Pleuromeiaceae is an extinct family of plants related to living quillworts (''
Isoetes''), in the order
Isoetales
Isoetales, sometimes also written Isoëtales, is an order of plants in the class Lycopodiopsida.
There are about 140-150 living species, all of which are classified in the genus '' Isoetes'' (quillworts), with a cosmopolitan distribution, but ...
but with tall stems and terminal compact cones. They were especially widespread globally during the Early and Middle Triassic in the aftermath of the
Permian-Triassic mass extinction.
References
Prehistoric plant families
Prehistoric lycophytes
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