Symmetrical bifurcation of the Alethopteris urophylla frond
Resumen
A symmetrical bifurcation of an Alethopteris urophylla frond from the Pennsylvanian (Upper Carboniferous) of the Northern France coalfield shows some still-attached remains of foliage. Such rare specimens contribute, step by step, to a better understanding of the frond architecture of the genus Alethopteris, which is of the bifurcatepinnate type. A few complementary general comments are given.
Palabras clave
Palaeobotany, Carboniferous, Medullosales, Alethopteris, frond architecture
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