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  1. I got this one from an auction recently. It has been glued back together as it arrived damaged. However, I wonder if it is real or just a fabrication made from stone. I would appreciate your input! Thanks!
  2. Checking to see if this specimen checks out before I purchase it
  3. Crinoids

    Heteromorph amonite

    Just wondering if there is anyway of telling what species this is and is it rare?
  4. Hello, How much of this Russian ammonite seems natural and original? Any compositing or restoration (aside from the obviously poorly-restored inner whorl section)? To me it looks good aside from the inner whorl, but sometimes they restore these super well so it can be hard to tell. @Kanopus
  5. Recently, while exploring the upper unit of the lower eagle ford formation (late cenomanian), I found a sandstone slab riddled with impressions of the charismatic Allocrioceras, potentially A. hazzardi or A. annulatum (I'm trending to the latter). Despite their usefulness as index fossils (A. hazzardi in west Texas indicates the lower Boquillas fm), sought after status, and amazing specimens like a Cenomanian A. annulatum found with gut contents, no life reconstructions exist of this genus online. So, I thought I'd give it an effort and reconstruct it myself. This is my first time attempting paleoart since elementary school so despite the many errors I notice now, I'm actually pretty pleased with it. I have several finds that no paleoart exists for that I'm keen to try reconstructions on now too. Next in queue is probably the enigmatic fish Hadrodus, and I'd love to do a cretaceous sea floor scene with Stereocidaris in it, particularly the Austin Chalk specimens I found - matching the background ammonite, fish, and reptile fauna. I'd also love to reconstruct the new mosasaur my brother and I found, but for the description paper an actual artist will be called in.
  6. Hello, I wanted to get some opinions on this heteromorphic ammonite. It is said to be a Colchidites breistrofferi (61 mm) from the Uppermost Barremian of Paja Fm. in Santander, Colombia. Seller claims no reconstruction/restoration, but it looks quite rough to me. Does it seem legitimate? Is this typically how rough these are, or is this one just badly preserved/prepped? And does the ammonite look complete including living chamber? Thanks!
  7. bockryan

    Nostoceras sp.

    From the album: Fossil Collection: DC Area and Beyond

    Nostoceras sp. Unknown location, Madagascar Unknown Late Cretaceous
  8. Mikrogeophagus

    Trachyscaphites spiniger

    From the album: Ozan Formation

    Trachyscaphites spiniger, North TX Campanian, Cretaceous Jun, 2023 My new favorite ammo in my collection.
  9. Heteromorph ammonites- why the weird shapes? I am at a loss...
  10. Good day to all ! I was recently offered (by a Moroccan dealer) 2 heteromorphic ammonites at reasonable prices, and would appreciate any input. Both are around 40cm ( 16 in) in total length, and the details on their proversum, flexus and retroversum seem rather convincing. (see the 1st and 2nd photo) What appeared suspicious are the following: - the 2 ammonites are of non typical colorations (this is due to protective coatings per the vendor) - their remaining matrix seemed too smooth and flat, resembling that of a confirmed plaster casting made in a French museum (see the 3rd photo) It is claimed by the vendor that these Ancyloceras were found in broken pieces and glued back, but were mostly 'originals'. Only their spirals were restored/reconstructed. Similar Ancyloceras Sps from the lower Aptian plurimetric clayey formation of east Paris basin in France are known to be extremely rare (Bersac, 2020), but I have no idea how common these are in similar formations of Morocco. Again, thanks for any input ! reference: https://www.sciencedirect.com/science/article/pii/S0753396919300497 Bersac, 2020
  11. Mikrogeophagus

