PBDB Taxon

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Equisetales

Polypodiopsida - Equisetales

Taxonomy

Equisetales was named by Dumortier (1829) [Author and name made up to test system]. It is extant.

It was assigned to Equisetophyta by Upchurch et al. (1994); to Pteridophyta by Knowlton (1919) and Ash (1999); to Sphenopsida by Jain and Delevoryas (1967), Hickey (1977), Holmes (1982), Lapasha and Miller (1985) and Chatterjee et al. (2013); to Equisetidae by I (2016); and to Equisetopsida by Jud (2011) and Procopio Rodríguez et al. (2024).

Synonymy list

Year	Name and author
1829	Equisetales Dumortier p. 66
1919	Equisetales Knowlton
1967	Equisetales Jain and Delevoryas
1977	Equisetales Hickey
1982	Equisetales Holmes
1985	Equisetales Lapasha and Miller
1994	Equisetales Upchurch et al.
1999	Equisetales Ash
2011	Equisetales Jud
2013	Equisetales Chatterjee et al.
2016	Equisetales I
2024	Equisetales Procopio Rodríguez et al. pp. 305-306

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Rank	Name	Author
kingdom	Plantae
phylum	Pteridophyta
class	Polypodiopsida

Rank	Name	Author
subclass	Equisetidae	Warm 1883
order	Equisetales	Dumortier 1829
order	Equisetales	Dumortier 1829

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Or. Equisetales Dumortier 1829

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G. †Angaroradix Khakhlov 1964

†Angaroradix bellis Khakhlov 1964

G. †Annularia Sternberg 1821

†Annularia spinulosa Sternberg 1821

Invalid names: Rotularia Sternberg 1825 [synonym], Trochophyllum Wood 1861 [objective synonym]

G. †Annulariopsis Zeiller 1903

†Annulariopsis bunkeiensis Kobatake 1954

†Annulariopsis inopinata Zeiller 1903

G. †Annulina Neuberg 1954

Fm. †Archaeocalamitaceae

G. †Pothocites Paterson 1844

†Pothocites grantonii Paterson 1844

G. †Barakaria Seward and Sahni 1920

†Barakaria dichotoma Feistmantel 1881

G. †Borisiella Khakhlov 1964

†Borisiella bella Khakhlov 1964

Fm. †Calamitaceae

G. †Arthrodendron Seward 1898

G. †Arthropityostachys Renault 1896

†Arthropityostachys borgiensis Renault 1896

G. †Arthropitys Goeppert 1864

†Arthropitys bistriata Cotta 1864

G. †Asterophyllites Brongniart 1828

†Asterophyllites charaeformis Goeppert 1844

†Asterophyllites radiatus Brongniart 1822

Invalid names: Schlotheimia Sternberg 1822 [synonym]

G. †Asterophyllostachys Schimper 1880

†Asterophyllostachys binneyana Schimper 1880

G. †Asthenomyelon Leistikow 1962

†Asthenomyelon adversale Leistikow 1962

G. †Calamitea Cotta 1832

†Calamitea striata Cotta 1832

G. †Calamites Suckow 1784

Subg. †Calamites (Mesocalamites) Hirmer 1927

†Mesocalamites roemeri Goeppert 1850

†Calamites aliwalensis Anderson and Anderson 1985

†Calamites goepperti Ettingshausen 1854

†Calamites radiatus Brongniart 1828

†Calamites suckowii Brongniart 1828

†Calamites undulatus Sternberg 1825

G. †Calamitina Weiss 1876

†Calamitina goepperti Ettingshausen 1876

G. †Calamitomyelon Lignier 1910

†Calamitomyelon morierei Lignier 1910

G. †Calamocarpon Baxter 1963

†Calamocarpon insignis Baxter 1963

G. †Calamocladus Schimper 1869

†Calamocladus longifolius Brongniart 1869

G. †Calamodendrea Grand'Eury 1877

†Calamodendrea rhizobola Grand'Eury 1877

G. †Calamodendrofloyos Grand'Eury 1877

†Calamodendrofloyos cruciatus Sternberg 1877

G. †Calamodendron Brongniart 1849

†Calamodendron striatum Brongniart 1849

G. †Calamodendrophyllum Grand'Eury 1879

†Calamodendrophyllum bifurcatum Grand'Eury 1879

G. †Calamodendroxylon Grand'Eury 1877

†Calamodendroxylon striatum Cotta 1877

G. †Calamophloios Arber 1916

†Calamophloios rugosus Arber 1916

G. †Calamostachys Schimper 1869

†Calamostachys typica Schimper 1869

G. †Coleophyllites Grand'Eury 1877

†Coleophyllites zeaeformis Schlotheim 1820

G. †Haplocalamus Unger 1856

†Haplocalamus thuringiacus Unger 1856

G. †Metacalamostachys Hirmer 1927

†Metacalamostachys palaeacea Stur 1927

G. †Myelocalamites Grand'Eury 1877

†Myelocalamites approximatus Schlotheim 1828

G. †Nematophyllites Miller 1892

†Nematophyllites angustus Fontaine and White 1880

Invalid names: Nematophyllum Fontaine and White 1880 [replaced]

