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  1. Bringing Fossils to Life

    A reconstruction of the Mahantango Formation

    I just finished a reconstruction of the Mahantango ecosystem, based off of fossils I have found at corresponding sites. This certainly does not cover all species in this formation, but many of the most prominent (Sorry no Dipleura, haven't done that one yet). I recently learned about Striacoceras and re-identified many of my orthocerids as this obscure genus. Striacoceras is the brown orthocone in the background. I included two crinoid genera, (left to right) Ancyrocrinus and Botryocrinus. an Eldredgeops searches for prey. There are several Mucrospirifer brachiopods, some Orthonota bivalves, a
  2. 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.
  3. Bringing Fossils to Life

    Mahantango Ammonoids- the complete guide

    Here is the complete guide to the Mahantango ammonoids! Koenenites is only included because of two specimens (found by my friend and I) from Swatara Gap, which includes some Mahantango strata according to HynerpetonHunter. Tornoceras is the most common, Koenenites the rarest. Enjoy!
  4. After a lot of research, I made this family tree for all of Cephalopoda. I have posted major resources below. Dates and lots of other stuff: https://paleobiodb.org/#/ Mass Extinction events https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/end-ordovician-extinction/ https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/late-devonian-extinctions/ Ammonoid classification: https://www.researchgate.net/publication/292489944_Fossil_Focus_Ammonoids Extinction of the Goniatites: https://www.nationalgeographic.
  5. Fischcrazy

    Devonian (Givetian) Ammonoid ID Help

    I collected these last weekend from the Millboro Shale (Devonian: Givetian) in Highland County, Virginia, USA. I cant seem to identify these and not familiar with Ammonoid taxobases, not sure where to start. I did go through House, M.R., 1962, Observations on the Ammonoid Succession of the North American Devonian. House does cover the Millboro Shale but only lists occurrences of Sobolewia virginiana, Tornoceras uniangulare, Maenioceras sp. I dont have access to the Treatise part K so any help IDing these would be amazing!
  6. Bringing Fossils to Life

    Life reconstruction of the Ammonoid Koenenites

    Here's the reconstruction of Koenenites I promised. Koenenites was a Devonian ammonoid with a very compressed shell and sharp keel. It was designed for fast swimming and thanks to the shape of its suture, it could accelerate very quickly compared to the ammonoids around it without its cameral fluid sloshing around and shifting its center of gravity. Because of its evolute shell, it likely had a large hyponome, which goes with the shape of its shell. After looking at some pictures of Koenenites fossils from Michigan that may have preserved the Supercephalic Attachment Area, I arrived at the pro
  7. HynerpetonHunter

    Cephalopods I Own

    Michelinoceras sp., Swatara Gap, Devonian, Hamilton Group, Mahantango? Fm. Pennsylvania
  8. Howdy all, I did a bit of fossil hunting in Fayetteville AK over Thanksgiving, hitting the Mississippian age black shale the area is famous for, looking for goniatites and any other ammonoids or nautaloids I could find. These concretions were dug out of the lower unit shale and many of them were large, extending over 4ft in length, flat, with an oblong appearance. This was on the surface of a concretion and unfortunately was exposed to weathering and moisture. Not sure what that is. This little guy, it’s just provided for grins and not requesting an ID. It
  9. fossil_lover_2277

    Ammonoid, Foreknobs formation, Virginia, U.S.A., 2021

    From the album: Lando’s Fossil Collection

    Ammonoid in mudstone collected from Devonian Foreknobs formation sediments of the Jefferson National Forest near New Castle, VA.

    © Lando_Cal_4tw

  10. connorp

    Tiny Pennsylvanian Ammonoids

    Over the past year I've I found two tiny ammonoids from a site in the Carbondale Formation (Middle Pennsylvanian) of Illinois. Both measure approximately 5mm in diameter. The first specimen below showed no details of the exterior of the shell, which I believe are necessary in identifying these. This week I found a second specimen (maybe a different species) which does show the suture pattern. I'm hoping that this specimen is identifiable. Part Counterpart Does anyone recognize the species? Thanks!
  11. During an afternoon break I found a dozen or so promising concretions at an outcrop of Fayetteville shale. I'm thinking of going the freeze/thaw route as my history of hammering concretions is a but hit or miss. Curious as to the opinion of the forum on the best technique. Also, should I consider setting a couple aside and try to get whole fossils by remove the matrix? Thanks in advance.
  12. I took this photo of an ammonite fossil from the Late Cretaceous (Turonian) Ladd Formation of the Santa Ana Mountains in Orange County on display at the fossil collection inside the Lewis Center for Applied Sciences at Orange Coast College earlier this week
  13. cngodles

    Pennsylvanian Ammonoid

    I've had this specimen sitting in my "I'll get to it later" pile since last year. I've learned a lot about Cephalopods the past year, one of them being the differences between Nautiloids and Ammonoids. Upon re-inspection of this yesterday, I noticed the shell lines, but more importantly the suture lines caught my eye. These do exist here, but I would call them pretty rare to find. Not being an expert, I would consider Wellerites or Schistoceras, but these are based on quick comparisons using a Pennsylvanian Cephalopods of Ohio book I have. I started to clean up the rock using an ai
  14. Bonehunter

    Ammonoid Neoglyphioceras?

