Gymnosperms

The gymnosperms are a group of seed-bearing plants that includes conifers, cycads, Ginkgo, and Gnetales. The term "gymnosperm" comes from the Greek word gymnospermos (γυμνόσπερμος), meaning "naked seeds", after the unenclosed condition of their seeds (called ovules in their unfertilized state). Their naked condition stands in contrast to the seeds or ovules of flowering plants (angiosperms), which are enclosed during pollination. Gymnosperm seeds develop either on the surface of scale- or leaf-like appendages of cones, or at the end of short stalks (Ginkgo). The gymnosperms and angiosperms together comprise the spermatophytes or seed plants. By far the largest group of living gymnosperms are the conifers (pines, cypresses, and relatives), followed by cycads, Gnetales (Gnetophyta, Ephedra and Welwitschia), and Ginkgo (a single living species).

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

Neuralethopteris schlehanii		ZŠ483
Neuralethopteris schlehanii		ZŠ482
Neurocallipteris neuropteroides	Šimůnek (2022), PL. 2, Fig. 4	ZŠ884
Neurocallipteris planchardii		ZŠ741
Neurocallipteris planchardii	Šimůnek a Martínek (2009), Pl. 2, fig. 2	ZŠ179
Neurocallipteris planchardii	Šimůnek et al. (2017), Pl. 2, fig. 3	ZŠ628
Neurocallipteris planchardii	Šimůnek at al. (2017), Pl. 2, fig. 4	ZŠ630
Neurocallipteris planchardii	Šimůnek et al. (2017), Pl. 2, fig. 3	ZŠ629
Neurodontopteris auriculata	Šimůnek (1998), Pl. I, fig. 1	ZŠ61
Neurodontopteris auriculata	Šimůnek (2022), PL. 7, Fig. 1	ZŠ892
Neuropteris acutifolia Bret		WA177
Neuropteris acutifolia Bret		WA181
Neuropteris cordata	Šimůnek (2004), fig. 2-5	ZŠ79
Neuropteris cordata		ZŠ80
Neuropteris cordata	Šimůnek (2004), fig. 2-5	ZŠ78
Neuropteris cordata		ZŠ536
Neuropteris flexuosa Sternberg		WA167
Neuropteris gigantea		p4645
Neuropteris heterophylla		WA137
Neuropteris macrophylla Gopp		WA206

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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]