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Strepsodus

Carboniferous amphibian limb bone?

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Strepsodus

Hi.  I found this in the British Coal Measures.  I think it is a limb bone.  Is it a limb bone?  If so, is it from a fish or an amphibian?

 

 

Thanks,

 

 

 

Daniel

 

 

image.thumb.jpg.c266e89141bc5f1d099d08581fc203ce.jpgimage.thumb.jpg.235a0ab329cc63658c0c5bbd66aeb9d7.jpg

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Fossildude19

Daniel,
Sure looks like one (amphibian bone)  to me, ... femur or humerus?  Not sure. 

Excellent find, though. 

Regards,

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fossilized6s

I agree with Tim. Very exciting find. Congratulations.

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Fossildude19

Some blown up shots:

 

image.jpg.4c5b2dc2fddba38b3a2c3d2a7d8fbc1f.jpg        image.jpg.418df309ca3e7010976b90c403606fcf.jpg

 

I suppose it is also possible that it is a finger bone, from a larger tetrapod.  :headscratch:

 

 

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Strepsodus
23 minutes ago, Fossildude19 said:

Daniel,
Sure looks like one (amphibian bone)  to me, ... femur or humerus?  Not sure. 

Excellent find, though. 

Regards,

 

20 minutes ago, fossilized6s said:

I agree with Tim. Very exciting find. Congratulations.

Hi.  Thanks for the replies.  Do you think Rhizodont limb bone can be ruled out?

 

 

 

Thanks,

 

 

 

 

 

 

Daniel

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fossilized6s

This looks like a femur of a creature that probably had well developed limbs, so that would rule Rhizodont. 

 

I would investigate Silvanerpeton or a similar species. 

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Strepsodus

Hi.  Thanks for your help.  Is this line in the middle near to the end only seen in more developed limbs?

 

Thanks,

 

 

 

Daniel

 

 

image.jpg.98f92d8103ebd92f310fab62ccf24b0f.jpg

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Fossildude19
6 minutes ago, Strepsodus said:

 

Hi.  Thanks for the replies.  Do you think Rhizodont limb bone can be ruled out?

Thanks,

Daniel

 

Daniel, 

 

Although I wouldn't completely rule out lobe finned fishes, I would lean more towards amphian on this one. 

Regards,

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fossilized6s

Your fossil looks so close to a ichthyostega femur it's scary. But these are from the Devonian. These creatures are thought to be the missing link from fish to Amphibians. And the evolution of the ball and socket joint gave these creatures a larger range of motion in their limbs to eventually walk, hop, run, etc. 

 

 

lobe-fin_fish_and_amphibians.gif

v17n2-tetrapods1.gif

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Strepsodus
27 minutes ago, Fossildude19 said:

 

Daniel, 

 

Although I wouldn't completely rule out lobe finned fishes, I would lean more towards amphian on this one. 

Regards,

 

6 minutes ago, fossilized6s said:

Your fossil looks so close to a ichthyostega femur it's scary. But these are from the Devonian. These creatures are thought to be the missing link from fish to Amphibians. And the evolution of the ball and socket joint gave these creatures a larger range of motion in their limbs to eventually walk, hop, run, etc. 

 

 

lobe-fin_fish_and_amphibians.gif

v17n2-tetrapods1.gif

Hi.  Thanks for the replies.  Does anyone know of anyone who may be able to give a certain ID?

 

 

Thanks,

 

 

 

Daniel

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Fossildude19

You could try to contact Dr. Jennifer Clack.  She has been responsive to other members with similar questions. :) 

Good luck. 

Tim

 

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Strepsodus
46 minutes ago, Fossildude19 said:

You could try to contact Dr. Jennifer Clack.  She has been responsive to other members with similar questions. :) 

Good luck. 

Tim

 

Thanks.  I'll let you know what she thinks it is.

 

 

Thanks,

 

 

 

 

Daniel

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doushantuo

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Strepsodus
14 minutes ago, doushantuo said:

 

11 minutes ago, doushantuo said:

 

5 minutes ago, doushantuo said:

Hi.  Those are very interesting- thanks.

 

 

 

Daniel

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doushantuo

Jarvik is a famous name,Strepsodus.

Although his views on tetrapod skull bone terminology is being debated

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Strepsodus
3 minutes ago, doushantuo said:

Jarvik is a famous name,Strepsodus.

Although his views on tetrapod skull bone terminology is being debated

Hi.  Thanks for your help.

 

 

 

Daniel

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doushantuo

Alas,the Silvanerpeton paper is paywalled.:angry:

Proterogyrinus limbs

pleibhl.jpg

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Strepsodus
24 minutes ago, doushantuo said:

Alas,the Silvanerpeton paper is paywalled.:angry:

Proterogyrinus limbs

pleibhl.jpg

 

18 minutes ago, doushantuo said:

 

12 minutes ago, doushantuo said:

Hi.  Those are very interesting- thanks.

 

 

Daniel

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Plax

you can sometimes receive paywalled papers as pdf from the authors. their contact information is in the abstract which is free access.

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