Pteridospermopsida

The term Pteridospermatophyta (or "seed ferns") refers to several distinct groups of extinct seed-bearing plants (spermatophytes). The oldest fossil evidence of plants of this type is of late Devonian age, and they flourished particularly during the Carboniferous and Permian periods. Pteridosperms declined during the Mesozoic Era and had mostly disappeared by the end of the Cretaceous Period, though some fossil pteridosperm-like plants seem to have survived into Eocene times in Tasmania.

Source: http://en.wikipedia.org/wiki/Pteridosperms

Alethopteris bohemica YA1274	Alethopteris bohemica YA1273	Alethopteris idae ZŠ7	Alethopteris lonchilifolia ZŠ13	Alethopteris lonchilifolia ZŠ15
Alethopteris lonchilifolia ZŠ14	Alethopteris zeilleri YA1281	Neurodontopteris auriculata ZŠ61	Pseudomariopteris ribeyronii ZŠ318

In the Virtual Museum there are total 204 samples

Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]