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

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

In the Virtual Museum there are total 111 samples

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