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Encyclopedia > Marsileaceae
Marsileaceae

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Publication (2255 words)
LUPIA, R., H. PRYER, and P.R. Marsileaceae sporocarps and spores from the Late Cretaceous of Georgia, U.S.A. International Journal of Plant Sciences 161: 975-988.
Monomegasporangy (single megaspore/megasporangium) is assumed to be one of the key innovations in the evolution of seed plants.
On the basis of shared morphological features of the sporocarp wall structure, and in situ megaspore and microspore ultrastructure and ornamentation, these specimens are assigned to the water fern family, Marsileaceae.
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