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  1. I just made new ID posters for Hamilton Group Cephaloods - one for Nautiloids and Bactritoids, and one for ammonoids. The reconstructions are either new or updated for accuracy. Color patterns on the first picture are based on close relatives. If anyone has any suggestions, please let me know - I want these to be as useful as possible.
  2. Yesterday I finally made it out to one of my favorite hunting spots after (almost exactly) a year away. This road cut in La Salle County Illinois had been visited earlier this year (I believe) by @Nimravis, @aek and @connorp, but I really wanted a crack at it before summer fully kicked in. As I had been warned, it was already heavily overgrown, with poison ivy located intermittently across the slope. There were also mosquitoes in the shady areas and wasps in the sunny ones. However, with some delicate maneuvering I was able to avoid most of the hazards, with only some mosquito bit
  3. Bringing Fossils to Life

    A tiny orthoconic cephalopod from New York

    Hi everyone! I just got back from a trip to Penn Dixie Fossil Park near Buffalo, New York, and found some pyritized cephalopod fossils. Penn Dixie has rocks form the Givetian of the Devonian from the Hamilton Group. A young ammonoid is easily identified as Tornoceras uniangulare, but the other orthoconic fossils are harder to ID. I am pretty sure the small but more complete one is a Bactrites, because the siphuncle appears to be almost ventral, the distance between the septa, and the slightly slanted suture (after looking at Ludwigia's). The preserved shell is very smooth and couldn't be from
  4. I think it looks shockingly similar to charnia. Maybe a cephalopod, snail, or plant? What could it be?
  5. One of my friends has a Whitfieldoceras specimen from the Ordovician of Wisconsin. He asked me if I knew anything more about it. I didn't and didn't see much online. Does it have a record outside the Ordovician? Is it found elsewhere in the U.S./the world? I have the same question about Beloitoceras. He has one of those from the same site. I think I have one from a Minnesota site somewhere but couldn't find it. Is it known from elsewhere and did it survive beyond the Ordovician? Thanks, Jess
  6. rocket

    Pseudocenoceras

    From the album: Westphalian cretaceous fossils

    In southern munsterland basin it is sometimes possible to dig in cenomanian sediments. Fossils are rare, but sometimes real beauties like this fine, 4 cm "big" Nautiloide Pseudocenoceras
  7. Hi guys, I bought this ammonite at antique store, It measures 25 CM. Could anyone help me ID the fossil? Baja California, México. It could be pachydiscus? Thank you! Best regards!
  8. Rexofspades

    Lost River Easter egg hunt

    Went on a little "Easter Egg Hunt" with my folks, found some excellent fossils. day was hot but I enjoyed it. I have provided my best ID, but please feel free to correct if you can identify it further! it helps with my labeling system for sure. this lizard was good luck right next to where my mom was standing i noticed this beauty sticking out of the rock further excavation revealed this possible horn coral? eldredgeops rana heads trilobite glabellar fold ( possibly Odontocephalus?) Dipleura rib impre
  9. Rogue Embryo

    Upper Ordovician cephalopod

    From the album: Camille's fossils - Georgian Bay Formation

    Field collection by Camille Martin, April 4, 2022 The fossil offers a bit of an interior view of the cephalopod.

    © Camille Martin

  10. Hello, would appreciate help with a fossil ID. Location found - Fergus Falls, MN. All rock pieces are from one larger piece that I broke apart. I removed some matrix with a Dremel tool to reveal more detail, but the "body" of these creatures were left untouched and are smooth in texture. The first six images of larger specimen has unique features on both sides. The smaller additional specimen along with the separate unfinished rocks seem to be the same creature, just more of them.
  11. Lone Hunter

    Micro Bacculite?

