Baiera is a genus of prehistoric gymnosperms in the order Ginkgoales.[2] It is one of the oldest fossil foliage types of Ginkgoales,[3] and is related to the genera Ginkgo and Ginkgoites. Fossils of Baiera are found worldwide, and have been known from the Permian to the Cretaceous.

Baiera
Temporal range: 298.9–94.3 Ma [1] PermianCretaceous
Baiera gracilis fossil
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Ginkgophyta
Class: Ginkgoopsida
Order: Ginkgoales
Family: Ginkgoaceae
Genus: Baiera
Braun [de], 1843
Species

Baiera africana
Baiera darleyensis
Baiera digitata
Baiera gracilis
Baiera mansfeldensis
Baiera muensteriana

Description

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Artist's reconstruction of Baiera.

Baiera species are characterized by fan-shaped leaves,[4] are deeply lobed into four segments,[5] deeply incised into slender segments,[4] and are distinguished from Sphenobaiera by a petiole.[4]

B. africana is characterized by its symmetrical and triangular leaves.[6]

Classification

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Karl Friedrich Wilhelm Braun first introduced the name Baiera in 1843 to refer to fossils in Germany that he interpreted as ginkgophytes.[7] In 1936, Carl Rudolf Florin used Baiera to refer to leaves with a distinct stalk or petiole and with a semicircular or triangular shape.[7]

Placement of Baiera

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Gerd Dietl and Günter Schweigert (2011) place Baiera in the family Ginkgoaceae,[2] while a 2015 classification by Andriy Novikoff and Beata Barabasz-Krasny places it in the Karkeniaceae.[8][9]

References

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  1. ^ "Fossilworks: Baiera". fossilworks.org.
  2. ^ a b "Fossilworks: Baiera". fossilworks.org. Retrieved 17 December 2021.
  3. ^ Guignard, Gaëtan; Yang, Xiao-Ju; Wang, Yong-Dong (2019-09-01). "Cuticle ultrastructure of Baiera furcata from Northeast China and its implication in taxonomy and paleoenvironment". Review of Palaeobotany and Palynology. 268: 95–108. Bibcode:2019RPaPa.268...95G. doi:10.1016/j.revpalbo.2019.05.006. ISSN 0034-6667. S2CID 199103806.
  4. ^ a b c Pott, Christian & Burgh, J. & van Konijnenburg-van Cittert, Johanna. (2016). New Ginkgophytes from the Upper Triassic–Lower Cretaceous of Spitsbergen and Edgeøya (Svalbard, Arctic Norway): The History of Ginkgoales on Svalbard. International Journal of Plant Sciences. 177. 175-197. 10.1086/684194.
  5. ^ "Ginkgophyte | plant division". Encyclopedia Britannica. Retrieved 2018-02-03.
  6. ^ Barboni, Ronaldo; Dutra, Tânia Lindner (November 2015). "First record of Ginkgo-related fertile organs (Hamshawvia, Stachyopitys) and leaves (Baiera, Sphenobaiera) in the Triassic of Brazil, Santa Maria formation". Journal of South American Earth Sciences. 63: 417–435. Bibcode:2015JSAES..63..417B. doi:10.1016/j.jsames.2015.08.001.
  7. ^ a b Bauer, K.; Kustatscher, E.; Krings, M. (2013). "The ginkgophytes from the German Kupferschiefer (Permian), with considerations on the taxonomic history and use of Baiera and Sphenobaiera". Bulletin of Geosciences: 539–556. doi:10.3140/bull.geosci.1394 – via Core.
  8. ^ "IRMNG - Baiera C.F.W. Braun, 1843 †". www.irmng.org. Retrieved 2021-05-09.
  9. ^ Novikoff, Andrew; Barabasz-Krasny, Beata (2015). Modern plant systematics. Liga-Pres. doi:10.13140/RG.2.1.4745.6164.