| Information | |
|---|---|
| has gloss | (noun) fossil gymnospermous trees or climbing plants from the Devonian: seed ferns Cycadofilicales, order Lyginopteridales, order Cycadofilicales, Lyginopteridales |
| has gloss | eng: The Lyginopteridales were the archetypal pteridosperms: they were the first plant fossils to be described as pteridosperms and thus the group on which the concept of pteridosperms was first developed; they are the stratigraphically oldest-known pteridosperms, occurring first in late Devonian strata; and they have the most primitive features, most notably in the structure of their ovules. They probably evolved from a group of Late Devonian progymnosperms known as the Aneurophytales, which had large, compound frond-like leaves. The Lyginopteridales became the most abundant group of pteridosperms during Mississippian times, and included both trees and smaller plants. and then Stamnostoma. These earliest ovules had the apical part of the nucellus exposed, from which there was a projection known as a lagenostome (sometimes also called a salpinx) that facilitated capture of the pollen and directed it down to the pollen chamber above the megagametophyte. |
| lexicalization | eng: Cycadofilicales |
| lexicalization | eng: Lyginopteridales |
| lexicalization | eng: order Cycadofilicales |
| lexicalization | eng: order Lyginopteridales |
| subclass of | (noun) the order of plants plant order |
| Media | |
|---|---|
| media:img | Crossotheca nodule.JPG |
| media:img | Mariopteris sauveurii.jpg |
Lexvo © 2008-2025 Gerard de Melo. Contact Legal Information / Imprint
