Nota de aplicación
Ancient group of plants known only as fossils dating to the Middle Devonian to Early Carboniferous; they are thought to be ancestors of ferns and horsetails.
Ubicación jerarquía
- faceta agentes
- .. organismo vivo (nombre jerárquico)
- .... organismo vivo (entidad)
- ...... Eucariota (dominio)
- ........ Plantae (reino)
- .......... Pteridophyta (division)
- ............ Cladoxylopsida (extinct class)
- ............ Polypodiopsida (class) [+]