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  1. Lucid_Bot

    Carboniferous Cephalopod?

    Found this critter in what I believe to be the Brush Creek Limestone. It is Carboniferous (Pennsylvanian), Glenshaw Formation, and looks like a nautilus to me, so I'd guess Solenochilus. Thanks for the help.
  2. Tidgy's Dad

    Adam's Early / Lower Devonian

    The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these g
  3. I found this cephalopod at the Lost Creek spillway site neat Jacksboro Texas. It's from the Finis Shale, Graham Formation, Upper Pennsylvanian. The largest dimension is 16 mm. It seems to be a replacement fossil so no sutures are showing and I don't know of any similar goniatites so that suggests a coiling nautiloid. The only thing I know of with a trapezoidal whorl cross-section like this is a Titanooceras and T. ponderosum has been found there but of course they are huge so it would have to be close to the protoconch. There is an off-center ridge going along the venter and the shell thickens
  4. ClydeElledge

    Cephalopod in Limestone

    Hello. this one I found as part of fill on a dirt road in Illinois near the Mazon Creek area as I was looking for concretions. Part of the fossil was covered by a "hood" of limestone that I ground off with my dremel tool. I think this actually saved it from being really torn up on the road.
  5. I was in Milwaukee for a concert last weekend and I decided that I should revisit the local natural history museum while I was there. The Milwaukee Public Museum was a childhood favorite of mine- it honestly left a stronger impression on me than the Field Museum, and there is one main reason for that: their incredible life-size reconstructions of prehistoric life. So that is where my focus for this report will be. The fossils on display were mostly casts, and nothing stood out to me as particularly notable. Near the entrance, the museum had a diorama showing paleontologists

    Lechites comanchensis

    From the album: Pawpaw Formation

    Lechites comanchensis, Tarrant Co. Albian, Cretaceous Dec, 2022

    Mariella worthensis

    From the album: Pawpaw Formation

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

    Scaphites hilli

    From the album: Pawpaw Formation

    Scaphites hilli, Tarrant Co. Albian, Cretaceous Dec, 2022
  9. Jan Lester

    Cephalopod or not?

    I’ve had this forever, I think I found it in Middle TN. I initially thought it was a cephalopod, but I know more now, and I don’t see any septum(s). What say ye? Thanks!
  10. connorp

    Iowa Devonian Trip

    A couple months ago I took a trip to collect in the Middle Devonian of Iowa. It was a pretty good trip. I found some nice stuff and chatted with some very nice folks. Here are a couple of my finds. A partial ptyctodont tooth plate A neat sponge. I believe the genus is Astraeospongia but please correct me if I'm wrong. I was told these are rare from this area. A partial nautiloid And a partial Eldredgeops norwoodensis
  11. Bringing Fossils to Life

    Unknown fossils from the Coburn Formation

    Recently I went fossil hunting along a road cut revealing some of the Coburn Formation, latest Ordovician. I was stunned to find that so much of the ecosystem was made up of only Trilobites and Cephalopods. I found trilobites such as Isotelus and Cryptolithus (First picture). My find of the day was a large, very heavy plate of rock that preserves different parts of large Isotelus gigas from multiple individuals, and the circular cross-section of a small cephalopod (Second picture). However, I'm having trouble identifying these cephalopods. In the very few that preserve the outer sell, faint s
  12. I had brought home a piece of Galena/ Ordovician matrix that had some unidentifiable critters hidden in the rock. Time was taken to extract what I am sure is a cephalopod from the matrix. Haven hunted this formation for years, I can honestly say this is the first cephalopod found exhibiting its curved features discovered by me. Attempts to ID the fossil have been fruitless, so I am asking for help! The fossil fractured during its prep revealing what I see as a siphuncle. Here is the repaired specimen:
  13. dolevfab

    Cephalopod Shell Color!

    Hello all! Recently I have been obsessed with cephalopods and realized there is a real lack of reconstructions of the color patterns on extinct nautiloids and ammonites! This led me to compile a list of known fossil color patterns on cephalopods. After a year of on and off research, I found about 90 species of cephalopods retaining official or undescribed, original patterning on their shells. These are the first 15 species on my list. The color markings are based both on descriptions and photographs of the fossil material. The shades of the markings are based on the fossils, bu
  14. Tales From the Shale

    Graf Iowa Score

    State: Iowa Location: Graf Period: Ordovician Cruised over to Iowa for the first time in years last weekend. I went to observe and scout the famous cephalopod beds in Graf. I have to say, it was everything I had hoped it would be. The wall in which the RC was located upon, was a few hundred meters in length, and contained a few layers, dominated by dolostone, limestone and towards the bottom, phosphatic shales. I ended up finding graptolites too, which I wanted to say were Orthograptus? However I didn't bother to keep any. These were most of my finds, minus the plate
  15. Last weekend I had the opportunity to collect in a quarry in southern Wisconsin. It appeared to cut through the Upper Ordovician Platteville, Decorah, and Galena Formations, although only the Platteville rocks were accessible. It was not the most productive trip but it was a new spot for me and I had a good time. Here's a site shot plus a couple photos of large hash plates I did not collect. The quarry was swarming with these baby frogs – I easily saw several hundred. Here are the finds I kept. Eoleperditia fabulites - gia
  16. Manticocerasman

    Middle Devonian cephalopod prep.

    Last weekend we made a fieldtrip with the “CGH” ( Cercle geologique du Hainaut ) to the quarry “La Couvinoise” , the quarry happens to be in Couvin :p Here the deposits are middle Devonian: Eifelian and Givetian, so a bit older than the locations we usually prospect. The best part for the fossils are the Eifelian deposits, but sadly those layers are no longer in exploitation. However, due to the drought and the low water level we had access to a small but promising scree pile. Here we found a fragmented nautiloid, but the centre of the specimen seemed to be still in the matrix.
  17. MattReady


    Hello, I’m not very good at this but I was looking for frogs with the kids and found this. I think it is a cephalopod. I found it near Lion’s Head, Ontario, Canada. It is 14-15” in length. Please let me know if this is what it is and approximate age range. Thanks, Matt
  18. SilurianSalamander

    Gastropod and cephalopod?

    Found on a railroad track with other Paleozoic fossils
  19. I recently went to the famous St. Leon roadcut for the third time. The previous two times were more exploratory with few good finds to speak of, especially in regards to trilobites. I had a much more fruitful time this trip, including 2 complete rollers and 2 and a half prone flexis (my sister found a gorgeous one). I also came across this plate, where I saw the fossil in the bottom middle that is the subject of this post. At first I thought it was part of a coiled cephalopod, which I hadn't found at this site before. The other fossil, that I'm fairly certain to be a ce
  20. Denis Arcand

    Cephalopod ?

    I found these Ordovician fossils in the Nicolet River formation, could it be cephalopod related?
  21. 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.
  22. 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
  23. 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
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