Possible Fossil Cephalopods For ID

Discussion in 'Cephalopod Fossils' started by Sea Urchin, Jul 11, 2012.

  1. Sea Urchin

    Sea Urchin Larval Mass Registered

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    Hi there! :smile:

    I had posted one of these finds on a fossil forum but didn't get a positive ID.. These
    are finds within nodules in a Pennsylvanian age site in Texas.. The smallest one
    just opened yesterday using freeze/thaw method and will be on the next post





     

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  2. Sea Urchin

    Sea Urchin Larval Mass Registered

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    Part 2 images

    These are the rest on the images that go with the last one on the previous post..

    If I didn't know that's shell I thought they might have been plant roots

    The pics aren't the greatest.. I shot them with my camera through a loupe.

    Thanks for looking
     

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  3. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Kevin should be along shortly :wink:
     
  4. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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    The bottom photo in post #2 looks like it may be an orthocone sticking out of an Ironstone Concetion.8-)

    The others look like fractured Ironstone concretions (link). We find these concretions out here in some black shales, they always fracture with those smooth wrinkly surfaces, hard to tell if they are fossils or not.
     
  5. Sea Urchin

    Sea Urchin Larval Mass Registered

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    Thanks for the link and the ID on the one in the second post..
     
  6. Pr0teusUnbound

    Pr0teusUnbound GPO Registered

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    bear in mind that im only an amateur, but i might be able to help.

    the third pic on your is interesting. the gentle v-shaped suture line looks a lot like the ventral surface of the nautiloid/ammonoid Bactrites. the second pic on your first post might be the nautiloid Spyroceras. ive never collected personally from Pennsylvanian deposits, so i could be dead wrong.
     
  7. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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    :welcome: to Tonmo Proteus...

    My eyes ain't what they used to be, could you help explain where you see a suture line? :old:
     
  8. Pr0teusUnbound

    Pr0teusUnbound GPO Registered

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    its on the part of the cephalopod thats outside the concretion. the area is out of focus, but you might see it in the larger image.
     
  9. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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    I think this is a damaged shell. Those are growth lines on the outside of the shell and not sutures. Whether it was damaged and repaired or damaged after death remains to be seen.
     

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    Terri likes this.

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