G. †Neocalamites Halle 1908

†Neocalamites foxii Lele 1955

†Neocalamites hoerensis Schimper 1908

†Neocalamites knowltoni Berry 1912

†Neocalamites virginiensis Fontaine 1883

G. †Pinnularia Lindley and Hutton 1834

†Pinnularia capillacea Lindley and Hutton 1834

G. †Protocalamites Goebel 1906

†Protocalamites scrobiculatus Schlotheim 1820

G. †Pseudobornia Nathorst 1894

†Pseudobornia ursina Nathorst 1894

G. †Zimmermannioxylon Leistikow 1962

†Zimmermannioxylon multangulare Leistikow 1962

G. †Corynophyllites Zalessky 1937

†Corynophyllites setiformis Zalessky 1937

Fm. Equisetaceae De Candolle 1804

G. †Equicalastrobus Grauvogel-Stamm and Ash 1999

†Equicalastrobus glabratus Procopio Rodríguez et al. 2024

G. †Equisetites Sternberg 1833

†Equisetites conicus Sternberg 1833

†Equisetites keuperina Morton 1863

†Equisetites mougeoti Brongniart 1828

†Equisetites pusillus Villar de Seoane 2005

G. Equisetum Linnaeus 1753 [horsetail]

†Equisetum abiquiense Fontaine 1890

†Equisetum arcticum Heer 1866

Equisetum arvense Linnaeus 1753

†Equisetum burchardti Dunker 1846

Invalid names: Equisetum marylandicum Fontaine 1889 [synonym], Equisetum virginicum Fontaine 1889 [synonym]

†Equisetum canaliculatum Knowlton 1899

†Equisetum cascadensis Lapasha and Miller 1985

†Equisetum collieri Knowlton 1914

†Equisetum columnare Brongniart 1828

†Equisetum deciduum Knowlton 1899

†Equisetum florissantense Cockerell 1915

Equisetum fluviatile Linnaeus 1753

†Equisetum globulosum Lesquereux 1882

†Equisetum haguei Knowlton 1899

†Equisetum haydenii Lesquereux 1871

†Equisetum knowltoni Fontaine 1890

†Equisetum laevigatum Braun 1867

†Equisetum lesquereuxii Knowlton 1898

†Equisetum lyellii Mantell

†Equisetum magnum Hickey 1977

†Equisetum meriani Brongniart 1828

†Equisetum mokhotlongensis Ellenberger 1970

†Equisetum montanense Fontaine 1898

†Equisetum muensteri Sternberg 1833

†Equisetum newberryi Knowlton and Cockerell 1919

Invalid names: Equisetum robustum Newberry 1863 [replaced]

†Equisetum oregonense Newberry 1882

Invalid names: Equisetum hornii Lesquereux 1888 [synonym]

†Equisetum parlatorii Heer 1855

†Equisetum perlaevigatum Cockerell 1889

Invalid names: Equisetum laevigatum Lesquereux 1873 [synonym]

†Equisetum phillipsii Dunker 1843

†Equisetum rajmahalense Oldham and Morris 1863

†Equisetum robustum Braun 1844

†Equisetum rogersii Bunbury 1851

Invalid names: Calamites arenaceus Emmons 1856 [synonym], Calamites disjunctus Emmons 1856 [synonym], Equisetum arundiniforme Rogers 1843 [synonym], Equisetum columnaroides Emmons 1856 [synonym], Phytolithus striaticulmis Martin 1809 [synonym]

Equisetum scirpoides Michaux 1803

†Equisetum similkamense Dawson 1878

Equisetum sylvaticum Linnaeus 1753

†Equisetum texense Fontaine 1893

†Equisetum wyomingense Lesquereux 1873

G. †Schizoneura Schimper and Mougeot 1844

†Schizoneura gondwanensis Feistmantel 1879

†Schizoneura paradoxa Schimper and Mougeot 1844

†Schizoneura planicostata Rogers 1843

†Schizoneura raniganjense Banerjee 1972

†Schizoneura wardii Zeiller 1902

G. †Equisetophyton Schweitzer 1972