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349 Views 3 Replies Last post: Apr 24, 2014 10:06 AM by Dan RSS
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Apr 22, 2014 2:59 PM

stigmaria fossil?

Another find from the river Annick (Irvine,SW Scotland) Thought it may be Stigmaria but would love to hear some expert opinions, it is 3 " long and 1.5" across. DonnaSAM_0832.JPGSAM_0834.JPGSAM_0836.JPGSAM_0827.JPG

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    Apr 22, 2014 9:09 PM (in response to Donna B)
    Re: stigmaria fossil?

    Hi Donna,

     

    Yes, I think Stigmaria is a good call.

     

    However, the pattern is rather irregular.

    But interestingly, your specimen has similarities to this description from the

    explanation accompanying a geological map covering part of Ayrshire:

    "Genus Stigmaria. — Brong., 1828.

    Several peculiar examples of this common root have been met with ; amongst

    others, one specimen showing radiating scars of attachment of the rootlets. In the

    centre of the scar is a raised doss or papilla with a small hole in the centi-e. The scar

    is completed by a series of small ridges radiating in a circle from the central boss."

    [http://archive.org/stream/cu31924074692280/cu31924074692280_djvu.txt]

    You can see some of that, especially in your photos two and three.

     

    Mike

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