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Elbert
Hello, @ Richard: since you have pictures of both the sea pen and the pinna, would you be so kind and place these pictures, next to each other, on this page?
Makes for better comparison...
Thanx!

greetings, Bert
the search is as valuable as the finds...
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deltapodus
fossil man 72 wrote:
richard , firstly are you sure its a pinna for starters lol , i have told bert i will go round there with you on sunday if you can make it no problem and sort the job once and for all , i am no book worm but probs spent more time collecting on the yorkshire coast than most over the last 5 years and have a few ammonites to show for my efforts and may be of a small help to you finding this illusive fossil , just message me on facebook if you want to meet up 
cheers
dave


Thanks for the offer - two pairs of eyes definitely better than one. Still not certain about Sunday - when would you need to know by?
Finally found bone[biggrin]
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deltapodus
Elbert wrote:
Hello, @ Richard: since you have pictures of both the sea pen and the pinna, would you be so kind and place these pictures, next to each other, on this page?
Makes for better comparison...
Thanx!

greetings, Bert


Bert, happy to do so but I only have the pics of your find are the ones you've posted on here.
Finally found bone[biggrin]
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Elbert
Hello, Richard, have a look in your in-box...

greetings, Bert
the search is as valuable as the finds...
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deltapodus
Elbert wrote:
Hello, @ Richard: since you have pictures of both the sea pen and the pinna, would you be so kind and place these pictures, next to each other, on this page?
Makes for better comparison...
Thanx!

greetings, Bert


As requested, pics side by side. Bert's find on the left, mine on the right - I've flipped the image of mine left to right so the long axis is aligned the same way. Should make for easier comparisons that way. Not to scale, by the way.

comparison.jpg 
Finally found bone[biggrin]
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Elbert
Hello, maybe it is sensible to make lists of resemblences and differences and please; join in...


- the general shape is similar,
- both pieces have curved lines coming out of a center line,



- one has no shell, the other lots,
- the sea pen has dots, the pinna has not,
- the sea pen has curviture in the leaf, the pinna is flat
- the curviture of the sea pen widens a lot more than is the case with the pinna`s,

If people can name more resemblences/ differences, please do so.

greetings, Bert
the search is as valuable as the finds...
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ThomasM
They look practically identical
Thomas

If you don't look, you won't find.
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Elbert
Hello Thomas, if you do not look, you do not find...
Sounds familiar?

greetings, Bert
the search is as valuable as the finds...
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YVIE
Is this also shell? Click image for larger version - Name: IMG_20170608_083529.jpg, Views: 61, Size: 282.11 KB
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Elbert
Hello, it surely looks like it... MEMO0008 (4).JPG  if it is...then you will have solved the riddle and it will be Pinna after all...
Well spotted!

Let`s await the extraction of it and then it will be certain...you can probably imagine I still have my doubts...
Thanks, greetings, Bert
the search is as valuable as the finds...
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YVIE
Love these challenges,better than a murder mystery.

Yvie
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deltapodus
YVIE wrote:
Is this also shell?


I wondered if that was a remnant of shell when I put the pics side-by-side, then decided maybe I was fooling myself.
I regret to say I can't make it this weekend - the ****** car just blown its exhaust and won't be fixed until Monday. [mad]  On the bright side, it's only a fortnight before the tides will be right at the weekend again. Just let me know if Mike gets there 1st, then I don't go searching for something that isn't there.
Finally found bone[biggrin]
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LarryS
Juvenile trilobite part?
You don't stop playing when you get old, you get old when you stop playing
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advantage
Not from the Jurassic Larry, Trilobites were long extinct prior to the Jurassic, which is the geological period the sediments that contain the specimen in question were deposited. Hope this helps.

Thanks
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deltapodus
After the 1st attempt where I failed to find it, the 2nd attempt where the damned car got in the way, I'm off again to Mulgrave this Sunday. Let's hope it's 3rd time lucky. I'll update you all on Monday - I have a feeling I'll just want to flop Sunday when I'm back.
Finally found bone[biggrin]
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deltapodus
Mulgrave was very wet and muddy yesterday - I was the only person in Brackenberry, although I did meet a Dutch couple in Rosedale who know of you, Bert. Despite having some very helpful photos, I regret to report total failure - too much sand and seaweed. However, I will give it another go when the colder weather causes the weed to die back.
Finally found bone[biggrin]
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Elbert

Hello, thanks for trying. We'll get there in the end, I'm sure of it. Did you have any other finds? 

