Pteridospermatophyta, also called "pteridosperms" or "seed ferns" are a polyphyletic grouping of extinct seed-producing plants. The earliest fossil evidence...
18 KB (1,599 words) - 23:42, 26 September 2024
Polypodiophyta †Progymnospermophyta Superdivision Spermatophyta †Pteridospermatophyta Pinophyta Cycadophyta Ginkgophyta Gnetophyta Magnoliophyta (angiosperms)...
24 KB (2,050 words) - 19:56, 12 September 2024
Dayvaultia from the Late Jurassic of North America. "Seed ferns" (Pteridospermatophyta) is a collective term to refer to disparate lineages of fern like...
232 KB (25,073 words) - 12:52, 9 October 2024
in the earliest, long-extinct gymnosperm group, the seed ferns (Pteridospermatophyta). The conifers or Pinophyta are one of four divisions of extant gymnosperms...
12 KB (1,221 words) - 00:12, 5 October 2024
Lepidopteris callipteroides is a form species for leaves of Late Permian Pteridospermatophyta, or seed ferns, which lived from around 252 million years ago in...
3 KB (213 words) - 00:24, 20 April 2024
Calamopityaceae (category Pteridospermatophyta)
division of extinct seed-bearing plants (spermatophytes) known as Pteridospermatophyta. It is the only family in the monotypic order Calamopityales. This...
14 KB (1,403 words) - 13:18, 2 September 2024
The Sachrang Formation or "Posidonienschiefer" Formation (Whose Vulgar name is "Posidonia Shale") is a geological formation of southwestern Germany, northern...
366 KB (13,381 words) - 05:09, 7 October 2024
Pteridophyta (ferns and horsetails) Rhyniophyta (early plants) Gymnosperms Pteridospermatophyta (seed ferns) Cycadophyta Ginkgophyta Gnetophyta Pinophyta (conifers)...
5 KB (363 words) - 03:52, 6 August 2024
Polypodiophyta – ferns and horsetails Seed plants (spermatophytes) †Pteridospermatophyta – seed ferns Pinophyta – conifers Cycadophyta – cycads Ginkgophyta...
41 KB (3,854 words) - 05:50, 5 August 2024
Pecopteris and the tree ferns Megaphyton and Caulopteris. Seed ferns or Pteridospermatophyta include Cyclopteris, Neuropteris, Alethopteris, and Sphenopteris...
22 KB (2,737 words) - 12:58, 5 October 2024