- Pterido****tophyta, also
called "
pteridosperms" or "seed ferns" are a
polyphyletic grouping of
extinct seed-producing plants. The
earliest fossil evidence...
- were:
Sigillaria Lepidodendron Calamites pteridosperms Genera recorded in
Great Britain include:
Pteridosperm leaves: Alethopteris, Callipteridium, Cyclopteris...
- †
Pteridosperms* (seed ferns) and
other extinct seed
plant groups †Bennettitales †Calamopityales †Callistophytales †Caytoniales †Cordaitales †Corysto****les...
- †
Pteridosperms* (seed ferns) and
other extinct seed
plant groups †Bennettitales †Calamopityales †Callistophytales †Caytoniales †Cordaitales †Corysto****les...
-
described as
pteridosperms (a
polyphyletic group sometimes referred to as "seed ferns") and, thus, the
group on
which the
concept of
pteridosperms was first...
- †
Pteridosperms* (seed ferns) and
other extinct seed
plant groups †Bennettitales †Calamopityales †Callistophytales †Caytoniales †Cordaitales †Corysto****les...
- †
Pteridosperms* (seed ferns) and
other extinct seed
plant groups †Bennettitales †Calamopityales †Callistophytales †Caytoniales †Cordaitales †Corysto****les...
- Gondwana.
During the Tri****ic,
Antarctica was
dominated by seed
ferns (
pteridosperms)
belonging to the
genus Dicroidium,
which grew as trees.
Other ****ociated...
-
extinct seed
plant groups are
recognised including those considered pteridosperms/seed ferns, as well
other groups like the Bennettitales. By far the...
- Gr**** πτερίς, πτερίδος (pterís, pterídos) pteridology, pteridophyte,
pteridosperm pto- fall Gr**** πίπτειν (píptein), πτωτός (ptōtós), πτωτικός (ptōtikós)...
