-
clear that the "Age of
Pteridosperms" was
perhaps a
better description.
During the 20th
century the
concept of
pteridosperms was
expanded to include...
-
extinct seed
plant groups are
recognised including those considered pteridosperms/seed ferns, as well
other groups like the Bennettitales. By far the...
- (PDF). Strelitzia. 20: 1–280. Hilton, J. & Bateman, R. M. (2006), "
Pteridosperms are the
backbone of seed-plant phylogeny",
Journal of the
Torrey Botanical...
-
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...
- were:
Sigillaria Lepidodendron Calamites pteridosperms Genera recorded in
Great Britain include:
Pteridosperm leaves: Alethopteris, Callipteridium, Cyclopteris...
-
Callistophytales were
reproductively more
sophisticated than most
other Palaeozoic pteridosperms, some of
which they seem to have out-competed and
replaced in the "coal...
- †
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...
