Yimaia
| Yimaia Temporal range: | |
|---|---|
| Restoration of Yimaia recurva from the Jurassic of China | |
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Ginkgophyta |
| Class: | Ginkgoopsida |
| Order: | Ginkgoales |
| Family: | †Yimaiaceae Zhou, 1997 |
| Genus: | †Yimaia Zhou et Zhang, 1988 |
| Species | |
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Yimaia is an extinct genus of Ginkgoalean tree, and the only member of the family Yimaiaceae. In botanical form classification, its a form taxon for ginkgoalean ovulate organs. Yimaia species are distinguished from other Ginkgoales by the presence of "Ovulate organs consisting of a peduncle and up to eight or nine terminal, sessile, contiguous and orthotropous (straight, upright and with a micropyle at apex) ovules." The ovules are associated with leaves of either Baiera or Ginkgoites leaf morphospecies. Fossils have been found in Middle Jurassic deposits in China.