- The
progymnosperms are an
extinct group of woody, spore-bearing
plants that is
presumed to have
evolved from the trimerophytes, and
eventually gave rise...
-
Archaeopteris is an
extinct genus of
progymnosperm tree with fern-like leaves. A
useful index fossil, this tree is
found in
strata dating from the Upper...
- lycopods, ferns, seed
plants (seed ferns, from
earlier progymnosperms),
first trees (the
progymnosperm Archaeopteris), and
first winged insects (palaeoptera...
- seeds:
Cordaicarpus Cordaite cones and seeds:
Cordaitanthus May be
progymnosperm: leaves:
Noeggerathia Conifer leaves:
Walchia Seeds: Carpolithus, Cornucarpus...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- and by the Late
Devonian this
first forest was
accompanied by the
progymnosperms,
including the
first large trees Archaeopteris. The Late
Devonian extinction...
- prevailed, the Noeggerathiales, an
extinct group of tree fern-like
progymnosperms were a
common component of the
flora The
earliest Permian (~ 298 million...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
-
forests of
primitive plants existed: lycophytes, horsetails, ferns, and
progymnosperms evolved. Most of
these plants had true
roots and leaves, and many were...
