Gen. et sp. indet. Posted September 27, 2018 Share Posted September 27, 2018 Ordovician or Silurian erratic boulder from Poland. Sorry for poor quality photos - I'm not able to get better for now. Is this a chance association or can you spot fragments of calyx, stem, and cross sections through arms? What crinoids are these - crotalocrinitids? Link to comment Share on other sites More sharing options...
ynot Posted September 27, 2018 Share Posted September 27, 2018 I think the whole piece is a calyx that is worn down. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
abyssunder Posted September 27, 2018 Share Posted September 27, 2018 It's almost impossible to determine what fragments are embedded in the eroded matrix, not saying that it's impossible to determine the genus / species of the crinoid remains. I can see pluricolumnals in naturally polished longitudinal / oblique sections, and columnals in transverse view. Also there is a possibility for crinoid holdfast (anchoring system). I'm not seeing arms or calyces, but I could be wrong. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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