Calamites (Mesocalamites) Hirmer 1927 (fern)

Polypodiopsida - Equisetales - Equisetidae

Alternative spelling: Mesocalamites

Parent taxon: Calamites according to W. D. Tidwell et al. 1992

See also Andrews 1970

Sister taxa: Calamites aliwalensis, Calamites goepperti, Calamites radiatus, Calamites suckowii, Calamites undulatus

Subtaxa: Mesocalamites roemeri

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• Permian of China (1 collection)

• Pennsylvanian of United States (2: Illinois)

• Carboniferous of United States (1: Arizona)

• Mississippian of United States (5: Illinois, Utah, West Virginia)

Total: 9 collections including 12 occurrences

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