Equicalastrobus

Equicalastrobus; Temporal range: Carnian,; ~237–227.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N I O An. La. Carn. Norian Rh.
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Subclass:	Equisetidae
Order:	Equisetales
Family:	Equisetaceae
Genus:	†Equicalastrobus; Grauvogel-Stamm and Ash
Species:	†E. chinleana
Binomial name
	†Equicalastrobus chinleana; (Daugherty) Grauvogel-Stamm and Ash

Equicalastrobus is an extinct genus of plant related to horsetails from the late Carnian. It is known only from cones found in the Chinle Formation. It was initially described as part of the genus Lycostrobus before being reassigned to the genus Equicalastrobus. It may represent an intermediate stage between Calamites and Equisetum.

References

↑ Grauvogel-Stamm, Le´a; Ash, Sidney R. (1 October 1999). ""Lycostrobus" chinleana, an equisetalean cone from the Upper Triassic of the southwestern United States and its phylogenetic implications". American Journal of Botany. 86 (10): 1391–1405 – via Botanical Society of America.

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[1] Grauvogel-Stamm, Le´a; Ash, Sidney R. (1 October 1999). ""Lycostrobus" chinleana, an equisetalean cone from the Upper Triassic of the southwestern United States and its phylogenetic implications". American Journal of Botany. 86 (10): 1391–1405 – via Botanical Society of America.