Biology:Karkeniaceae

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Short description: Extinct family of seed-bearing plants

Karkeniaceae
Temporal range: Hettangian–Aptian
Karkenia henanensis.jpg
Leaves and seeds of Karkenia henanensis (centre) with Yimaia recurva (top right)
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Ginkgophyta
Class: Ginkgoopsida
Order: Ginkgoales
Family: Karkeniaceae
Krassilov, 1972
Genera

Karkenia Archangelsky, 1965

Karkeniaceae is an extinct family in the order Ginkgoales. It contains the single genus Karkenia. It is distinguished by "Ovulate organs consisting of a peduncle and helically arranged, up to about 100 small, orthotropous but incurved ovules; pedicel present; nucellus largely free." Unlike other ginkgoales, the seeds are borne on cone-like aggregations. Ovuluate organs of Karkenia are associated with leaves of the Ginkgoites, Sphenobaiera and Eretmophyllum types. It is known from the Hettangian to Aptian of both Hemispheres.[1]

References

Wikidata ☰ Q6371286 entry