Ginkgoopsida

Ginkgoopsida is a proposed class of gymnosperms defined by Sergei V. Meyen in 1984 to encompass Ginkgoales (which contains the living Ginkgo) alongside a number of extinct seed plant groups, which he considered to be closely related based on similarities of morphology of pollen, seeds, cuticles, short shoots and leaves. Ginkgoopsida originated in Gondwana. After the mass extinction of this organism, some of these have appeared to have survived in southern Gondwana and are preserved in lower Paleogene strata in Tasmania. The Ginkgoaceae are a part of reinous, and dioecious trees. The characteristics of these trees include mycorrhiza (fungal) roots, long trunks with countless branches, and simple flabelliform (fan-shaped) leaves. The leaves from these trees were traditionally used for medicinal purposes. They were utilized to prevent inflammation disorders and also valuable for food as they act as antioxidants. [1][2][3] The monophyly of this group as a whole has been considered questionable by other authors.[4] Other authors have used the class as a monotypic grouping, including only Ginkgoales.[5]

Ginkgoopsida
Temporal range:
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnosperms
Division: Ginkgophyta
Class: Ginkgoopsida
Meyen
Proposed orders

References

Simpson, M. G. (2010). Evolution and Diversity of Woody and Seed Plants. In Plant Systematics (pp. 129–162). Academic Press,. https://doi.org/10.1016/B978-0-12-374380-0.50005-1 Škrovánková Soňa (2012). Antioxidant Activity and Protecting Health Effects of Common Medicinal Plants - sciencedirect. (n.d.). https://www.sciencedirect.com/science/article/pii/B9780123945983000034

/B9780123945983000034

  1. SV Meyen, Basic features of gymnosperm systematics and phylogeny as shown by the fossil record. Bot Rev 50, 1–111 (1984).
  2. Meyen, Sergei V. (January 1987). "Evolution of Ginkgoopsida: from Peltaspermales to Ginkgoales, Leptostrobales and Caytoniales". Bulletin de la Société Botanique de France. Actualités Botaniques. 134 (2): 67–76. doi:10.1080/01811789.1987.10826864. ISSN 0181-1789.
  3. Herrera, Fabiany; Shi, Gongle; Ichinnorov, Niiden; Takahashi, Masamichi; Bugdaeva, Eugenia V.; Herendeen, Patrick S.; Crane, Peter R. (2017-03-21). "The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales". Proceedings of the National Academy of Sciences. 114 (12): E2385–E2391. doi:10.1073/pnas.1621409114. ISSN 0027-8424. PMC 5373332. PMID 28265050.
  4. Beck, Charles B. (July 1985). "Gymnosperm Phylogeny — A commentary on the views of S. V. Meyen". The Botanical Review. 51 (3): 273–294. doi:10.1007/BF02861076. ISSN 0006-8101. S2CID 7535841.
  5. Yang, Yong; Ferguson, David Kay; Liu, Bing; Mao, Kang-Shan; Gao, Lian-Ming; Zhang, Shou-Zhou; Wan, Tao; Rushforth, Keith; Zhang, Zhi-Xiang (July 2022). "Recent advances on phylogenomics of gymnosperms and a new classification". Plant Diversity. 44 (4): 340–350. doi:10.1016/j.pld.2022.05.003. PMC 9363647. PMID 35967253.
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