-
Asterotheca is a
genus of seedless, spore-bearing,
vascularized ferns dating from the
Carboniferous of the
Paleozoic to the Tri****ic of the Mesozoic....
- 1890)
Synonyms Xenochirus pentacanthus Gilbert, 1890
Asterotheca pentacantha (Gilbert, 1890)
Asterotheca pentacanthus (Gilbert, 1890)
Xenertmus pentacanthus...
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infraspinatus (Gilbert, 1904)
Synonyms Xeneretmus infraspinatus Gilbert, 1904
Asterotheca infraspinata (Gilbert, 1904)
Bathyagonus infraspinata (Gilbert, 1904)...
- alasc**** (Gilbert, 1896)
Synonyms Xenochirus alasc**** Gilbert, 1896
Asterotheca alascana (Gilbert, 1896)
Bathyagonus alascana (Gilbert, 1896) Xenertmus...
- fern
group has a long
fossil history with many
extinct taxa (Psaronius,
Asterotheca, Scolecopteris, Eoangiopteris, Qasimia, Marantoidea, Danaeites, Marattiopsis...
- †Armenoceras †Artisia †
Asterotheca †
Asterotheca crenulata †
Asterotheca cyathea †
Asterotheca hemitelliodes †
Asterotheca miltoni †
Asterotheca oreopteridia †Asteroxylon...
-
Quemquemtreu area of the Cañadón
Pancho locality.
These species are:
Asterotheca rigbyana,
Marattiopsis muensteri,
Cladophlebis kurtzii, C. indica, Dictyophyllum...
-
sometimes tripinnate.
Other leaf
taxon ****ociated with
Psaronius include:
Asterotheca, Acitheca,
Remia and Radstockia.
Pecopteris polymorpha Pecopteris arborescens...
- (Walchia, etc.)
occupied drier soils,
while marattialean ferns (Pecopteris,
Asterotheca, etc.) and
horsetails (Sphenophyllum, Annularia, Calamites, etc.) were...
-
small horsetail (Equisetum) stem fragments, and fern
leaves resembling Asterotheca.
These are
thought to have been
brought into the dune
field by large...