    This is from Duck Creek formation in Tarrant county, not familiar with fossils from there so not sure what this is, looks very similar to a bacculite to me except for ridge running the length of it. Half cm long.
  12. This is about a 330 mya vampyropod, with soft body preservation, and an ancestor of octopuses. LINK TO ARTICLE
  13. Thomas1982

    20220316_145906

    From the album: Mahantango Formation

    Spyroceras
  14. It took some time, but thanks to Covid-19 (!! - see acknowledgements) its out now: A Systematic Study of upper Silurian (Ludfordian) Nautiloid Cephalopods from the Eggenfeld Section (Graz Palaeozoic, Styria, Austria) (pdf, external site) Here is my last visit to that site: Visiting some of the oldest fossils of Styria, Austria (Silurian orthocerids and brachiopods) - Fossil Hunting Trips - The Fossil Forum Best of all, some of my former specimens are pictured in that paper, especially some polished sections (see acknowledgements). Franz Bernhard
  15. Oxford clay, Peterborough Member, Jurassic, Callovian, Whittlesey in Cambridgeshire I collected this a few years ago, and I'm unclear whether it's a large cephalopod hook, or part of a fish, or something else entirely. Any assistance would be greatly appreciated.
  16. Looking for some info on this specimen from Eastern MO. Is this perhaps some sort of cephalopod impression partially replaced by calcite crystals? Thanks!
  17. Hi folks! I’m kind of stuck on this one. I presume this is a gastropod and not a cephalopod because of its small size (diameter around 2 cm). But what order, family, genus and species? Its found at Mt Billingen in Sweden, in a layer from middle Ordovician (middle to upper Darriwilian).
  18. Bringing Fossils to Life

    Spyroceras?

    Hi everyone! I was going through my Swatara Gap fossils when I came across this specimen, which I had originally thought to be coral. However, it looks similar to pictures of Spyroceras I've seen. Can anyone help? The first picture shows the texture, the second picture is a cross section, and the third picture is an imprint on the other side of the rock that looks cephalopody.
  19. I_gotta_rock

    Belemnites

    From the album: Delaware Fossils

    Belemnitella americana showing internal molds. Upper Cretaceous Mt. Laurel Formation Delaware, USA It's not often one finds an internal mold of the guard where the internal texture is clearly visible. Although internal molds of other animals are common at this locality, any internal molds of belemnites are few and far between. Broken though it is, the lower specimen is one of my favorite belemnites.

    © c. 2022 Heather JM Siple

  20. Manticocerasman

    Bactrites sp.

    I've been cleaning up a few boxes with devonian fossils from the past few months and came around this nice little fellow. I cleaned him up and gave him a paraloid treatment to preserve the pyrite. It is a complete specimen of a Bactrites sp. from the Matagne shales ( Frasnian, late Devonian ) from Belgium, both phragmocone and body chamber are preserved. They are a little unusual, as the do not belong to the nautiloids as his first appearance might suggest but they have their own subclass and are considered to be the ancestors of the ammonids ( they have a ventral syphuncle like all
  21. historianmichael

    Nostoceras draconis

    From the album: C&D Canal Micro Fossils

  22. Hi, all. I collected this specimen in the New Point Stone quarry, near Napoleon, Ind. It's Silurian, and was found in the Massie Shale. But I can't seem to find any information about it, specifically, the genus or species. The experts to whom I reached out were stumped. Any ideas, ladies and gentlemen?
  23. Denis Arcand

    Very small cephalopod ?

    I found this on one of my hash plate, is it what I think it is, a very small cephalopod ?
  24. tombk

    Large cephalopod from Graf

    I was collecting isorthoceras cephalopods at Graf Iowa (Elgin Member of the Maquoketa Formation, upper Ordovician). I found one partial specimen that in cross-section is about 8-9 times larger than any other I’ve found there. This first pic is from the field. (Don’t worry, the next photos have a scale cube in them!) The large specimen is about 8.9 cm by 5 cm. You can see cross sections of the usual-size isorthoceras in the rock (filled and infilled), and they’re closer to 1 cm across. Unfortunately, the specimen is fairly fragile. I’ve already had t
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