Ptychocrinus sp. (Wachsmuth&Springer 1885) ?
By Ludwigia
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1cm. Distal coiled Holdfast from Calenon, On., Canada. Lower Silurian, Llandoveryian, Whirlpool Formation.
By Ludwigia
1cm. Distal coiled Holdfast from Calenon, On., Canada. Lower Silurian, Llandoveryian, Whirlpool Formation.
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