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Greg.Wood

Arkona/Hungry Hollow mystery - possible fish vert?

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Greg.Wood

I found this at Hungry Hollow in Arkona, Ontario. Sadly I can't remember which formation I pulled it from but my understanding is they are all Devonian age.

 

It may just be a coral fragment but I've heard fish bones can be found. Any ideas?

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GeschWhat

Interesting :popcorn:

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Kane

I am siding with caution to think this is a coral fragment. This does look like Hungry Hollow Member of the Widder Fm. But this is an interesting piece!

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Malcolmt

Looks like coral to me

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Greg.Wood
2 hours ago, Peat Burns said:

I'm thinking this might be a holdfast, possibly bryozoan.  I have one nearly identical from the Silica formation.  When I first found it years ago, I thought it might be fishy, too.  I'll try to remember to dig it out tonight and post a pic.  Whatever it is, its morphology is distinct and conserved.

 

1 hour ago, Northern Sharks said:

Bryozoan holdfast was my first thought as well. Something like this http://www.crinus.info/otherfossils/data/rete.htm

Definitely see the resemblance, thanks guys!

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FossilDAWG

Placoderm fish plates, and fish (shark?) teeth such as Deltodus, can be found at Arkona.  However I believe the internal skeleton was cartilaginous, and at any rate I have never seen nor heard of fish vertebrae from Arkona or any of the Hamilton Group formations.

 

I believe your specimen is a coral or bryozoan holdfast.

 

Don

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abyssunder

I'm wondering if can't be a sponge.

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abyssunder

Can we have pictures of both specimens revealing how they look seen from the top?

 

Here is a hexactinellid sponge base/root:

 

gallery_11087_1603_29706.thumb.jpg.26ee4c45a183429e619db8bbd0369af4.jpg

picture from here

 

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Greg.Wood
On 12/8/2017 at 5:05 PM, abyssunder said:

Can we have pictures of both specimens revealing how they look seen from the top?

Here are a few different angles

_16C6634.JPG.4797e59cbcb0ae1f548f0029eaff531a.JPG_16C6637.JPG.29ed5215c13d2a789b2f8a157c770ee5.JPG_16C6635.JPG.70072ad1f34fe858a7380ca503da5567.JPG_16C6636.JPG.860b83ac407376672575dd5b804e3b5a.JPG

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Ludwigia

I'm also in the holdfast camp.

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abyssunder

The new images rule out the possibility of a sponge, I agree.
It's a nice find. Congrats! :)

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