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Id A Mammal Toe Bone


Shellseeker

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Out on a "prospecting hunt" today with Miatria. She is good at selecting non-obvious locations. Finding some isolated bigger material, including a 3.5 inch partial Meg (which made me hope for more) and an Astragalus 2.5 inches (I'm thinking Equus).

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However the ID I am requesting is for this well fossilized almost perfect toe bone, just over 3 inches.

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I am amazed at the preservation. Hardly looks like a Peace River bone.

The White Queen  ".... in her youth she could believe "six impossible things before breakfast"

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The astragalus belongs to an artiodactyl. I need to see the other side to distinguish it from Odocoileus and Platygonus. The finger bone is an equus proximal phalanx. Nice preservation and finds!

Daniel

Edit: I took a measurement. Odocoileus was 3.8cm and Platygonus was 4.0 cm. Both much smaller than 2.5 in. I would have to tentatively change my answer, I think it belongs to one of the camelids. I measured one of mine which I was told was P. mirifica, and it was 2.5 inches. Sorry for the mix up. Any camel experts out there?

Edited by calhounensis
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Shell, I'm having trouble seeing your astragalus as 2.5 inches in length - as I scale the picture, I get 1.3 to 1.5 inches - maybe it is the perspective. Can you take a picture, with a scale, "straight on" like Harry's pictures of astragali?

The plural of "anecdote" is not "evidence".

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Shell, I'm having trouble seeing your astragalus as 2.5 inches in length - as I scale the picture, I get 1.3 to 1.5 inches - maybe it is the perspective. Can you take a picture, with a scale, "straight on" like Harry's pictures of astragali?

Rich, the measurement was off, it is a tad over 2 inches.

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Edited by Shellseeker

The White Queen  ".... in her youth she could believe "six impossible things before breakfast"

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I'm pretty confident that this is a Pleistocene camel astragalus. Your specimen has substantial high-point wear, but it is from a camel. I have a complete one in my hand just now that is 2.5" max length. It's probably the one in my first image above.

http://pristis.wix.com/the-demijohn-page

 

What seest thou else

In the dark backward and abysm of time?

---Shakespeare, The Tempest

 

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I'm pretty confident that this is a Pleistocene camel astragalus. Your specimen has substantial high-point wear, but it is from a camel. I have a complete one in my hand just now that is 2.5" max length. It's probably the one in my first image above.

I keep comparing them, and do not have your discerning eye, but the overall shape seems slightly more camel-like than bison-like. Mine does not have that distinctive "bump' on the middle lower left edge. Where would Equus "fit" in your size chart?

post-2220-0-83542100-1399131115_thumb.jpg

The White Queen  ".... in her youth she could believe "six impossible things before breakfast"

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Equus does not have the double pulley shaped astragalus, Shell. It is totally different. The double pulley is only seen in artiodactyls - which is one of the reasons why a whale is an artiodactyl.

98078.jpg

Edited by RichW9090

The plural of "anecdote" is not "evidence".

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Here's a camel astragalus for comparison. You'll have to use your imagination because your specimen is worn on the high points, badly worn on the upper right in your image. The 'bump' on the middle left is worn away also.

Here is the distal side of the common perissodactyl astragali from the Peace River.

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post-42-0-85655600-1399135748_thumb.jpg

  • I found this Informative 1

http://pristis.wix.com/the-demijohn-page

 

What seest thou else

In the dark backward and abysm of time?

---Shakespeare, The Tempest

 

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