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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


 

YA1274
Alethopteris bohemica YA1274
YA1273
Alethopteris bohemica YA1273
ZS_7
Alethopteris idae ZŠ7
ZS_13
Alethopteris lonchilifolia ZŠ13
ZS_15
Alethopteris lonchilifolia ZŠ15
ZS_14
Alethopteris lonchilifolia ZŠ14
YA1281
Alethopteris zeilleri YA1281
ZS_61
Neurodontopteris auriculata ZŠ61
ZS_318
Pseudomariopteris ribeyronii ZŠ318
 

In the Virtual Museum there are total 150 samples

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