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

Laveineopteris lubnensis Havlena		ZŠ436
Laveineopteris lubnensis Havlena		ZŠ433
Laveineopteris lubnensis Havlena		ZŠ431
Laveineopteris lubnensis Havlena		ZŠ435
Laveineopteris tenuifolia	Šimůnek, Cleal (2011), Pl. VIII	ZŠ465
Laveineopteris tenuifolia		ZŠ444
Laveineopteris tenuifolia		ZŠ443
Laveineopteris tenuifolia		ZŠ439
Laveineopteris tenuifolia		ZŠ441
Laveineopteris tenuifolia		ZŠ442
Laveineopteris tenuifolia		ZŠ440
Laveineopteris tenuifolia		ZŠ822
Linopteris neuropteroides (Gutbier, 1855)	in prep. Šimůnek (2020)fig. 3G	ZŠ847
Linopteris obliqua (Bunbury, 1847)	in prep. Šimůnek (2020)fig. 7A	ZŠ849
Linopteris		ZŠ804
Lyginopteris bauemleri		p4651
Lyginopteris fragilis		p4657
Lyginopteris stangeri		p4648
Mixoneura osmundaeformis		ZŠ173
Mixoneura osmundaeformis		ZŠ172

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