Williamsoniaceae
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[edit]
Superregnum: Eukaryota
Regnum: Plantae
Divisio: Tracheophyta
Divisio: Cycadophyta
Classis: Cycadopsida
Ordo: †Bennettitales
Familia: †Williamsoniaceae
Genera:
†Ptilophyllum –
†Zamites
Name[edit]
Williamsoniaceae (Carruthers, 1870) Nathorst, 1913
References[edit]
- Carruthers, W. 1870. On fossil Cycadean stems from the Secondary rocks of Britain. Transactions Linnean Society London, 26: 675-708.
- Nathorst, A.G. 1913. How are the names Williamsonia and Wielandiella to be used? A question of nomenclature. Geology Foeren. Stockh. Foerenhandl, 35: 361-366.