†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
Distribution:
• Permian of China (1 collection)
• Carboniferous of United States (8: Arizona, Illinois, Utah, West Virginia)
Total: 9 collections including 12 occurrences