    Good evening everyone! Hope everyone is safe and healthy! Found this little (15mm) "ammonoid", that, to the best I can find is an example of a ridged ammonite Neoglyphioceras sp? (Unklesbay Common fossils of Missouri 1973). It was found in Pennsylvanian Winterset limestone in Kansas City. Is this a fair observation/guess? Thanks for any input! Bone
  15. Fossildude19

    Before and After prep.

    From the album: Fossildude's Purchased/Gift Fossils

    Lituites lii (Middle Ordovician ammonoid) before and after prep with air abrasives. The dolomite may have been a bit harsh, but some more matrix could be removed. I will have to take some time with baking soda to try to remove the excess. Not too bad, though.

    © © 2014 Tim Jones

  16. JulianoLPD

    Ammonite ID? Perisphinctes?

    Hi there guys, I got this ammonite as part of a set from Madagascar. I would like to know if this is a Perisphinctes. What caught my attention is that it seems to be more "larger" than the regular Perisphinctes I'm used to, at least. Let me know your thoughts.
  17. AstroRaptor56

    What is this ammonoid

    Here’s something I found in Michigan, it’s an ammonoid of some type but I thought it was too wide to be a goniatite, I could be wrong though.
  18. Hi there folks, Just need to know if I'm seeing this right. This is a piece from Madagascar I recently received. At first I didn't give much attention to it, but today i noticed the three small markings on the center of the piece. My question is: Would that be the reminiscent of the siphunculus of a Nautiloid specimen? Piece is from Madagascar. Thanks in advance, Juliano
  19. Enafter

    Fossil IDs (if possible)

    I like collecting fossils, but I usually am not sure what my finds are. Please, could you help me identify these fossils? I noted down some possibilities down below. 1 - could be a late Albian ammonite from central Serbia, but I am not entirely sure. Acquired in Serbia. 2 - Found at Southerndown, Wales. Could it be a tree root or something in the region of that? It has a cross-hatched pattern if you look closely. 3 & 4 - A shell I found at Penarth, Wales but I am not entirely sure what it is called. 5 - A bone I found in the mud at Tites Point, Severn, Glouceste
  20. Max-fossils

    Ammonoids from Carniol

    Hi everyone, Should've posted these a LOOONG time ago, but me being the lazy guy I am I forgot to do so till now Anyways, here goes. These were all found by me (/my family) in the Carniol clay banks in southeastern France. They are (heavily for some) pyritized. They are from the "Gargasian", Aptian stage, Cretaceous. Would love to hear the species name of them. Genus is still fantastic. Thoughts? Thanks in advance, Max #1:
  21. Abed H.

    Small ammonoid from Jordan

    I found this on the surface of the land next to my house. when you expose it to the sun, you can see crystals reflecting light
  22. Hello there! I visited @Malcolmt yesterday and he was nice enough to clean up some of my stuff from Penn Dixie (mid-Devonian), including the specimen below. I'm not exactly sure what it is, so I was hoping that someone out there will be able to help me with identifying this little guy, which I think is either a gastropod or a ammonoid - what do you think? These are all pictures of the same specimen, just from different angles. And it's pretty small - only 5mm across at its widest point. Maybe @DevonianDigger can help? Thanks for your help! M
  23. andreas

    Discotropites sp.

    From the album: alpine triassic Ammonoids

    Discotropites sp. from Triassic/upper Carnian "Hallstatt" limestone. Zone of Tropites subbullatus/Tuvalian II.
  24. Dpaul7

    Timor Ammonoid 1.JPG

    From the album: MY FOSSIL Collection - Dpaul7

    Ammonoid SITE LOCATION: Timor Permian (298.9-251.902 million years ago) Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Kingdom: Animalia Phylum: Mollusca Class: Cephalo
  25. Dpaul7

    Timor Ammonoid 1.JPG

    From the album: MY FOSSIL Collection - Dpaul7

    Ammonoid SITE LOCATION: Timor Permian (298.9-251.902 million years ago) Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Kingdom: Animalia Phylum: Mollusca Class: Cephalo
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