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Sat, Apr. 26th, 2008, 12:30 pm
ian_morgan:

Hello everyone!

I'm a palaeontology student in Portsmouth, UK. Recently I visited a locality in SW england called Aust cliff. It represents a marine transgression in the upper triassic (the rhaetian). There are several "bone beds" within the expose. The bone beds are known to contain fragmentary remains of marine reptiles, fish, and even dinosaurs.

On my trip I did indeed find some bone. Me and my tutor agree that the texture is reptilian, but cant seem to connect it to a particular animal, or shed much light on which part of the skeleton it may come from .

Here is a picture:



If anyone has any ideas I would be very pleased to hear them! Thanks

One observation that may not come across well in the photo is that it does appear to be rather thin....maybe no more that 5mm or so, although I will have to prepare it more to know exactly.

thanks again!

Sat, Apr. 26th, 2008 01:27 pm (UTC)
crumpetsfortea

It's a vertebra ... it's really beat up, so you'd have to prep it out for better markers as to its position on the body. Best guess is placodont -- I can tell you that it's probably not archosaur.

Sat, Apr. 26th, 2008 01:55 pm (UTC)
ian_morgan

Oh thanks a lot....that would be in line with some of the things my lecturer was saying. There are some really hard bits in the matrix, so preparation has started getting quite fiddly. I shall keep what you have said in mind though

cheers

Sat, Apr. 26th, 2008 02:23 pm (UTC)
dissident

I agree, it's definitely a vertebrae.

Sat, Apr. 26th, 2008 09:19 pm (UTC)
crumpetsfortea

Hm, I lied to you -- it's not a placodont, because they have amphicoelous verts, which definitely doesn't seem to be the case. I'm kinda stuck on it, actually. I can tell you it's probably not nothosaur, plesiosaur or icthyosaur. Could be a lepidosaur, maaaaaaybe? I don't think it's an archosaur of any kind, either. Murph. Its so hard to tell from this view, too. I might be able to give you a better guess once it's fully prepped, but, hell, I do terrestrial Triassic, so I'm not guaranteeing anything. :D

Edited at 2008-04-26 09:24 pm (UTC)

Sun, Apr. 27th, 2008 09:06 pm (UTC)
neutrino_cannon

I'm pretty sure I'm wrong, but my brain wants to see it as a hockey-puck shaped ichthyosaur vertebra.