Cantisolanum daturoides was a tiny early Eocene flowering plant known from a single pyritised seed. It was historically compared with nightshades, but modern micro-CT revealed that its seed construction is fundamentally different from Solanaceae. Its straight axis and specialised seed coat instead point towards the commelinid monocots.

The exact family and order remain unresolved, so the fossil should not be forced into a modern plant family. What the seed does preserve is remarkable microscopic anatomy: individual seed-coat cells, a differentiated micropyle at one end and a thickened chalazal region at the other. It is therefore a good example of how internal imaging can overturn an old identification without requiring the formal fossil name itself to be discarded.