Spectrochemical study of coalified Trigonocarpus grandis (Pennsylvanian tree-fern ovule, Canada): Implications for fossil-organ linkage

► Coalified Carboniferous ovule of Alethopteris pseudograndinioides ► Preservation model; nucellus, cuticle, covers ► Aliphatic chemistry promotes preservation. ► Comparison with coalified seeds ► Spectrochemistry as modus operandi foliage-ovule connection