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- Corystospermaceae is a natural family of seed ferns (Pteridospermatophyta) also called Umkomasiaceae, and first based on fossils collected by Hamshaw Thomas from the Burnera Waterfall locality near the Umkomaas River of South Africa The leaves of Dicroidium were recognized by Alex Du Toit to unite all the countries of the Gondwana supercontinent during the Triassic: Africa, South America, India, and Australia. Subsequently, Dicroidium was found in the Triassic of Antarctica and New Zealand, and also the Permian Umm Irna Formation of Jordan. According to the form generic system of paleobotany, leaves are given separate generic names to ovulate and pollen organs, but the discovery of these reproductive organs in Africa by Thomas, and subsequently throughout Gondwana, strengthened Du Toit's concept of a continuous southern supercontinent. Corystospermaceae were also components of Jurassic and Cretaceous floras, declining in the Cretaceous presumably due to the rise of flowering plants, the last known representative of the group, Komlopteris cenozoicus, is known from the Eocene of Tasmania, at least 13 million years after the Cretaceous–Paleogene extinction event. (en)
- Corystospermaceae — викопна родина насінних папоротей, що існувала у Гондвані протягом пермського, тріасового та юрського періодів. Інколи в літературі вживається назва Umkomasiaceae. (uk)
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- 5155 (xsd:nonNegativeInteger)
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- Umkomasia macleanii reconstructed plant, Late Triassic, Molteno Formation, Umkomaas, South Africa. (en)
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- * Umkomasia ( ovulate structures)
* Pteruchus ( pollen organs)
* Dicroidium ( leaves)
* Johnstonia ( leaves)
* Xylopteris ( leaves)
* Kyklyxylon ( wood)
* Antarcticoxylon ( wood)
* Rhexoxylon ( wood) (en)
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- Corystospermaceae — викопна родина насінних папоротей, що існувала у Гондвані протягом пермського, тріасового та юрського періодів. Інколи в літературі вживається назва Umkomasiaceae. (uk)
- Corystospermaceae is a natural family of seed ferns (Pteridospermatophyta) also called Umkomasiaceae, and first based on fossils collected by Hamshaw Thomas from the Burnera Waterfall locality near the Umkomaas River of South Africa The leaves of Dicroidium were recognized by Alex Du Toit to unite all the countries of the Gondwana supercontinent during the Triassic: Africa, South America, India, and Australia. Subsequently, Dicroidium was found in the Triassic of Antarctica and New Zealand, and also the Permian Umm Irna Formation of Jordan. According to the form generic system of paleobotany, leaves are given separate generic names to ovulate and pollen organs, but the discovery of these reproductive organs in Africa by Thomas, and subsequently throughout Gondwana, strengthened Du Toit's c (en)
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- Corystospermaceae (en)
- Corystospermaceae (uk)
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