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Patrick Hsieh

Profile picture of Patrick Hsieh

Patrick Hsieh

@patrick-hsieh
Los Angeles, CA
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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 1 day, 3 hours ago

    1 day, 3 hours ago
    1 day, 3 hours ago

    Its definitely an echinoid (class Echinoidea). Sand dollar (order Clypeasteroida) is a reasonable guess.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 1 week, 2 days ago

    1 week, 2 days ago
    1 week, 2 days ago

    Internal mold of a bivalve.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 1 week, 6 days ago

    1 week, 6 days ago
    1 week, 6 days ago

    Thanks for the additional pictures. I no longer believe that is a cephalopod. That is a Gryphaea oyster, also known as devil’s toenails.

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    Patrick Hsieh posted a new activity comment 2 weeks ago

    2 weeks ago
    2 weeks ago

    Oyster

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 weeks ago

    2 weeks ago
    2 weeks ago

    Probably part of a broken brachiopod shell. I say that because the center raised ridge looks like the fold, which corresponds to the sulcus in the opposite valve or the corresponding shell. A scale and views of the back and sides may help confirm that.

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    Patrick Hsieh posted a new activity comment 2 weeks ago

    2 weeks ago
    2 weeks ago

    Most likely a cephalopod such as a nautiloid or ammonoid. A scale such as a ruler and different views such as from the side is helpful.

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    Patrick Hsieh posted a new activity comment 2 weeks, 1 day ago

    2 weeks, 1 day ago
    2 weeks, 1 day ago

    I’m fairly confident that is a brachiopod. Do you have a locality where it was found?

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 3 weeks ago

    3 weeks ago
    3 weeks ago

    I would hazard Cosmopolitodus planus (Agassiz, 1856), but a locality where this came from is always helpful.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 1 month ago

    1 month ago
    1 month ago

    internal mold of a bivalve or a brachiopod.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 1 month ago

    1 month ago
    1 month ago

    Some of the larger pieces on the bottom look like oyster shells.

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  • Profile picture of Melissa Todd

    Melissa Todd and Profile picture of Patrick HsiehPatrick Hsieh are now friends 1 month, 1 week ago

    1 month, 1 week ago
    1 month, 1 week ago
  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 1 month, 3 weeks ago

    1 month, 3 weeks ago
    1 month, 3 weeks ago

    Compare with an internet search for “deer hoof core”

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months ago

    2 months ago
    2 months ago

    I would say it depends on how you found it. If you found it on the ground surface, it could have been transported there through many ways: broke off an outcrop and rolled down hill, broke off and was transported by a creek or river, or it was transported there by humans. In those cases, we don’t know exactly where it came from. If you don’t know…[Read more]

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months ago

    2 months ago
    2 months ago

    Flexicalymene ouzregui Destombes, 1966

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months, 1 week ago

    2 months, 1 week ago
    2 months, 1 week ago

    I concur with @corinne-daycross. I would go further and say this is Knightia eocaena Jordan, 1907. There are 2 species of Knightia commonly found in the Green River Formation of Wyoming. K. eocaena and K. alta. K. alta has a deeper belly.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months, 1 week ago

    2 months, 1 week ago
    2 months, 1 week ago

    Based on your location, it looks like the bedrock has been mapped to the Silurian Period. Orthocones, which are cephalopods, are consistent with that. You can check out this website for more information: https://silurian-reef.fieldmuseum.org/narrative/429

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months, 1 week ago

    2 months, 1 week ago
    2 months, 1 week ago

    My first impression is orthocone as @a-trilobite suggested. Locality info is always helpful (state, nearest city or town, and the name of the pond if you have it).

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months, 1 week ago

    2 months, 1 week ago
    2 months, 1 week ago

    @kara-freeman, @daniel-gonzalez This is a murex shell that has been weathered so that parts of it have broken off.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months, 2 weeks ago

    2 months, 2 weeks ago
    2 months, 2 weeks ago

    Not a mollusc, this is a decapod of the genus Thalassina.

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  • Profile picture of Patrick Hsieh

    Patrick Hsieh posted a new activity comment 2 months, 2 weeks ago

    2 months, 2 weeks ago
    2 months, 2 weeks ago

    Where was it found? I can’t stress enough how important the locality context is.

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Development of myFOSSIL is based upon work largely supported by the National Science Foundation under Grant No. DRL-1322725. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

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