| Class | CALAMOPHYTA (horsetails) |
| Phylum | PTERIDOPHYTA (ferns and allies) |
| Subkingdom | VIRIDIPLANTAE (lower green plants) |
| Kingdom | PLANTAE (plants) |
| Domain | Eukaryota (eukaryotes) |
| Life | BIOTA (living things) |
| Handling & Magnification | Author | Year | Title | Source |
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CALAMOPHYTA (horsetails) may also be included in identification literature listed under the following higher taxa:
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