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Isoetopsida

      The Isoetopsida is a class of the Lycopodiophyta. All living plants belong to the genus Selaginella in the Selaginellales or to Isoetes in the order Isoetales. In the past, members of this group have sometimes been placed in the class Isoetopsida, sometimes in the Selaginellopsida or Lycopodiopsida. There are about 700 species of Selaginella and 140-150 species of Isoetes, with a cosmopolitan distribution but often scarce to rare. Some botanists split Isoetes, separating two South American species into the genus Stylites. Some workers prefer the name Selaginellopsida A.B. Frank 1877, which has priority over the name Isoetopsida; the latter was not published until 1885. However, priority does not apply above the rank of family. Recent articles favor the name Isoetopsida, since Selaginellopsida sometimes is ambiguously used. It may have the same membership as the Isoetopsida described here, or it may include only the order Selaginellales.

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


 

ZS_314
Lepidodendron subdichotomum ZŠ314
ZS_314a
Lepidodendron subdichotomum ZŠ314
WA107
Lepidostrobus lycopoditis WA107
WA99a
Lepidostrobus lycopoditis WA99
WA99
Lepidostrobus lycopoditis WA99
WA80
Lepidostrobus WA80
WA88
Lepidostrobus WA88
WA76
Lepidostrobus WA76
WA90
Lepidostrobus variabilis WA90
p5104
Stigmaria ficoides p5104

In the Virtual Museum there are total 83 samples

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