Progymnospermophyta (Progymnosperms)

The progymnosperms are an extinct group of woody, spore-bearing plants that is presumed to have evolved from the "trimerophytes", and eventually gave rise to the gymnosperms.[1] They have been treated formally at the rank of division Progymnospermophyta or class Progymnospermopsida (as opposite). The stratigraphically oldest known examples belong to the Middle Devonian order the Aneurophytales, with forms such as Protopteridium, in which the vegetative organs consisted of relatively loose clusters of axes.[2] Tetraxylopteris is another example of a genus lacking leaves. In more advanced aneurophytaleans such as Aneurophyton these vegetative organs started to look rather more like fronds,[3] and eventually during Late Devonian times the anuerophytaleans are presumed to have given rise to the pteridosperm order, the Lyginopteridales. In Late Devonian times, another group of progymnosperms gave rise to the first really large trees known as Archaeopteris.

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

Source: http://biodidac.bio.uottawa.ca/thumbnails/filedet.htm?File_name=GYMN002B&File_type=GIF

Noeggerathia foliosa		JŠ59
Noeggerathia foliosa		JŠ11
Noeggerathia foliosa	Šetlík (1956), Pl. VIII, fig. 2	JŠ14
Noeggerathia foliosa	Šetlík (1956), Pl. IX, fig. 6	JŠ20
Noeggerathia foliosa	Šetlík (1956), Pl. XVI, fig. 3	JŠ50
Noeggerathia foliosa	Šetlík (1956), Pl. XIII, fig. 5, Pl. XV, fig. 2	JŠ55
Noeggerathia foliosa		JŠ56
Noeggerathia foliosa		JŠ57
Noeggerathia foliosa	Šetlík (1956), Pl. III, fig. 4	JŠ1
Noeggerathia foliosa	Šetlík (1956), Pl. V, fig. 1, Pl. VI	JŠ5
Noeggerathia foliosa	Šetlík (1956), Pl. VII, fig. 3	JŠ9
Noeggerathia foliosa	Šetlík (1956), Pl. IX, fig. 1	JŠ15
Noeggerathia foliosa	Šetlík (1956), Pl. IX, fig. 4	JŠ18
Noeggerathia foliosa	Šetlík (1956), Pl. XII, fig. 8	JŠ36
Noeggerathia foliosa	Šetlík (1956), Pl. VIII, fig. 7, Pl. XIV, fig. 2	JŠ39
Noeggerathia foliosa	Šetlík (1956), Pl. XVI, fig. 1	JŠ47
Noeggerathia foliosa		JŠ48
Noeggerathia foliosa	Šetlík (1956), Pl. VII, fig. 1	JŠ7
Noeggerathia foliosa	Šetlík (1956), Pl. VIII, fig. 1	JŠ13
Noeggerathia foliosa	AD, originál?	JŠ4

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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]