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Was visiting a quarry in NW Ohio two weeks ago, and came across this gastropod. It's about 2" X 1.5" Had to do some research to identify it. Saw that not too many Platyceras dumosums have been discussed/presented on TFF.

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It's completely pyritized. Inside and out post-7762-0-26013300-1397779093_thumb.jpg

Here's a drawing of how they're thought to have looked

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Another view

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It also has some non-pyritized bryozoans (I think?) attached to the coil.

How does this occur?

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Edited by hrguy54
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This is a great example! They look like something from the home planet of the Clingons :)

I would guess that the snail's shell is chemically different from the bryozoan's structure, with the latter unlikely to pyritize.

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Fossildude19

Wow! Have not heard of or seen this before!

Thanks for posting it - great fossil.

Regards,

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Nice find! Heres one I found not long ago here in NY.

mikey

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Nice finds! Congrats! The bryozoan being on the first one is very cool. :)

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Fossildude19

Great Golden Gastropods! :)

Nice!

Thanks for posting them.

Regards,

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Excellent specimen. I have a NY specimen myself, but it is only a partial and not nearly so pretty.

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  • 6 years later...

I just completed prepping another of the pyrite Platyceras. Came from the same area as the others but was found in the last few years and has been sitting, waiting to be prepped. It's a bit bigger than a golf ball, as are the previous two.

IMG_0088.jpg

Edited by hrguy54
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Wow! I have never seen this topic, Platyceratids are super cool but these ones are just incredible!

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Fossildude19

Another great find! :envy:

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Very nice finds!!

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