-
class of
early vascular plants from the Devonian,
informally called trimerophytes. It
contains genera such as Psilophyton. This
group is
probably paraphyletic...
-
rhyniophytes and
trimerophytes are that the
development of its
vascular strand is exarch,
while it is
centrarch in
rhyniophytes and
trimerophytes. The sporangia...
-
Devonian (around 420 to 380
million years ago). It has been
placed in the "
trimerophytes", a
strongly paraphyletic group of
early members of the
lineage leading...
- woody, spore-bearing
plants that is
presumed to have
evolved from the
trimerophytes, and
eventually gave rise to the gymnosperms,
ancestral to acrogymnosperms...
- †Zosterophyllophyta –
zosterophylls Lycopodiophyta –
clubmosses †Trimerophytophyta –
trimerophytes Polypodiophyta –
ferns and
horsetails Seed
plants (****tophytes)...
- the
xylem bundle itself, and some mid-Devonian plants, such as the
Trimerophytes, had much
larger steles than
their early ancestors.
While wider tracheids...
- Ma
First signs of
teeth in fish.
Earliest Nautilida, lycophytes, and
trimerophytes. 488–400 Ma
First cephalopods (nautiloids) and chitons. 395 Ma First...
-
release their spores, and had
exarch strands of
xylem (e.g., Gosslingia).
Trimerophytes comprised plants with
large clusters of
downwards curving terminal sporangia...
-
lycophytes (clubmosses and relatives). It had
previously been
placed in the "
trimerophytes" (a
group now
thought to be paraphyletic),
which were
considered to...
-
early land
plants suggested that at
least the
rhyniophytes and the
trimerophytes were not monophyletic.
Separating out 'basal groups', such as the earliest...
