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  1. readinghiker

    Unknown teleost (?)

    Hey all! This small jaw fragment was in the thousands of fossils pulled out of anthills. I am assuming it is a teleost. Other than several species of sharks, rays, and sawfish, there are pycnodonts, enchodus, and Protosphyraena. This looks like nothing I've found yet. Any ideas?
  2. dana hausen

    New Mexico Mud Fossil???

    I discovered this rock at the bottom of a dried arroyo in New Mexico this past June. I'm thinking it is a mud fossil. What do you think?
  3. readinghiker

    Unknown lamniform

    Hello all! I have around a dozen of these teeth. (Found in New Mexico. Coniacian.) The very prominent lingual protuberance should be diagnostic, but I can't find a match. Eostriatolamia tenuiplicatus looks good, but the crown has striations, and these don't. Archaeolamna kopingensis also looked good, but the secondary cusps of this species are oriented away from the main cusp. Leptostyrax macrorhiza also has labial striations. The narrowness of the cusps and crown also has me baffled. Any ideas?
  4. It was hard to believe that six years had passed since I last visited the badlands of the San Juan Basin...if you are interested, I posted a few of those previous trips here and here. With a new field season upon us, @NMFOSSILS99 and I made our first (of hopefully many) exploratory mission to the Upper Cretaceous Kirtland/Fruitland badlands of the SJB...
  5. Good day, all! Can anyone tell me the differences between Myledaphus and Pseudohypolophus? All responses will be greatly appreciated!
  6. readinghiker

    Unknown ray

    Here is another Cabezon taxa that I am having a hard time identifying. Is it Pseudohypolophus? Rhombodus? Myladephus? Something else? Any help will be greatly appreciated! Randy

    The Rio Puerco Valley

    The Rio Puerco Valley was my introduction to fossils...it immediately caught my attention...lit a match...became a place I am always eager to revisit...search...learn about... ...and in roaming it, have learned about myself. Many of my adventures in the Puerco are posted here, here...here and here...and here. From here on out, my excursions will be shared here. May you find happiness in your hunting. -P.
  8. readinghiker

    Cretodus cf. semiplicatus?

    This is a well worn tooth from the Cabezon fauna. With the lingual and labial plications, I am assuming this is a Cretodus. The narrow cusp leads me towards C. semiplicatus. However, the accessory cusp is not as triangular as I would expect to see from this species. Am I right in my assumption concerning the species, or am I off base? Thanks!
  9. Scylla

    Godzilla Shark

    Full skeleton of a 300 million year old shark found in New Mexico nicknamed the Godzilla Shark has been officially named dracopristis. https://news.yahoo.com/news/godzilla-shark-discovered-mexico-gets-204437107.html
  10. readinghiker


    Does anyone have a good picture of an onchosaurus oral tooth? Thanks!
  11. readinghiker

    Ischyrhiza mira?

    Hey everyone, I am trying to identify this tooth. My first guess would be an Ischyrhiza mira oral tooth, since I have a rostral tooth from the same site. But it also looks somewhat like the proposed Onchosaurus oral tooth as illustrated in Bourdon, et. al. (2011) page 39 tooth D. Or I could be completely off and it is some kind of orectolobid. What say you?
  12. Elkhorn

    Brachiopod or maybe coral?

    Fossil found in Sierra County New Mexico in a wash located in the Monticello Canyon. Geological determination for this area is documented as Cretaceous - Mississippian. We have found horn coral and some type of sea sediment rock in the wash. Would like to have an opinion on this fossil embedded in rock.
  13. Hello all! I have finally finished sorting close to 300 pounds of anthill from north central New Mexico. I recovered (literally) close to 18,000 fossils! Most are identifiable, but there are a few that I can't put a name to. I am going to put up several for your expert analysis (not being facetious, you guys have an enormous amount of knowledge!) to see what you have to say. I will repeat this introduction for each grouping of photos, only changing the take number. Thank you all in advance! This fossil shows the internal structure that I normally see in Ptychodus. But when I flip it ove
  14. The first is a strange tooth whose crown extends far into the root. As you can see on the photos, there is a bulge at the bottom of the crown, and that the root extends up the sides of the crown quite a ways. Any ideas?
  15. There is a new centrosaurine ceratopsid from New Mexico described here: https://link.springer.com/article/10.1007/s12542-021-00555-w If anyone is unaware, the holotype of Menefeeceratops sealeyi was initially described by Williamson (1997), who refrained from from giving it a name because the holotype was incompletely prepared at the time of its initial description. With the description of new centrosaurines from southern Laramidia over the past decade, the exact relationships of Menefeeceratops to other centrosaurines have now been possible to decipher. Williamson, TE
  16. 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/
  17. ThePhysicist

    Bull Canyon Microfossils

    I got many bags of micromatrix to sift through over the Summer, one of them being from the Bull Canyon Formation, which is Late Triassic in age (~227-208.5 Ma). As has been said many times before, not much is known about the teeth that can be found here, unfortunately. The vast majority of fossils that I've found so far are fish scales, lots of fish scales. I've found a few teeth, serrated and non-serrated (mostly partial), a couple of tooth plates/jaw fragments, and random chunks of bone. The matrix is about medium grain size. For scale, the sorting dish I'm using ha
  18. Day two of posts. I am posting four more fossils that I need help with. The first is a fragment. It looks like the tooth broke off right before the main cusp. There are two accessory cusps, the larger one looks like it has striations. This caused me to think of Cretodus semiplicatus. However, according to Welton, this shark only has one set of accessory cusps, never two. So any ideas?
  19. The final tooth of today is problematic in that it is a fragment. The main cusp seems to be complete, but that is all I can offer. Any help with this one? More to come tomorrow.
  20. The second tooth of today, at first glance, looks pycnodontid. But in the hundreds of pycnodont teeth I have found, I have never seen this type of ornamentation. And the root (as worn as it is) is definitely not that of a pycnodont. Any ideas?
  21. This is the other post that I was not able to find on the Forum (I'm sorry if I am just not finding it) This seems to be an odontaspid of some kind, but it is exceedingly small. Any ideas? I will be posting four more unknowns later today
  22. Sinestia


    I am posting new photos of the original item in question in addition to photos of some of the other finds. I sincerely appreciate everyone's comments and interest in this subject and above all I thank you for your time and patience. I will not cover anything from the original thread simply for lack of time so I suggest you reference "bone fragment" if needed. So the following photos are of just a few of what has turned out to be something wonderful in my opinion. The items that I and a trusted friend have uncovered are either not much at all or something very awesome. Again this is only a sm
  23. Hello all! I have finally finished sorting close to 300 pounds of anthill from north central New Mexico. I recovered (literally) close to 18,000 fossils! Most are identifiable, but there are a few that I can't put a name to. I am going to put up several for your expert analysis (not being facetious, you guys have an enormous amount of knowledge!) to see what you have to say. I will repeat this introduction for each grouping of photos, only changing the take number. Thank you all in advance! This fossil is somewhat like a cretolamnid, but is very small. An extreme cretolamnid lateral to
  24. Sinestia


    This is one out of the mystery box I purchased so no clue as to its orgins. It is also very heavy therfore dense.
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