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Pennsylvanian Blastoid in 3D

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Fellow WIPS member Shellie Luallin, who is expert in 3D imaging of fossils




recently imaged a presumed Pennsylvanian blastoid of mine from Cherokee County, OK and generously made it available as a free download:






Note the very pronounced interambulacral areas (deltoids) where the hydrospires are developed.


Katz (1978)




lumped exisiting variants into one species P. rusticus based on hydrospire similarity


Given that this distinctive morphologic end member is stratigraphically restricted and present a population, perhaps this conclusion should be revisited.

Inline image



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