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  1. oilshale

    Brachiopod from Bear Gulch - ID?

    Does anyone have any idea what kind of brachiopod this could be? I'm sure we can't identify the species, but maybe the family or even the genus? Carboniferous Serpukhovian Bear Gulch Montana
  2. I recently found this rather good (for the area) and rare goniatite, probably Girtyoceras sp. The innermost half of the living chamber has a mass of small rods which a few knowledgeable friends have suggested are faecal pellets from something that took up residence. It's in an ironstone nodule from a Brigantian (U. Mississippian) shale in Co. Durham, N.E. England. Fairly shallow water, with a diverse fauna of brachiopods, bivalves, bryozoa, small corals, crinoids etc., often broken up. I haven't seen any arthropods apart from small Paladin trilobites which are quite
  3. A few years ago I picked up an old paleontological publication from a University of Chicago used book sale and one of the sites described looked interesting. I finally got around to visiting the site last week, a good 5+ hour drive. It was completely overgrown so had to hack my way to the exposure. Middle Mississippian rocks. After about three hours of careful work I came across some Griffithides skeletal elements buried in foraminifera matrix. I also found this nice calcite crystal that fluoresces pink u
  4. Spent the day at the famous old cut in Sulphur, Indiana yesterday, and while I didn’t come away with a Mississippian shark tooth, I’m wondering if other parts of these animals preserved? This piece is shiny black like coal, about an inch long, is definitely fossilized, and was found in the Big Clifty formation. Anyone here an expert on Carboniferous sharks or has found anything similar?
  5. Spring is almost upon the folks of Minnesota. There is still a bit of frost in the ground so 2022 collecting will soon begin. Until then, it is fossil ID time. This one is from Burlington, Iowa, the Burlington Formation, Mississippian. I have been looking at this one for a long time. Is it one of those predators of Burlington crinoids?? Is it a monoplacophoran? Species if so?
  6. I found these several geodized Mississippian marine fossils in southern Indiana. They may not all be hollow with quartz crystals inside, but many are. The fossils usually balloon in size in the geode-forming process. Here's 2 sides of a crinoid calyx...
  7. Took a day trip to Mississippian subperiod sites in West Virginia, with exposures that represent environments ranging from shallow marine to mudflats (reflecting periods of ocean transgression and regression). Of course there were brachiopods; the one photo of a brach below shows pink/light red coloration, and I've also posted this in the General Discussion section under "Fossil Shells with Color Patterns." I've never before found a brachiopod with shell coloration. There's also a photo of a sea pen (Pennatulacea, only right side is well exposed). And there is anoth
  8. Back in April of last year I started a new job based in Texas. I had planned to work remotely until we returned to the office and then make a road trip down to Texas that would involve making several fossil pit stops along the way. When the time came for my move to Texas, my road trip unfortunately coincided with Hurricane Ida and I had to sadly scrap all of my plans and simply hightail it through the Gulf Coast to avoid the storm. Fortunately though I was given off from work the week between Christmas and New Years and I was even more determined to not let my research go to waste. The delay i
  9. Cladodus and Stethacanthus are more typical of modern day shark teeth. As can be seen, the tips are not always present, some destroyed in prep, but many tips severed prior to fossilization. Cladodus possesses a straight shaft while Stethacantus is S shaped.
  10. Continuing on with Burlington fish teeth, the next set of photos will feature Orodus.
  11. The next Burlington teeth found this summer to have been termed Deltodus. My ability to differentiate Deltodus from Sandalodus, Helodus (small), and Psammodus is nonexistent. So even though labels say Deltodus, the true identity of some may be the other three genuses. I am open to any suggestions that veer away from a Deltodus ID. Like Chomatodus, Deltodus is a Chondrichthyan. There seems to be 2 general physical types. Blacker teeth seem to be larger and have smaller pores. Lighter colored teeth seem to be smaller and have larger pores. Is this a way to differentiate types??
  12. Chomatodus will be today's fish of the day. It is a Petalodont, similar to a modern day Ghost Shark. My understanding is that a fused upper jaw leaves Chomatodus as "shark like", not a true shark. From my experience its teeth are the most frequently found in the Burlington Formation.
  13. minnbuckeye

