Equisetidae is one of the four subclasses of Polypodiopsida (ferns), a group of vascular plants with a fossil record going back to the Devonian. They are...

stems: Lycopodites, Selaginellites Sphenopsid leaves: Annularia, Asterophyllites Sphenopsid stems: Calamites Sphenopsid reproductive parts: Bowmanites, Calamostachys...

Lepidodendron and Sigillaria lycopod trees dominate coal swamps, with smaller sphenopsids (horsetails) and seed ferns between. Gymnosperms, including conifers...

Other plants found in Antarctica during the Permian include Cordaitales, sphenopsids, ferns, and lycophytes. At the end of the Permian, the climate became...

Archaeocalamitaceae is a family of extinct sphenopsids related to horsetails. Archaeocalamite fossils have been found in Siberia, Poland, and Brazil....

the oldest sphenopsid, but has since been reinterpreted as a possible red alga Schultes, Richard Evans; Dorf, Erling (1938). "A Sphenopsid from the Lower...

beetles, seed plants and conifers diversify while lepidodendrids and sphenopsids decrease. Terrestrial temnospondyl amphibians and pelycosaurs (e.g. Dimetrodon)...

Shou-Gang & Wang, Qi (2005), "Rotafolia songziensis gen. et comb. nov., a sphenopsid from the Late Devonian of Hubei, China", Botanical Journal of the Linnean...

leaf only, including: 1 bryophyte (mosses and liverworts) 11 ferns 1 sphenopsid 10 conifers 1 ginkgo (uncommon) 278 angiosperms (roughly 92% of all taxa...

flagellate sperm when it reached a receptive megagametophyte. Lycopods and sphenopsids got a fair way down the path to the seed habit without ever crossing...

Shou-Gang & Wang, Qi (2005). "Rotafolia songziensis gen. et comb. nov., a sphenopsid from the Late Devonian of Hubei, China". Botanical Journal of the Linnean...

Lepidodendron, and herbaceous forms called Lycopodites and Cormophyton; sphenopsids like Calamites a tree-like horsetail relative, with common foliage names...

a genus of Late Devonian sphenopsid, currently containing one species, Rinistachya hilleri. It comprises the only sphenopsid as yet known from the Devonian...

downward diversity trend is slight, but several notable lycopsid and sphenopsid species disappear from European coal swamps at this time. Westphalian...

leaf only, including: 1 bryophyte (mosses and liverworts) 11 ferns 1 sphenopsid 10 conifers 1 ginkgo (uncommon) 278 angiosperms (roughly 92% of all taxa...

Genus / Taxon Species Strata Notes Archaeocalamites A. sp. Fragmentary sphenopsid (horsetail) stems. Sphenopsida Indeterminate East Kirkton Limestone Horsetail...

The cladoxylopsids are an extinct group of plants related to ferns and sphenopsids. They had a central trunk, from the top of which several lateral branches...

fragmentary specimen Estinnophyton E. yunnanense Sphenopsida? Possibly a stem-sphenopsid Eophyllophyton E. bellum Eophyllophytopsida (Euphyllophytes) Oldest plant...

spores. Fossil plants found in this formation include glossopterids, sphenopsids, lycopsids, gymnosperms, pteridophytes and marchantiophytes. Because...

Sphenopsida Genus Species Notes Images Rinistachya R. hilleri Sphenopsid. Only sphenopsid known from the Devonian of Gondwana....

Li, C.-S. (2024). "Re-investigation of Bowmanites laxus Halle, 1927, a sphenopsid fructification from the Permian of China". Review of Palaeobotany and...

A plant of uncertain phylogenetic placement, possibly a lycopsid or a sphenopsid. Genus includes new species Q. mira. Scolecopteris minuta Sp. nov In press...