    Mariella worthensis

    From the album: Pawpaw Formation

    Mariella worthensis, Tarrant Co. Albian, Cretaceous Dec, 2022
  12. Mochaccino

    Didymoceras ammonite identification

    Hello, Can someone help me identify these two Didymoceras pieces to the species-level? They are from Montana and both were repaired from a few fragments, though neither is said to be composite. From what I can tell they are in the 10-15cm range in terms of size. 1. This one seems to be part of the inner whorl, and based on how close the coil is I think D. cheyennense might be excluded, which leaves either D. stevensoni or D. nebrascense? Also in the 3rd photo there is a strange mismatch between the fragments...a poor fit or composite perhaps? 2. This looks like a section of the inner whorl lower closer to the living chamber. Any help would be appreciated, thanks!
  13. Visiting fossil collectors from the Odessa school district found the specimen in the first picture and I was reminded of one I found 7 years earlier at the same site shown in the next images. When they asked for the name I had to admit I didn't know. These came from Moss Creek, a nearby tributary of the North Sulphur River and exposing the same deposits, the Ozan Formation from the Taylor Group of the upper Cretaceous. My example is 65 mm long, with a whorl 30 mm X 15 mm. The fragment has a slightly curved shaft, compressed whorl section with a rib index of 4 per whorl height. It has a sharp venter, rounded dorsum and ribs slanted in an adapical direction along the venter and interrupted on the dorsum. There are no visible sutures other than in an area to small to interpret. There appears to be a single row of tubercles in the center of the venter unless this is a result of being pinched out in preservation but both specimens show this feature. The site produces some examples of Glyptoxoceras sp. which is the closest thing I know of but I don't believe those have the tubercles and they are curved a lot more. Glyptoxoceras ellisoni from the older Austin Group is less curved but also without the tubercles.
  14. Hello, I came across this listing for a Australiceras/Proaustraliceras ammonite from the Cretaceous Volga River of Russia, about 12 inches long. In terms of restoration, it is just said to be "cleaned, prepped and stabilized". To my amateur eye, there are no suspicious spots or abrupt changes in texture that would indicate reconstruction/restoration or compositing, and I think the matrix also looks typical of the region. What do you think? Any tampering going on or is it all-natural? Thanks. EDIT: I actually noticed there is some change in texture in this part. Not sure if it's shell loss or possible reconstruction, I might ask for more photos
  15. Hello, I have another tricky ID request with no provenance, for this section of a heteromorphic ammonite. Technically I did get an ID and provenance from the seller as a Nostoceras malagasyense from Madagascar, but the preservation looks very different (more grey/white than brown). This was a chinese seller on that auction site who had that generic ID for a variety of pieces so I suspect it isn't accurate, and he couldn't provide more info when I asked. In the past I did ask about this specimen on this forum using seller-provided photos; I was told it looks instead like material from the Pierre Shale of USA, but was unable to further ID beyond "Nostoceratid ammonite". Now that I have the specimen in-hand and done some research I figured I'd ask again. Here are photos and some observations I've made: -Dimensions: the section is about 8 cm long; the chamber thickness is about 3 cm. -The preservation is of a chalky/pearly white+grey coloration, uncharacteristic of Madagascar specimens which appear sandy/grainy and brown. It has parts of white nacreous shell which are faintly iridescent in greenish-blue, though this is not as obvious in the static photos. Might indeed point to Pierre Shale, as I have seen Didymoceras specimens from there with a very similar look. -Based on shape of coiling, I suspect this heteromorphic section includes the last whorl of a helically-coiled turret/spire and the initial part of a U-shaped living chamber which coils "down" and away from the turret. I think this points to either Nostoceras or Didymoceras. You can see the direction of coiling changes sharply midway where the living chamber would've started. -The helical whorl section appears to have been in close contact with the whorl above it. There is a clear impression and maybe even part of the adjacent whorl's nacreous shell. I figure this is significant as it seems characteristic of the genus Nostoceras. Didymoceras stevensoni also has whorls touching each other, while D. nebrascense and D. cheyennense do not. -It seems to lack any tubercles/spines on the surface, which may rule out Didymoceras. -The oak leaf-like sutures are visible in parts, though I'm not sure how useful that is. So far, my best guess is that it's of the genus Nostoceras, and with the big assumption that it is from the Pierre Shale I've done some research into the heteromorphs that occur there: 1.https://digitallibrary.amnh.org/bitstream/handle/2246/1597//v2/dspace/ingest/pdfSource/bul/B251.pdf?sequence=1&isAllowed=y 2.Kennedy et al. 2000 9626-31949-1-PB.PDF 3.https://www.mindat.org/paleo_strat.php?id=13232 Kennedy et al. 2000 especially describes several heteromorphs from the Pierre Shale including a few