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Rosco

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Reply with quote  #1 
Managed to get quite a few nice sized severnichthys teeth from the last few trips to Aust, including a few around a cm long

DSCF1623.jpg DSCF1624.jpg DSCF1625.jpg 
DSCF1626.jpg DSCF1628.jpg DSCF1628.jpg DSCF1627.jpg DSCF1629.jpg DSCF1630.jpg 
 

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Gandalf the White

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Reply with quote  #2 
Many look like Saurichthys acuminatus teeth
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Rosco

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Reply with quote  #3 
very interesting. Looks like I might have pigeon-holed the lot as severnichthys 😉

What are the differences between severnichthys and Saurichthys teeth?

Cheers
Ross
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Dirty Pete

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Reply with quote  #4 
Hi Rosco,

Nice collection of teeth you've got there. You might be interested in this:
P4030002_01.jpg 
  
A significant chunk of Severnichthys jaw I found a few years ago. This fish seems to have had a tooth to cover every eventuality.

Cheers

Pete

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Gandalf the White

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Reply with quote  #5 
Beautiful find Pete!!!
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Gandalf the White

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Reply with quote  #6 
Just wandering how I should go about preparing this chunck of bone bed.

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Rosco

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Reply with quote  #7 
Thats lovely Pete. Do you display it or have it locked away safely?
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Rosco

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Reply with quote  #8 
So I'm keen to know, the differences between severnichthys and Saurichthys teeth?

Cheers
Ross
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Gandalf the White

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Reply with quote  #9 
Honestly I am not sure.
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Dirty Pete

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Reply with quote  #10 
I think they are synonyms.
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Rosco

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Reply with quote  #11 
They appear to be quite different fish, so the interweb tells me
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Dirty Pete

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Reply with quote  #12 
We're talking teeth here not whole fish. According to (GWStorrs 1994); representative teeth of Severnichthys acuminatus include teeth historically known as Saurichthys acuminatus, Saurichthys longidens and labyrinthodontian. All very confusing. Let me know if there's a more modern interpretation.

I display the jaw next to this:
PA170017.jpg 
A big Ceratodus latissimus with attached bone...

Cheers

Pete


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Rosco

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Reply with quote  #13 
Yes quite confusing. Thanks for that though (and GWStorrs) 😊

Very impressive display
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P King Chef

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Reply with quote  #14 
@ Dirty Pete.

Were those cracks in your tooth plate when you found it or has it dried out a bit?

BTW Saurichthys I believe is a name no longer in use (not by me any way).

Here's a couple of mine.
SJaw01.jpg jaw with teeth (shark or fish).jpg   


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Pete

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Dirty Pete

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Reply with quote  #15 
Hi Pete,

The photo's from 2012 so the cracks were there when I found it. I was pondering why I've never seen any of the typical Severnichthys teeth (as displayed by Rosco above) attached to a Severnichthys jaw, just the big tusk like teeth and the needle like teeth evident in the jaw of mine above. Has anyone got an example of these teeth attached to anything jawlike?

Pete
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Dirty Pete

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Reply with quote  #16 
More examples of bits of jaw but no sign of the ubiquitous teeth...Am I missing something?

IMG_0084.jpg 
IMG_0514.jpg 
P6110011.jpg 
Pete.




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P King Chef

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Reply with quote  #17 
Hi Pete, in my first photo just to the left is a typical Severnichthys tooth on a small piece of matrix, I left it there during prep as I thought it might be associated and not just a random tooth.
On further reflection I've not noticed any sockets small enough to accommodate these teeth.


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Dirty Pete

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Reply with quote  #18 
Here's a pic of a Severnichthys jaw from Westbury Garden Cliff (PL 27 Fossils of the Rheatian Penarth Group):

IMG_1691.jpg 
The tips of the large teeth in the Westbury jaw look like tooth #10. The two teeth on the left have already lost their tips. Maybe this is the source of tooth type #10 often found isolated at Aust. Would be nice to get a closer view of this jaw but can't find any useful reference to it on the net. 

Pete

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P King Chef

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Reply with quote  #19 
To muddy the water even further Pete, have a look for Birgeria!
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Pete

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Dirty Pete

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Reply with quote  #20 
See what you mean Pete, spotted the exact same jaw named as Severnichthys in the book described as Birgeria on the net.
(Admittedly the other way round and upside down but I dont think that warrants a different name).

osteichthyans-birgeria-upper-jaw-9488581.jpg 
Some anorak at Bristol Uni needs to do a PhD thesis on this and sort this confusing mess out for us.

Cheers

Pete.


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