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Marine reptile paddle bones?


JohnBrewer

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JohnBrewer

Hi folks

I've been digging through a few lumps of rock I collected a couple of years ago from Aust, Gloucestershire, UK which is rich in plesiosaur stuff among other things. I found these two pieces (three now :/ ) which were touching. I'm guessing they're plesi paddle bones. Am I right?

Thanks

John

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JohnBrewer

Btw scale is 1cm not 8cm!

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Fossildude19

Very neat finds, John! Well done.

Not familiar with plesiosaur material, so, unfortunately, I can't help there.

Maybe someone more local will weigh in.

Thanks for posting the mystery here, though. :)

Regards,

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I can't say much about the first one, but you may be right on the second bone. Plesiosaur finger bones tend to be hourglass shaped, but all the ones I have seen are longer than this.

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I'd say that's what they probably are. At least 2 & 3. Can't quite figure out the first one though. I also agree with JP. They are longer generally, but maybe that's from a juvenile. It's not a vertebra at any rate.

Edited by Ludwigia
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Mike from North Queensland

Comparing your specimens to the Australian material I have seen, the first photo definately has that plesiosaur paddle look to it.

With the size it would have to be a new born so that could explain the stubby phalanges but species is more likely.

Mike D'Arcy

Edited by Mike from North Queensland
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I wonder whether the "puck" mightn't be a metapoidal or mesopoidal?

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Welsh Wizard

Hi John

have you got an end on pic of the first photo. It may be an late triassic ichthyosaur humerus or femur rather than a plesiosaur paddle.

I'm not sure about the other two. They sorta look plesiosaur but they don't as well. Do either of them have little holes in them?

Regards

Nick

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Hi John,

Photo's 2 and 3 look distinctly more like Plesiosaur vertebrae. As I'm sure I can see the remnants of a neural arch facet.

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JohnBrewer

Hi John

have you got an end on pic of the first photo. It may be an late triassic ichthyosaur humerus or femur rather than a plesiosaur paddle.

I'm not sure about the other two. They sorta look plesiosaur but they don't as well. Do either of them have little holes in them?

Regards

Nick

Hi Nick

I've now managed to take some images

With the other circular bone, there are no holes I can see and it is in fair condition unlike the paddle shaped bone. The circular bone doesn't look like any of the plesi verts I have, not that I've got a stack and I've not got any from the tip of the tail if that's where it might come from.

Darren, what part do you think shows evidence of a neural arch? I'm not 100% sure of what you mean. I could take more images if that would help.

Hoping it's a juvenile, that would be cool.

Cheers

John

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Edited by JohnBrewer
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Hi John,

Photo 2 is very similar to the Plesiosaur vertebrae in this picture ( 1 ).Although the facets on yours are quite water worn.

Here's a picture ( 2 ) of a juvenile neural arch with spine.This sits on top of the curved shape facets.

Hope this helps.

( 1 )

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( 2 )

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JohnBrewer

Thanks Daren, I understand now. Are those plesi bits from your collection? They look fabulous.

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Hi John,

No problem at all. Luckily when you took the photo I think you subconsciously picked out the tell tale feature to identify the bone.

There not my Plesiosaur bones I'm afraid but I have many with the same characteristics such as this one below.

post-13364-0-28333100-1463866903_thumb.jpg

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Mike from North Queensland

John

The more I look at the initial post the more I think your larger piece from your initial post is part of a vertebrae.

I also agree with the others the other piece from the initial post looks like a small vertebrae

Mike D'Arcy

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Welsh Wizard

Hi John

Thanks for the additional photos but it is hard to tell with bone pieces from Aust.

Defo two verts, but the other piece I'm still not sure

Nick

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JohnBrewer

Thanks again everyone.

I think I should have be clearer with my photos and description tho:

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This is one piece broken unfortunately. The part sticking out on the top right is another separate piece of bone.

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These are the two parts which were joined together in the first place, it's the same bone as in the first image. It was the tear drop shap that made me think it might be a paddle bone.

Do you guys think the vert is from a juvenile or could it be the very tip of an adult tail or is it to difficult to ascertain?

I love Aust bone bed, I pick up the chunky bits other have left behind, amazing what can be found sometimes:)

Edited by JohnBrewer
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JohnBrewer

The two bottom images are not to scale. If you turn around the bottom image 180 degrees it joins the top of the image in the middle

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