species of Nostoceras. Nostoceras cf. N. approximans Nostoceras cf. N. obtusum Nostoceras larimerense Nostoceras cf. N. splendidum N. larimerense is the only one with a described body chamber that departs from the spire, but even then it is very slight and doesn't seem to point as sharply away as in my specimen. The holotype is shown below. Size is another inconsistency. The Nostoceras described here range from 2-4 cm height; the above N. larimerense holotype is ~4.3 cm tall. On the other hand, a single whorl in my specimen is about 3 cm thick, so it seems much larger than any of these described Nostoceras. Finally, all Nostoceras described here (as well as Didymoceras) have tubercles on the outer whorl faces, especially on either the last whorl or body chamber. But as mentioned, mine does not seem to have any discernable tubercles. That was a long post and I thank you if you've gone through it. I've tried my best to piece together what I could, and I'd appreciate anyone's thoughts. When it's all said and done I'm thinking it might just have to be Nostoceras sp., whether or not it's actually from the Pierre Shale.
  16. Hello, I came across this Muramotoceras ezoenze (yezoense?) ammonite from Yubari, Japan, and was wondering if it seems legit and natural without restoration/reconstruction/tampering? The whole piece is about 6cm at its widest. I can't accurately assess the quality of preservation/prep, but to me the appearance seems consistent with other specimens, except that this one seems incompletely prepped. For the same reason I don't think there is going to be much tampering with parts still embedded in rock but I am no expert. The seller isn't completely sure, but thinks there is no tampering other than the matrix being cut flat for display purposes. If it helps, I am waiting on some extra close-up photos of inner whorls, and maybe some photos with UV. Any thoughts? Thank you.
  17. Following a refreshing swim at the lake with a few friends over the weekend, I decided to take a spur-of-the-moment stop at a construction site I happened to be driving by. The sun was setting, cooling the area and finally making it hospitable despite the recent heat wave. I was not familiar with the exact geology of where I was, but with only an hour and a half of daylight left I decided to not waste too much time and immediately began scouring the dirt. I quickly noticed that the ground was composed of two distinct formations. The higher layer was a grey limestone while the layer underneath was bright red and filled with a wide range of greens and yellows among other colors. It was only until I got home that I realized these were the Grayson Marl (/Mainstreet limestone?) and Pawpaw formation respectively. My first find was an unexpected, but welcome one. Coming from the grey rock, I noticed a rounded form that stood out against the jagged terrain surrounding it. After prying it out, I was surprised to find that it was indeed a large nautilus (A). Not too long after, I found a couple more that were in slightly worse condition. Continuing my search in the greyish area led me to later find a chunk of Mariella heteromorph ammonite (B) as well. I particularly like this specimen as it is interesting to compare it with my Mariella micromorphs from the Waco Pit and other locations. I also managed to snag a few pretty little brachiopods (C). I have a really difficult time differentiating between brachiopods so my ID for them is a bit iffy, but for now I'll go with Kingena wacoensis. The cool thing about this site is the fact that it sits on the border of two very distinct formations. As a result, one can find a wide variety of fossil life. The rest of the things I brought home from this trip were found in the red Pawpaw formation. For whatever reason, Texas loves to produce pyritized micromorphs. I was surprised to come across a multitude of ammonite genera with that classic bronze coloration I've come to be all too familiar with. I found a few un-pictured fragments of Mariella and other ammonite pieces. I was also able to pocket a few chunks of my favorite ammonite, Engonoceras (D). I didn't really capture its beauty well on camera, but something about the way light bounces off of the broad reflective shell is mesmerizing. I hope to one day come across a complete one. To round off the hunt, I found one last slightly enigmatic specimen (E) that came out of the Pawpaw. Its a big rock with lots of holes running in and out of it. The holes are covered with countless tiny divots. My guess is they are what's left of some crustacean burrows as they bear some resemblance to the poopy burrows I have seen elsewhere online. Some of the burrows have crystallization. Here are the finds: A). A large nautiloid and a smaller one coming from the Grayson Marl. I believe them both to be Cymatoceras. There is some extra matrix on the outside that I am debating on chiseling off. B). A fragment of Mariella heteromorph ammonite from the Grayson Marl. C). Kingena wacoensis? from the Grayson Marl. They have some nice detail! D). Pyritized Engonoceras fragments from the Pawpaw Formation. E). Crab burrows from the Pawpaw? All in all, I'm glad I made a quick stop at this particular site. It's a pretty interesting place with a wide variety of things to be found in a couple of formations I have only just begun to explore. I will likely make another trip there in the future! Thanks for reading!
  18. rocket

