Fossilised seed fern (Crossotheca hoeninghausi) leaf

Micro-CT scan reconstruction of a pollen-bearing leaf of a 310-million-year-old seed fern (Crossotheca hoeninghausi), preserved as void space inside an egg-shaped siderite (iron carbonate) concretion. 

The scan reveals the external shape and structure of the leaf, including clusters of pollen-containing sacs borne on the ends of each short blade segment. 

The specimen (V16025) came from Carboniferous period deposits (Coal Measures) from Cosely near Dudley, West Midlands, England.


The Museum retains copyright on all scans of our specimens. Their use is subject to the Museum’s copyright policy on images. All Museum specimen scans will be archived and can be obtained with permission from the collection curator. Stereolithography and 3D printing are not permitted without prior permission from the curator.