Equisetopsida

Superregnum: Eukaryota
Regnum: Plantae
Divisio: Tracheophyta
Divisio: Pteridophyta
Classis: Equisetopsida
Ordines (1 + 2†): Equisetales - †Pseudoborniales - †Sphenophyllales

Equisetopsida C. Agardh

• Sphenopsida

Under the classification of Chase & Reveal (2009), Equisetopsida is synonymous with Embryophyta Engler, 1892.

• Chase, M.W. & Reveal, J.L. 2009. A phylogenetic classification of the land plants to accompany APG III. Botanical Journal of the Linnean Society 161(2): 122–127. DOI: 10.1111/j.1095-8339.2009.01002.x   Reference page. 
• Smith, A.R., Pryer, K.M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P.G. 2006. A classification for extant ferns. Taxon 55(3): 705–731. DOI: 10.2307/25065646 JSTOR ResearchGate PDF. Reference page.