Progymnosperm
The progymnosperms are an extinct group of woody, spore-bearing plants that is presumed to have evolved from the trimerophytes, and eventually gave rise to the gymnosperms. They have been treated formally at the rank of division Progymnospermophyta or class Progymnospermopsida (as opposite). The stratigraphically oldest known examples belong to the Middle Devonian order the Aneurophytales, with forms such as Protopteridium, in which the vegetative organs consisted of relatively loose clusters of axes. Tetraxylopteris is another example of a genus lacking leaves. In more advanced aneurophytaleans such as Aneurophyton these vegetative organs started to look rather more like fronds, and eventually during Late Devonian times the aneurophytaleans are presumed to have given rise to the pteridosp
primaryTopic
Progymnosperm
The progymnosperms are an extinct group of woody, spore-bearing plants that is presumed to have evolved from the trimerophytes, and eventually gave rise to the gymnosperms. They have been treated formally at the rank of division Progymnospermophyta or class Progymnospermopsida (as opposite). The stratigraphically oldest known examples belong to the Middle Devonian order the Aneurophytales, with forms such as Protopteridium, in which the vegetative organs consisted of relatively loose clusters of axes. Tetraxylopteris is another example of a genus lacking leaves. In more advanced aneurophytaleans such as Aneurophyton these vegetative organs started to look rather more like fronds, and eventually during Late Devonian times the aneurophytaleans are presumed to have given rise to the pteridosp
has abstract
Die Progymnospermen sind eine ...... amenpflanzen entwickelt haben.
@de
Pranagozalążkowe (Progymnosper ...... rotoplastów roślin nasiennych.
@pl
ProgymnospermesFichier:Defaut ...... arbonifère supérieur au Trias.
@fr
Progymnospermophyta è una divisione di piante paleozoiche.
@it
Progymnospermophyta is een uit ...... e naaktzadigen (Gymnospermae).
@nl
Progymnospermophyta o Progymno ...... , floema y xilema secundarios.
@es
Progymnospermophyta é uma divi ...... erior ao Carbonífero Inferior.
@pt
The progymnosperms are an exti ...... s but others were homosporous.
@en
前裸子植物綱(學名:Progymnospermophyta) ...... 分類到門級或綱級(Progymnospermopsida)。
@zh
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Wikipage revision ID
742,701,201
image caption
Archaeopteris fossil leaves
subdivision
*†Aneurophytales
*†Protopityales
*†Archaeopteridales
subdivision ranks
taxon
Progymnospermopsida
subject
hypernym
type
comment
Die Progymnospermen sind eine ...... amenpflanzen entwickelt haben.
@de
Pranagozalążkowe (Progymnosper ...... rotoplastów roślin nasiennych.
@pl
ProgymnospermesFichier:Defaut ...... n cambium vasculaire bifacial.
@fr
Progymnospermophyta è una divisione di piante paleozoiche.
@it
Progymnospermophyta is een uit ...... e naaktzadigen (Gymnospermae).
@nl
Progymnospermophyta o Progymno ...... borescente con un patrón de ra
@es
Progymnospermophyta é uma divi ...... erior ao Carbonífero Inferior.
@pt
The progymnosperms are an exti ...... ve given rise to the pteridosp
@en
前裸子植物綱(學名:Progymnospermophyta) ...... 分類到門級或綱級(Progymnospermopsida)。
@zh
label
Pranagozalążkowe
@pl
Progymnosperm
@en
Progymnospermen
@de
Progymnospermes
@fr
Progymnospermophyta
@es
Progymnospermophyta
@it
Progymnospermophyta
@nl
Progymnospermophyta
@pt
前裸子植物門
@zh