    Scaphites obliquus

    From the album: Westphalian cretaceous fossils

    unique and lovely are heteromorph ammonites like Scaphites. This small but great one comes from middle cenomanian of southern germany, housed in the collection of a friend of mine
  19. rocket

    Scaphites cf. diana

    From the album: Westphalian cretaceous fossils

    a very nice and rare Scaphites cf. diana from upper middle santonian of Gelsenkirchen-Buer. One of the most perfect diana I have ever seen, around 4 cm
  20. rocket

    Aegocrioceras_Resse

    fine uncoiled Ammonite Aegocrioceras bicarinatum from the tonstein-pit Resse near Hannover. Lower cretaceous, hauterivian. Small ammonit, 5 cm diameter. Phragmocon is pyritized, living chamber partial calcited. Aegocrioceras is a very various ammonit, from tightly curled up to strange and very twisted shapes. I will post some next time

    © fossils worldwide

  21. Hello, Does this association of Didymoceras cheyennense and Baculites compressus seem legitimate? Any restoration/reconstruction going on, or composite of multiple individuals, especially on the Didymoceras? Dimensions are 22cm x 14cm x 14cm, and listed as of Lower Cretaceous age and from the Pierre Shale of South Dakota. Also, if you had to pick one heteromorph ammonite specimen, would you personally purchase this for your collection (i.e. is it a good example of Didymoceras cheyennense)? I realize this is just a part of the inner whorls. Complete Didymoceras in general seem to be very rare and exorbitantly expensive so perhaps this is a good enough piece? I don't exactly have a fortune to spend, but I can justify one big purchase as a gift to myself. Thanks.
  22. Mochaccino

    ID Ammonite?

    Hello, Anyone know what species this is (and if it's legit)? The seller simply calls it a heteromorph from Germany, late Cretaceous ~ 60mya and measures about 10.8 cm long.
  23. Hello, I'm considering purchasing between 3 heteromorph ammonites. I wanted to ask if they are authentic, and whether it seems like there is any restoration or carving going on. Also, if there's any one that looks to be in particularly bad condition. Here is #1. Presumably Nostoceras: #2, also Nostoceras, appears upside-down in matrix with turricone still embedded. Perhaps I can prep that myself? And #3, listed as Acrioceras tabarelli:
  24. Hello, new member here. I just purchased this heteromorph ammonite from what's considered a reputable website but I've started to get concerned on the authenticity of this specimen due to the heterogeneous coloration (some places dark, some places light). Is there a chance there's some fake pieces as a composite or perhaps heavy restoration? Also it was listed as eubostrychoceras indopacificum, but it looks different from photos of other such specimens. It seems more like a Nostoceras malagasyense, but perhaps I'm just mistaken?
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