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- 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 types. It is known from the Hettangian to Aptian of both Hemispheres. (en)
- Karkeniaceae — вимерла родина ряду ґінкоподібних (Ginkgoales). Він містить єдиний рід Karkenia. Відомий від геттангу до апту обох півкуль. (uk)
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- 1462 (xsd:nonNegativeInteger)
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- Leaves and seeds of Karkenia henanensis with Yimaia recurva (en)
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- Karkenia Archangelsky, 1965 (en)
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- 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 types. It is known from the Hettangian to Aptian of both Hemispheres. (en)
- Karkeniaceae — вимерла родина ряду ґінкоподібних (Ginkgoales). Він містить єдиний рід Karkenia. Відомий від геттангу до апту обох півкуль. (uk)
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- Karkeniaceae (en)
- Karkeniaceae (uk)
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