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. They are regarded as seed ferns because they are seed-bearing plants with fern-like leaves. Although at one time considered angiosperms because of their berry-like cupules, that hypothesis was later disproven. Nevertheless, some authorities consider them likely ancestors or close relatives of angiosperms. The origin of angiosperms remains unclear, and they cannot be linked with any known seed plants groups with certainty.
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| - Caytoniales (en)
- Caytoniales (de)
- Caytoniales (in)
- Caytoniales (it)
- Kajtoniowce (pl)
- 开通目 (zh)
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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. They are regarded as seed ferns because they are seed-bearing plants with fern-like leaves. Although at one time considered angiosperms because of their berry-like cupules, that hypothesis was later disproven. Nevertheless, some authorities consider them likely ancestors or close relatives of angiosperms. The origin of angiosperms remains unclear, and they cannot be linked with any known seed plants groups with certainty. (en)
- Die Caytoniales sind eine mesozoische Ordnung der ausgestorbenen Pflanzengruppe der Samenfarne. Ihre Samen sind in Cupula genannten Strukturen eingeschlossen, sodass sie systematisch vielfach in die Nähe der Bedecktsamer gestellt werden. (de)
- Le caytoniali (Caytoniales) sono un ordine di piante estinte di incerta collocazione sistematica, vissute nell'era Mesozoica tra il Triassico superiore e il Cretaceo superiore (220 - 65 milioni di anni fa). (it)
- Kajtoniowce (Caytoniales) – wymarły rząd paproci nasiennych, najstarsze znaleziska pochodzą z triasu, a najmłodsze z kredy. (pl)
- 开通目（学名：Caytoniales）是已滅絕的種子蕨門下的一目。這類植物的根、茎不详，主要保存下来的化石是叶和生殖器官，它們曾被认为是被子植物的祖先。 (zh)
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| - Fig.1 A whole-plant reconstruction of Caytonia nathorstii (en)
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| subdivision
| - *Caytonanthus ( pollen organ)
*Caytonia (ovulate structure)
*Sagenopteris (palmate leaves)
*Reymanownaea( pollen organ) (en)
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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. They are regarded as seed ferns because they are seed-bearing plants with fern-like leaves. Although at one time considered angiosperms because of their berry-like cupules, that hypothesis was later disproven. Nevertheless, some authorities consider them likely ancestors or close relatives of angiosperms. The origin of angiosperms remains unclear, and they cannot be linked with any known seed plants groups with certainty. (en)
- Die Caytoniales sind eine mesozoische Ordnung der ausgestorbenen Pflanzengruppe der Samenfarne. Ihre Samen sind in Cupula genannten Strukturen eingeschlossen, sodass sie systematisch vielfach in die Nähe der Bedecktsamer gestellt werden. (de)
- Le caytoniali (Caytoniales) sono un ordine di piante estinte di incerta collocazione sistematica, vissute nell'era Mesozoica tra il Triassico superiore e il Cretaceo superiore (220 - 65 milioni di anni fa). (it)
- Kajtoniowce (Caytoniales) – wymarły rząd paproci nasiennych, najstarsze znaleziska pochodzą z triasu, a najmłodsze z kredy. (pl)
- 开通目（学名：Caytoniales）是已滅絕的種子蕨門下的一目。這類植物的根、茎不详，主要保存下来的化石是叶和生殖器官，它們曾被认为是被子植物的祖先。 (zh)
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