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gm8

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Reply with quote  #1 
Hi All, Newbie here.

found these at Charmouth a while ago. Any chance they might be something interesting? The larger one seems to have distinct line or break around the top. Any help would be much appreciated.

Thanks
G IMG_4257.jpg    IMG_4259.jpg  IMG_4260.jpg  IMG_4263.jpg  IMG_4264.jpg

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CurtKnap

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Reply with quote  #2 
Hi gm8 and welcome.

Not teeth, unfortunately, but worn belemnites, which are actually part of a squid-like creature. These are common fossils at Charmouth.

Try googling belemnite.

(the smallest thing in the first photo could possibly be tooth/bone in origin, but I can't see enough detail)
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gm8

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Reply with quote  #3 
Thanks for the info CurtKnap, much appreciated.

Gm8
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devonjem

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Reply with quote  #4 
The small thing in the first picture looks like a spine from an Eoderoceras ammonite- just a guess.
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TqB

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Reply with quote  #5 
Agree with both of those - the belemnite is actually quite a rare one, apparently a Coeloteuthis sp. (also known as Clastoteuthis which isn't currently officially valid though I believe it should be!).

The small one indeed looks like an Eteoderoceras spine.

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gm8

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Reply with quote  #6 
Fantastic info, thanks devonjem & TqB. I have googled all of those names and find it fascinating. Great forum.

G

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estwing

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Reply with quote  #7 
Is Eteoderoceras a synonym for Eoderoceras?
Or is one the subgenera of the other?
In which case, is it Eteoderoceras (Eoderoceras), or Eoderoceras (Eteoderoceras)?
Thanks for shedding some light on the subject...
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TqB

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Reply with quote  #8 
Quote:
Originally Posted by estwing
Is Eteoderoceras a synonym for Eoderoceras?
Or is one the subgenera of the other?
In which case, is it Eteoderoceras (Eoderoceras), or Eoderoceras (Eteoderoceras)?


The genus was revised in Murray Edmunds' 2009 Pal Soc monograph, A Revision of the Lower Jurassic Ammonite Genus Eoderoceras Spath and its Immediate Descendants and Other Relative 


( An excellent read if you're interested in ammonite evolution and resulting nomenclature.)
Eoderoceras is retained for the twin spined ones (E. bispinigerum being the type species). Eteoderoceras was erected for the unispinate forms such as E. armatum.

So this specimen could be from either but the unispinate forms are a lot more common!
 

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