- the
Pennsylvanian age.
Analysis of the
morphology and
anatomy of the
stigmarian systems suggests that the axes
around the
structure were shoot-like, and...
-
circular scars,
forming an
underground network of
branched rootlets.
These stigmarian rootlets branched dichotomously from the
rhizomorphs similar to Isoetes...
-
probably Sigillaria, with
attached stigmarian roots. Base of a
fossil lycopsid showing connection with
stigmarian roots.
Reconstruction of a Silurian...
- shoot-like, and
dichotomous branching of the
rootlets structured the
stigmarian systems.
Rootlet scars can be seen from
Stigmaria fossils where the root...
-
Ancient in situ lycopsid,
probably Sigillaria, with
attached stigmarian roots,
Joggins Formation, Canada...
-
Fossil lycopsid,
probably Sigillaria, from Joggins, with
attached stigmarian roots...
-
periderm development, three-zoned cortex,
rootlike appendages known as
stigmarian rootlets arranged in a
spiralling pattern, and
megasporangium each containing...
- It was
discovered in 1887 and
contains the
fossilised stumps and the
stigmarian system of
eleven extinct Lepidodendron lycopsids,
which are sometimes...
-
Ancient in situ lycopsid,
probably Sigillaria, with
attached stigmarian roots.
Specimen is from the
Joggins Formation (Pennsylvanian), ****berland Basin...
- Underclays,
which occur within carboniferous coal measures,
commonly contain Stigmarian roots.
Synonyms for
underclay included seat clay, root clay, thill, warrant...