    Mississippian Fish Teeth #1

    Every year, I take some time out to collect the Burlington Formation (Mississippian) of SE Iowa. It is about 70 ft thick in the area I hunt and the limestone is a coarse-grained rock made up mostly of crinoidal debris. Usually, my goal when visiting is to find nice examples of crinoids and brachiopods. But lately, I have taken interest in the primitive shark teeth that exist in the upper few feet of the Cedar Fork Member of the Burlington. So late summer, I threw five 25 lb rocks containing evidence of Chondrichthyan teeth into the back of my pickup to process this winter. Here is an example o
  14. Here's a simple looking crinoid I'd like identified from the Edwardsville Formation. It's the crinoid in the center of the photograph. Two non-branching arms spring from each radial. The crown (calyx and arms exclusive of the stem) is about 5 cm long.
  15. minnbuckeye

    Chondrichthyan Teeth Unknowns

    I am in the process of identifying the Chondrichthyan teeth that I have been extracting from Burlington Limestone collected this summer. Here are my most confusing teeth that hopefully can receive identification from our forum experts. 1. 2. 3. Possibly a dermal denticle instead of a tooth? 4. 5 .
  16. historianmichael

    Alabama Mississippian Brachiopod ID Help

    Over the winter holidays I visited a couple of exposures of the Mississippian (Chesterian) Bangor Limestone in Alabama. I found a ton of really cool fossils, including a number of brachiopods. I was able to identify the vast majority of the brachiopods I found, but I struggled to identify the following. Does anyone recognize them? #3 and #4 look to me to be Composita sp. but the only species of Composita from the Bangor Limestone that I saw is Composita subquadrata and these did not seem to match. Any help would be greatly appreciated! #1 #2 #3
  17. minnbuckeye

    Mississippian unknowns

    While uncovering chondrichthyan teeth from the Burlington fish layer, I have come upon many things I can not identify. In general, the only items having a dark color in this light colored matrix are fish parts. So my assumption is that they are fish oriented...... Here are some examples of items found that are likely not fish teeth. coprolites? Dermal denticles? Just taking stabs in the dark! @Coco, don't pick on me since my measuring stick is not seen well. I will add specimen size to each for you! 1. 2.0 by 1.2 cm 2. 1.5 by 2 cm 3. .8cm
  18. Doug Von Gausig

    Mississippian Isopod?

    I run across these guys frequently in the Mississippian Redwall Limestones around Arizona's Verde Valley. They are generally accompanied by lots of Crinoids and solitary Rugose Corals. They're always this oval shape with segmented structure. They look like an isopod, to me, but could be some other crustacean. Any help out there for the identification of these "bugs?"
  19. These are two specimens I have found that I can’t confidently identify. I don’t know exactly where they are from but the sedimentary rock they are preserved in is likely from the Mississippian. I live in Northeast Alabama where there are quarries that extract shale and limestone from the Mississippian. Since I don’t know the exact locality they came from I cannot provide an exact time period. One is a white, wedge shaped fossil that I speculate might be a leaf. The other I am unsure of if it is even a fossil but it appears to be a fish, but it could just be crystals that formed in
  20. oilshale

    Discoserra pectinodon LUND, 2000

    Taxonomy from Lund 2000. Diagnosis for the genus Discoserra from Lund 2000, p. 180: "Teeth of the premaxilla, maxilla and dentary long, thin, and styliform. Posterior end of maxilla does not extend back to level of anterior margin of orbit. Parietals excluded from contact in dorsal midline by postrostral 2, which contacts supraoccipital. No transverse supratemporal commissure in supraoccipital. Two rows of paired bones over orbit. One to three interopercular bones; two to three small postspiraculars and a presupracleithrum. Branchiostegals very variable in size, number and shape. Dorsal r
  21. On my way home from Georgia today I decided to make a short stop at the Vienna, Illinois roadcut that is right off of I-24. The weather was nice, a balmy 52 degrees and I was out collecting without a jacket. I decided to stop for 20 minutes and see how many blastoids that I could find, but alas, I only found a small one. I did find the usual pieces that are found at the Mississippian roadcut- blastoid, brachiopods, horn coral, a crinoid basal plates, bryozoan, including Archimedes screw and a number of hash plates. I
  22. BLT

    Is This A Crab Claw?

    Hello, I’m hoping someone can tell me whether or not this is a crab pincer? If not, what could it be? I found it in Alabama on the Tennessee River. (Mississippian) Thanks!
  23. BLT

    Is This A Type Of Coral?

    I’m hoping someone can identify this for me. I found it in the Tennessee River. (Mississippian/Tuscumbia Limestone) Thanks!
  24. BLT

    Identification Request

    Can anyone tell me what is protruding from this small rock? Is it some type of coral? I found it by the Tennessee River. (Mississippian/Tuscumbia Limestone) Thanks!
  25. Hello, I found this small rock on the Tennessee River. (Mississippian/Tuscumbia Limestone) I’m hoping someone can tell me what all is in it. Thanks!
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