Archaeocalamitaceae
| Archaeocalamitaceae Temporal range: | |
|---|---|
| Archaeocalamites | |
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Subclass: | Equisetidae |
| Order: | Equisetales |
| Family: | †Archaeocalamitaceae Koidz. |
| Genera | |
| |
Archaeocalamitaceae is a family of extinct sphenopsids related to horsetails. Archaeocalamite fossils have been found in Siberia, Poland, and Brazil. The fossils date to the Middle Devonian-Carboniferous, lower Carboniferous (Dinantian), and the lower Permian respectively. Given the distance of the fossil discoveries, archaeocalamites may have had a subcosmopolitan distribution.