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Sebaileyuk

Whitby fossil id

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Sebaileyuk

This is another fossil I found on the beach near Whitby a few years ago. 

 

I have a couple of ideas but don’t want to appear stupid given all the experts on this forum

F512DB24-2165-4EC4-ACD6-48458A55AEE3.jpeg

8B887CAF-A46B-4534-BF35-761428CECE1D.jpeg

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Sebaileyuk

Another pic

DCDBBA31-C92F-431F-B59F-06A66F9FEFB1.jpeg

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abyssunder

Maybe it's a cephalopod / ?ammonite showing the siphuncle in the middle.

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Rockwood

I'm going to have to see if I can find the information on the preservation bias toward siphuncles, but it does seem right, assuming there is one.  

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FossilsAnonymous
3 hours ago, Sebaileyuk said:

don’t want to appear stupid

Don't worry about that, we all started somewhere!

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hemipristis

+1 on orthocone cephalopod

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Sebaileyuk

Thank you so much everyone for your kindness and help. 

 

I was considering a straight nautilus for this. Seeing the answers on here though makes me realise how much there is to find out. Need to do some serious reading up. 

 

Thanks everyone. 

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FossilDAWG
3 hours ago, TqB said:

That's a really nice find for the area! I agree it's an orthoconic nautiloid with large siphuncle.

It's not actually an Ordovician/Silurian actinocerid but a Carboniferous pseudactinoceratid (a family of pseudorthocerid), quite likely Rayonnoceras  sp.  It's very similar to an actinocerid but is in a typical piece of Carboniferous limestone. There's no way to easily tell them apart without knowing the geology - you just don't get Ordovician and Silurian erratics around there. 

They occur sporadically in the Carboniferous rocks to the west and north, it makes my day when I come across one!

New info to me.  I was not aware of pseudactinoceratids.  Thanks so much!

 

Don

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TqB
3 hours ago, Sebaileyuk said:

I was considering a straight nautilus for this. Seeing the answers on here though makes me realise how much there is to find out. Need to do some serious reading up. 

Spot on then - to be pedantic, "Nautilus" is just the name of the modern genus, everything else is "nautiloid". It's a very rare find as an erratic - I don't actually recall seeing one there though they are to be expected. :)

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Shellseeker
4 hours ago, TqB said:

quite likely Rayonnoceras  sp.

I always go search for an artist rendition... Helps my memory.

  Rayonnoceras.jpg.8b455fde29127525f4f780a56828c923.jpg

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Sebaileyuk

Thank you very much for the correction. 

 

The artist rendition was very helpful too. Thanks. 

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Aurelius

Brilliant find.

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LiamL

Very cool find 

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I_gotta_rock
On 5/29/2019 at 5:42 PM, Sebaileyuk said:

This is another fossil I found on the beach near Whitby a few years ago. 

 

I have a couple of ideas but don’t want to appear stupid given all the experts on this forum

I'm a little late to the party, but remember, no one an know everything about fossils. The more anyone learns, the more they specialize. You may end up an expert in these, helping a paleobotanist with an odd find because this is not in their realm of experience.

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