Polypodiopsida - Equisetales - Equisetidae

Parent taxon: Equisetales according to H. N. Andrews 1970

Sister taxa: Angaroradix, Annularia, Annulariopsis, Annulina, Archaeocalamitaceae, Barakaria, Borisiella, Calamitaceae, Corynophyllites, Equisetaceae, Equisetophyton, Manchurostachys, Neokoretrophyllites, Notocalamites, Oncylogonatum, Phyllostachya, Phyllothecaceae, Protocalamostachys, Pseudoannularia, Pseudoasterophyllites, Pseudolobatannularia, Raniganjia, Schizoneuropsis

Subtaxa: Protannularia harknessii

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Type: Protannularia harknessii

Distribution: there are no occurrences of Protannularia in the database

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Specimen images are retrieved through the ePANDDA API.