Stephanospermum braidwoodensis: sarcotesta

A reconstruction, based on microtomography, of the sarcotesta of a new fossil pteridosperm ovule (Stephanospermum braidwoodensis FMNH P30420) from Mazon Creek in Illinois as described by Alan Spencer, Jason Hilton and Mark Sutton in the journal Review of Palaeobotany and Palynology.

Check out the full story in this blog post.