
  19. FF7_Yuffie

    Deinosuchus?

    Hello I am considering getting this set of Deinosuchus teeth. 37 teeth. They are from Chattahoochee River region, Bullock County, Alabama, USA. With the formation given as Ripley Now, looking online, it doesn't show Deinosuchus as being from there. But I do see teeth sold elsewhere as Deinosuchus from the Chattahoochee River. They were also apparently found in a dive along with David. R Scwimmer, who wrote a book on Deinosuchus. The largest is 27mm the smallest 10mm. If someone can take a look, that would be great. fossil_deinosuchus_crocodile_t_1594656235_74263265_progressive.jfif
  20. Hi all, last week I found a tooth that I’m pretty sure is crocodilian, I believe it might be from Deinosuchus rugosus, any thoughts? The tooth is from NC Tar Heel formation sediments. Btw it has two carina. Also, I have a bone fragment I found from the same location, I believe it’s from the skull or possibly the rib of a mosasaur or crocodile, or I guess possibly a large turtle. Is there any way to identify it further? Organisms can have different bone morphology at the histological level, wanted to see if anyone could narrow the bone down to coming from a turtle, crocodile, or mosasaur based on the bone structure. Although it may not be possible just by looking at the pics. Thanks!
  21. I recently went on two fossil hunting trips to Cretaceous sediments of Eastern North Carolina, the second of which was earlier today. Today’s trip to the Bladen formation yielded baculites ammonites, some worn mosasaur teeth, the nicest goblin shark teeth I’ve personally collected, some fish mouth plates, turtle shell fragments, and some other goodies. My first trip a couple weeks ago was to Tar Heel formation sediments and I collected several small mosasaur teeth, a mosasaur vertebra, a piece of petrified lignite, lots of goblin and crow shark teeth, lots of turtle shell, a very worn Deinosuchus tooth, and some coprolites (I’ve posted a few of the images from this trip in the ID section of the forum already). North Carolina is an amazing U.S. state for fossils, it has loads of fossils from the Paleozoic, Mesozoic, and Cenozoic (although if you want Jurassic look elsewhere). If you haven’t already, you should come check it out! Pics from today’s trip: Pics from the first trip:
  22. Troodon

    Deinosuchus from New Mexico

    The attached paper describe six osteoderms, two vertebrae, and a partial tooth discovered in the Menefee Formation of New Mexico and representing one of the earliest occurrences of Deinosuchus on the Laramidian subcontinent. https://peerj.com/articles/11302/
  23. BellamyBlake

    Deinosuchus

    I have here a tooth alleged to be Deinosuchus from the Aguja of Brewester County, Texas. It's 1" long. Does it appear to be so? And how would this be differentiated from other crocodile teeth in that formation? Thank you, Bellamy
  24. otto_haas

    Identifying Cretaceous Crocs

    Happy holidays all! I have a friend who has a croc tooth, I am interested in. I think it is from somewhere in Montana or Wyoming. It's a little over 1.25", including the root, which is mostly there (sorry, I don't have pictures). What suggests the species of croc, deinosuchus, brachychampsa, leidyosuchus, etc.? They all seem very similar to me. Is it impossible to ID or are there signs pointing towards one species? I am also curious, if the root is present, does that meant it came from a dead animal, or did they shed roots, too?
  25. Here's a third North American Alligatorid named this year, discovered in the Late Cretaceous Atlantic coast, from New Jersey to Mississippi. This follows a post I made on Friday, Dec. 18, concerning two others discovered this year: 3. Deinosuchus schwimmeri A systematic review of the giant alligatoroid Deinosuchus from the Campanian of North America and its implications for the relationships at the root of Crocodylia ABSTRACT: Deinosuchus is a lineage of giant (≥10 m) Late Cretaceous crocodylians from North America. These were the largest semiaquatic predators in their environments and are known to have fed on large vertebrates, including contemporaneous terrestrial vertebrates such as dinosaurs. Fossils have been found in units of Campanian age from northern Mexico to Montana in the west and Mississippi to New Jersey in the east. Three species have been named, and recent consensus suggests that they represent a single, widely ranging species. The authors studied newly collected material from western Texas and increased sampling from throughout North America to review species-level systematics of Deinosuchus and help refine its phylogenetic placement among crocodylians. Deinosuchus from eastern and western North America can be consistently differentiated and represent different species. A phylogenetic study is conducted including new character states. This work reinforces the identity of the ‘terror crocodile’ as an alligatoroid. Reference to the holotypes indicates that the generic name holder, Deinosuchus hatcheri, is extremely incomplete. As a result, the three known species of Deinosuchus cannot be differentiated. To ensure nomenclatural stability, the type species for Deinosuchus should be transferred to Deinosuchus riograndensis, a species known from multiple mostly complete individuals. Additionally, Deinosuchus rugosus is based on a holotype that is not diagnostic, and a new species, Deinosuchus schwimmeri, is named to encompass some specimens formerly assigned to D. rugosus. https://www.tandfonline.com/doi/full/10.1080/02724634.2020.1767638 News article: http://www.sci-news.com/paleontology/deinosuchus-schwimmeri-08730.html Image credit: Cossette and Brochu. doi: 10.1080/02724634.2020.1767638.
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