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Pteridopsida
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The Pteridopsida is a class of plants in the Division Pteridophyta that includes all the leptosporangiate ferns. In the recent 2006 classification by Smith et al. the class is renamed Polypodiopsida. This recent reclassification of Monilophyte (ferns) is based on multiple molecular studies published since 1994 that have clarified some of the confusion of the placement and relations among fern families. Polypodiopsida is one of four classes of Monilophytes (an Infradivision, this rank is not recognized by the International Code of Botanical Nomenclature), the other three being Marattiopsida, Equisetopsida, and Psilotopsida.
ClassificationThe classification scheme proposed by Smith et al.(alternative names in brackets):
- Order Osmundales
- Order Hymenophyllales
- Family Hymenophyllaceae (incl. Trichomanaceae)
- Order Gleicheniales
- Family Gleicheniaceae (incl. Dicranopteridaceae, Stromatopteridaceae)
- Family Dipteridaceae (incl. Cheiropleuriaceae)
- Family Matoniaceae
- Order Schizaeales
- Family Lygodiaceae
- Family Anemiaceae (incl. Mohriaceae)
- Family Schizaeaceae
- Order Salviniales
- Family Marsileaceae (incl. Pilulariaceae)
- Family Salviniaceae (incl. Azollaceae)
- Order Cyatheales
- Family Thyrsopteridaceae
- Family Loxomataceae
- Family Culcitaceae
- Family Plagiogyriaceae
- Family Cibotiaceae
- Family Cyatheaceae (incl. Alsophilaceae, Hymenophyllopsidaceae)
- Family Dicksoniaceae (incl. Lophosoriaceae)
- Family Metaxyaceae
- Order Polypodiales
- Family Lindsaeaceae (incl. Cystodiaceae, Lonchitidaceae)
- Family Saccolomataceae
- Family Dennstaedtiaceae (incl. Hypolepidaceae, Monachosoraceae, Pteridiaceae)
- Family Pteridaceae (incl. Acrostichaceae, Actiniopteridaceae, Adiantaceae, Anopteraceae, Antrophyaceae, Ceratopteridaceae, Cheilanthaceae, Cryptogrammaceae, Hemionitidaceae, Negripteridaceae, Parkeriaceae, Platyzomataceae, Sinopteridaceae, Taenitidaceae, Vittariaceae)
- Family Aspleniaceae
- Family Thelypteridaceae
- Family Woodsiaceae (incl. Athyriaceae, Cystopteridaceae)
- Family Blechnaceae (incl. Stenochlaenaceae)
- Family Onocleaceae
- Family Dryopteridaceae (incl. Aspidiaceae, Bolbitidaceae, Elaphoglossaceae, Hypodematiaceae, Peranemataceae)
- Family Lomariopsidaceae (incl. Nephrolepidaceae)
- Family Tectariaceae
- Family Oleandraceae
- Family Davalliaceae
- Family Polypodiaceae (incl. Drynariaceae, Grammitidaceae, Gymnogrammitidaceae, Loxogrammaceae, Platyceriaceae, Pleurisoriopsidaceae)
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