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Calamitaceae; Temporal range: Carboniferous–Permian PreꞒ Ꞓ O S D C P T J K Pg N
	Annularia stellata
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Subclass:	Equisetidae
Order:	Equisetales
Family:	†Calamitaceae; Unger, 1840[citation needed]
Genera
	See text

Calamitaceae is an extinct family of equisetalean plants related to the modern horsetails, known from the Carboniferous and Permian periods.^[1] Some members of this family like Arthropitys attained tree-like stature, with heights over 15 metres (49 ft), with extensive underground rhizomes. They were largely found in wetland environments.^[2]

Proposed genera and species of Calamitaceae

Annularia.
- A. stellata.
Arthropitys.
Asterophyllites (or incorrectly Asterophyllum).
Astromyelon.

Calamites.
- C. carinatus.
- C. suckowi.
- C. undulatus.
Calamocarpon.
Calamostachys.
- C. binneyana.
Cingularia.
Mazostachys.
Paleostachya.

References

^ Elgorriaga, A.; Escapa, I.H.; Rothwell, G.W.; Tomescu, A.M.F.; Cúneo, N.R. (2018). "Origin of Equisetum: Evolution of horsetails (Equisetales) within the major euphyllophyte clade Sphenopsida". American Journal of Botany. 105 (8): 1286–1303. doi:10.1002/ajb2.1125. PMID 30025163.
^ Rößler, Ronny; Feng, Zhuo; Noll, Robert (October 2012). "The largest calamite and its growth architecture — Arthropitys bistriata from the Early Permian Petrified Forest of Chemnitz". Review of Palaeobotany and Palynology. 185: 64–78. doi:10.1016/j.revpalbo.2012.07.018.

External links

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[Elgorriaga_2018-1] Elgorriaga, A.; Escapa, I.H.; Rothwell, G.W.; Tomescu, A.M.F.; Cúneo, N.R. (2018). "Origin of Equisetum: Evolution of horsetails (Equisetales) within the major euphyllophyte clade Sphenopsida". American Journal of Botany. 105 (8): 1286–1303. doi:10.1002/ajb2.1125. PMID 30025163.

[2] Rößler, Ronny; Feng, Zhuo; Noll, Robert (October 2012). "The largest calamite and its growth architecture — Arthropitys bistriata from the Early Permian Petrified Forest of Chemnitz". Review of Palaeobotany and Palynology. 185: 64–78. doi:10.1016/j.revpalbo.2012.07.018.

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