When evolution just gives up

May 13, 2016


Damn, Megalonyx jeffersonii, you really let yourself go.

4 Responses to “When evolution just gives up”

  1. Augusto Says:

    I think it is a Paramylodon harlani. And although it is at times difficult to see ground sloths as good for something, check the prominent muscle insertion marks all over the limbs of this one!

  2. Mike Taylor Says:

    The signage at the museum definitely says Megalonyx jeffersoni.

  3. Augusto Says:

    If you are still there, please tell the staff members this is Paramylodon. Here is a photo of a full skeleton: http://www.biodiversitylibrary.org/item/138852#page/567/mode/1up
    On the contrary. here is a figure on the more gracile bones of the forearm in Megalonyx jeffersoni:
    Pertinent literature here: http://www.mediafire.com/download/zbb5684a74a8wdh/Cenozoc+gravigrade+edentates+of+western+North+America…+%28Stock%2C+C.%2C+1925%29.pdf

  4. Mike Taylor Says:


    You make an interesting case. We’re not still there, but I was going to email our host at the museum anyway just to thank her for helping to make our visit so productive; so I will mention this when I do.

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