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not specified
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Tuva
unknown
Vaalbara (Kaapvaal)
Vaalbara (Pilbara)
Xinjiang
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Total: 1
infraspecies
valid
Pteridium xiphoides
Forma
weberi
Z. Kvaček, Winterscheid in Winterscheid, Z. Kvaček, Váňa, Ignatov
Palaeontographica, Abt. B, Paläophytol., 297(1-6):
121.
May 2018
