Caytoniales Temporal range:
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Fig.1 A whole-plant reconstruction of Caytonia nathorstii[1] | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Division: | †Pteridospermatophyta |
Order: | †Caytoniales Gothan, 1932 |
Family: | †Caytoniaceae Kräusel, 1926 |
Form genera | |
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The Caytoniales (Figs. 1-2) are an extinct order of seed plants known from fossils collected throughout the Mesozoic Era, around 252 to 66 million years ago.[2][3][4] They are regarded as seed ferns because they are seed-bearing plants with fern-like leaves.[4] Although at one time considered angiosperms because of their berry-like cupules,[5] that hypothesis was later disproven.[6] Nevertheless, some authorities consider them likely ancestors or close relatives of angiosperms.[7] The origin of angiosperms remains unclear, and they cannot be linked with any known seed plants groups with certainty.
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