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Related to Cycadophyta: Coniferophyta
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Noun1.Cycadophyta - palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta)
class - (biology) a taxonomic group containing one or more orders
class Gymnospermae, division Gymnospermophyta, Gymnospermae, Gymnospermophyta - plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)
Cycadales, order Cycadales - primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms
Bennettitales, order Bennettitales - fossil gymnospermous plants of the Carboniferous
References in periodicals archive ?
familias provincial generos provincial Pteridophyta 10 48 13 33 Pinophyta 1 100 1 100 Cycadophyta 1 100 1 100 Magnoliophyta 105 78 340 53 Magnoliopsida 91 -- 253 -- Liliopsida 12 -- 59 -- Totales 117 64 355 53 Divisiones No.
Most classification systems today separate the extant gymnosperms into four distinct divisions: Coniferophyta, Cycadophyta, Ginkgophyta, and Gnetophyta (Flora of North America, 1993b).
Table 1 Publications in conservation genetics (1980-2010) performed on Austral and Neotropical America (ANA) Publications Proportion in Taxonomic groups (N) Kingdom Plantae (%) Kingdom Plantae 303 Division Chlorophyta (algae) 1 <1 Rhodophyta (algae) 2 <1 Cycadophyta 7 2.