- 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...
- †
Progymnosperms (paraphyletic) ****tophytes...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- lycopods, ferns, seed
plants (seed ferns, from
earlier progymnosperms),
first trees (the
progymnosperm Archaeopteris), and
first winged insects (palaeoptera...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- †
Progymnosperms* †Noeggerathiopsida †Aneurophytopsida †Archaeopteridopsida †Protopityales...
- prevailed, the Noeggerathiales, an
extinct group of tree fern-like
progymnosperms were a
common component of the
flora The
earliest Permian (~ 298 million...
