Calamitaceae

{{Short description|Extinct family of horsetails}} {{Automatic taxobox | fossil_range = {{Geological range/linked|Carboniferous|Permian}} | image = Annularia Stellata.jpg | image_caption = ''Annularia stellata'' | taxon = Calamitaceae | authority = Unger, 1840{{citation needed|date=December 2019}} | subdivision_ranks = Genera | subdivision = See text }}

'''Calamitaceae''' is an extinct family of equisetalean plants related to the modern horsetails, known from the Carboniferous and Permian periods.<ref name="Elgorriaga 2018">{{cite journal |last1=Elgorriaga |first1=A. |first2=I.H. |last2=Escapa |first3=G.W. |last3=Rothwell |first4=A.M.F. |last4=Tomescu |first5=N.R. |last5=Cúneo |year=2018 |title=Origin of Equisetum: Evolution of horsetails (Equisetales) within the major euphyllophyte clade Sphenopsida |journal=American Journal of Botany |volume=105 |pages=1286–1303 |pmid=30025163 |doi=10.1002/ajb2.1125 |issue=8|doi-access=free }}</ref> Some members of this family like ''Arthropitys'' attained tree-like stature, with heights over {{Convert|15|m|ft}}, with extensive underground rhizomes. They were largely found in wetland environments.<ref>{{Cite journal |last1=Rößler |first1=Ronny |last2=Feng |first2=Zhuo |last3=Noll |first3=Robert |date=October 2012 |title=The largest calamite and its growth architecture — Arthropitys bistriata from the Early Permian Petrified Forest of Chemnitz |url=https://linkinghub.elsevier.com/retrieve/pii/S0034666712002102 |journal=Review of Palaeobotany and Palynology |language=en |volume=185 |pages=64–78 |doi=10.1016/j.revpalbo.2012.07.018|bibcode=2012RPaPa.185...64R |url-access=subscription }}</ref>

== Proposed genera and species of Calamitaceae == [[File:Asterophyllites Equisetiformis.jpg|thumb|''Asterophyllites equisetiformis'']] * ''Annularia''. ** ''A. stellata''. * ''Arthropitys''. * ''Asterophyllites'' (or incorrectly ''Asterophyllum''). * ''Astromyelon''. [[File:Calamites sp.1 - Carbonifero.JPG|thumb|''Calamites'']] * ''Calamites''. ** ''C. carinatus''. ** ''C. suckowi''. ** ''C. undulatus''. * ''Calamocarpon''. * ''Calamostachys''. ** ''C. binneyana''. * ''Cingularia''. * ''Mazostachys''. * ''Paleostachya''.

==References== {{Reflist}}

== External links == * [http://www.ucmp.berkeley.edu/plants/sphenophyta/calamitaceae.html Link to information and pictures]

Category:Equisetales Category:Carboniferous plants Category:Prehistoric plant families Category:Fern families Category:Carboniferous first appearances Category:Carboniferous extinctions