Definition of Pteridosperm. Meaning of Pteridosperm. Synonyms of Pteridosperm

- Pterido****tophyta, also called "pteridosperms" or "seed ferns" are a polyphyletic grouping of extinct seed-producing plants. The earliest fossil evidence...
- were: Sigillaria Lepidodendron Calamites pteridosperms Genera recorded in Great Britain include: Pteridosperm leaves: Alethopteris, Callipteridium, Cyclopteris...
- †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...
- †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...
- extinct seed plant groups are recognised including those considered pteridosperms/seed ferns, as well other groups like the Bennettitales. By far the...
- described as pteridosperms (a polyphyletic group sometimes referred to as "seed ferns") and, thus, the group on which the concept of pteridosperms was first...
- well as the extinct Bennettitales. Other groups of plants included pteridosperms or "seed ferns", a collective term that refers to disparate groups of...
- modern-day Australia suggest a flora dominated by different types of pteridosperms with pockets of isoetoid lycopsids. During Megarachne's time, Argentina...