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 Add this item to the list  828891 Original description
   
Description type:Original description 
Description:Spheroidal microfossil <92 µm in diameter, composed of central vesicle (zoosporangium) enveloped in prominent sheath; sheath bounded on inside by distinctly opaque boundary layer, periphery usually coherent (rarely ripped or frayed), smooth to gently wrinkled; vesicle walled, typically filled with thin-walled spheroidal or irregularly shaped bodies (zoospores; shape determined by availability of space), each bounded by what appears to be a membrane or wall. 
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