Isoetes beestonii

Isoetes beestonii
Temporal range:
Complete plant of Isoetes beestonii from latest Permian Coalcliff Sandstone in South Bulli Colliery, NSW, Australia.
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Lycophytes
Class: Lycopodiopsida
Order: Isoetales
Family: Isoetaceae
Genus: Isoetes
Species:
†I. beestonii
Binomial name
†Isoetes beestonii
Retallack

Isoetes beestonii is a species of isoetalan plant from the latest Permian of New South Wales and Queensland. Originally considered earliest Triassic, it is now known to be latest Permian in age, immediately before the Permian Triassic mass extinction. It has been suggested to be the earliest member of the genus Isoetes, which contains living quillworts, though it differs from living Isoetes in some aspects, with modern forms of Isoetes possibly emerging during the Jurassic.

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