Class Equisetopsida Agardh 1825
PaleoDB taxon number: 54758
Synonym: Equisetophyceae [replaced name] (taxon 55180)
Parent taxon: Equisetophyta according to A. B. Doweld 2001
Sister taxa: Asterocalamitopsida, Calamitopsida
Subtaxa: Chlamidostachys, Echinostachyales, Gondwanostachyales, Sphenophyllales