-
Alethopteris is a
prehistoric plant genus of
fossil pterido****tophytes (seed ferns) that
developed in the
Carboniferous period (around 360 to 300 million...
- to medium-sized trees. The
largest specimens were
probably of
genus Alethopteris,
whose fronds could be 7
metres long and the
trees were
perhaps up to...
-
pteridosperms Genera recorded in
Great Britain include:
Pteridosperm leaves:
Alethopteris, Callipteridium,
Cyclopteris (leaf bases), ?Desmopteris, ****sonites...
-
ferns and "seed ferns"
include Pecopteris, Cyclopteris, Neuropteris,
Alethopteris, and Sphenopteris;
Megaphyton and
Caulopteris were tree ferns. The Equisetales...
- Virginia. †
Alethopteris †
Alethopteris decurrens †
Alethopteris gigas †
Alethopteris grandini †
Alethopteris parva †
Alethopteris serlii †
Alethopteris sternberg...
-
seeds instead of spores; they had
common foliage names Mariopteris,
Alethopteris, Odontopteris, Neuropteris,
Laveineopteris and Macroneuropteris; extinct...
-
tentative report †
Alethopteris †
Alethopteris davreuxi †
Alethopteris decurrens †
Alethopteris grandini †
Alethopteris serlii †
Alethopteris valida †Amphiscapha...
- Seed
ferns or Pterido****tophyta
include Cyclopteris, Neuropteris,
Alethopteris, and Sphenopteris. The
Equisetales included the
common giant form Calamites...
- †Ageleodus †
Alethopteris †
Alethopteris ambigua – or
unidentified comparable form †
Alethopteris aquilina †
Alethopteris decurrens †
Alethopteris evansii †Alethopteris...
-
occurrences of
Precambrian fossils in Alabama. †
Alethopteris †
Alethopteris lonchitica †
Alethopteris valida †Amphiscapha –
tentative report †Amplexopora...
