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Is this a sponge fossil?


Sir_Andrius

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Hello, my name is Andres. I found this in "La Pedrera beach" in Uruguay. At first I had no clue of what it was. I'm prone to think it is a sponge fossil, but would want help in this matter. I found it vaguely buried in the sand close to the shore. The sand of that beach is grainy and loaded with lots of shells of many mollusc species. If it is indeed a sponge fossil, what species it would be? Thanks in advance!

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Welcome to TFF!

It could be a sponge (not My field of interest), but it looks like a burrow cast to Me.

Wait for the sponge people to reply.

Tony

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

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19 minutes ago, ynot said:

Welcome to TFF!

It could be a sponge (not My field of interest), but it looks like a burrow cast to Me.

Wait for the sponge people to reply.

Tony

Beware of the Sponge people! BEWARE!

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I like Trilo-butts and I cannot lie.

 

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Just now, Sir_Andrius said:

what kind of bug could have done it? a worm? wasp?

Shrimp would be the most likely but could have been many things.

Tony

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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It COULD be a sponge,but a microscopical view would tell infinitely more.If diagenesis hasn't obliterated the microstructure,you might see spicules/desmas/scleres(=sponge needles).

Sponges have pores as well.

 

 

 

 

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6 hours ago, Sir_Andrius said:

what kind of bug could have done it? a worm? wasp?

I agree with Tony.

This was probably made by some sort of  decapod (perhaps a mud shrimp).

 

Regards,

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I agree with a burrow cast, i have some similar to yours.

 

Regards.

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"We only well see with the heart, the essential is invisible for the eyes."

 

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