Conostichus Posted September 29, 2020 Share Posted September 29, 2020 Fellow WIPS member Shellie Luallin, who is expert in 3D imaging of fossils https://sketchfab.com/Paleogirl recently imaged a presumed Pennsylvanian blastoid of mine from Cherokee County, OK and generously made it available as a free download: https://sketchfab.com/3d-models/pentremites-rusticus-e729f54539014770b0128b000fca841b Note the very pronounced interambulacral areas (deltoids) where the hydrospires are developed. Katz (1978) https://www.jstor.org/stable/1303971?seq=1 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. Link to comment Share on other sites More sharing options...
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