†unranked clade Zygopteridae

Cladoxylopsida - Zygopteridae - Zygopteridae

Parent taxon: Cladoxylopsida according to P. Kenrick and P.R. Crane 1997

Sister taxa: Cladoxyliidae, Pietzschia, Pseudosporochnales, Stauropteridae, Steloxylales, Syncardia

Subtaxa: Austroclepsis Corynepteris Eoclepsydropsis

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Distribution:

• Permian of Argentina (2 collections), China (1), Spain (1)

• Carboniferous of Belgium (1), the United Kingdom (2), United States (2: Michigan, Utah)

Total: 9 collections each including a single occurrence

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