My dutch friend Walter, who's over there right now, has told me there's lots to be found at Port Mulgrave at the moment. 

Greetings, Bert

the search is as valuable as the finds...
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deltapodus
Funny, I met a Dutch couple on the beach in Rosedale - the lady knows of you, Bert, but has never met you - so she said.
Did find some nice bits - partial Harpo and Pleuroceras, the usual D.commune and some nice D. tenuicostatum, including a multi that needs prepping. I say tenuicostatum, but one of them keeps making me think it's not tenuicostatum. Can't put my finger on why, though, just a gut feeling. I will post pics later.
Finally found bone[biggrin]
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deltapodus
Just been browsing through some old pics taken in Brackenberry in 2015. Are my eyes fooling me or does the close-up resemble Bert's original photo? 1st pic is a close-up, the 2nd shows the full block -  the close-up is from the bottom right corner of the full block.


PICT1274.jpg   

PICT1273.jpg
Finally found bone[biggrin]
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Elbert
Hello, interesting piece indeed; have you collected this block?
If so; are there dots on the middle of the ribbing?
On my mystery fossil there were not only dots, but polyps visible as well...

I have done some research on the sedimentation of these layers and they turn out to be at least partly tempestic in nature and formed in an oxygen low/ anoxic environment, wich would make the preservation of a seapen like creature well possible...

Also realized me I had seen a stem of , what I now know is a seapen, at Kettleness, in a bed on top of the main seam.

I shall return to the coast early april and hope to find both specimen and put this discussion finally to bed...with the help of NHMUK off course.

greetings, Bert
the search is as valuable as the finds...
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deltapodus
I left it - I didn't fancy climbing back up carrying that and I already had a rucksack full of ammos. That's why I always take a camera  - to bring home the fossils I can't carry.
Finally found bone[biggrin]
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Elbert
Hello, well, you can only carry what you can carry, but I sort of expected you to collect it because of the big aptychus on it...
Maybe we`ll find some new ones next month...

greetings, Bert
the search is as valuable as the finds...
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Becky dobson
I found this several years ago on whitby although I identified the ammonite as phylloceras there was also another fossil on the plate which I could not identify it looks similar to your discovery. Click image for larger version - Name: 15214561589951951994870.jpg, Views: 55, Size: 3.92 MB Click image for larger version - Name: 1521456195245108541265.jpg, Views: 58, Size: 3.40 MB Click image for larger version - Name: 1521456247824851619816.jpg, Views: 56, Size: 3.45 MB
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Elbert
Hello, I do not see much resemblance with the original mystery find, but it does look similar to an aptychi; perhaps Deltapodus knows wich species it belongs to.

greetings, Bert
the search is as valuable as the finds...
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Becky dobson
Brill thanks for the info bert:)
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ThomasM
It's not an aptychus, its a flattened bivalve probably Dacryomya ovum
Thomas

If you don't look, you won't find.
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Becky dobson
Brill thanks loads :)
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deltapodus
Definitely not an aptychus, not sure about Dacromya - it's bigger than all the specimens I have, but I'm no expert on bivalves. Bert, I'm still good for a week on Saturday.
Finally found bone[biggrin]
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Elbert
Hello, right! let us keep it that way and we will see each other Saturday after next.
Really looking forward to this trip...

greetings, Bert
the search is as valuable as the finds...
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Elbert
Hello again; @ Becky: your little round fossil is probably one of a brachiopod called Discinisca sp.

greetings, Bert
the search is as valuable as the finds...
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Becky dobson
Brill thanks elbert
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Chalkers
I saw a few of these impressions (?) while in Devon and thought back to this post - not sure if it was ever answered but thought the resemblance was there anyway.

20180430_121636.jpg  

  



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Elbert
Hello,this resembles somewhat the shape of a seapen, but looking at the matrix I suspect this was a hard shelled animal like a coral or bryozoan.

greetings, Bert
the search is as valuable as the finds...
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