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Protopolyporoxylon
Taxonomy
Protopolyporoxylon was named by Vogellehner (1968). It is not extant. Its type is Protopolyporoxylon jurassicum.
It was assigned to Gymnospermophyta by Blazer (1975).
It was assigned to Gymnospermophyta by Blazer (1975).
Species
P. jurassicum (type species)