Alethopteris fern.jpg
Alethopteris fern
Eastern Kentucky, USA
Pennsylvanian Period (~ 330 million years ago)
Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae.
Kingdom: Plantae
Phylum: †Pteridospermatophyta
Order: †Medullosales
Family: †Alethopteridaceae
Genus: †Alethopteris
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