The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2022

IDNAME urn:idName:ifpni.org:species:D1626398-9C82-C43C-4A09-A3E7F9C97F0B species
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Ginkgo shiguaiensis

Ginkgo shiguaiensis C.-L. Sun, Dilcher, H.-S. Wang, Y.-H. Ge Int. J. Pl. Sci., 169(8): 1132. Oct 2008
Name
Ginkgo shiguaiensis
Rank
Species
Generic Name
[Genus] Ginkgo
Authors (Pub.)
Sun C.-L. Dilcher D. L. Wang H.-S. Ge Y.-H.  
Publication
A study of Ginkgo leaves from the Middle Jurassic of Inner Mongolia, China [2008/10]
Journal
International Journal of Plant Sciences
Volume
169
Issue
8
Page number
1132
Year
2008
Fossil Status
foliage
Stratigraphy
Middle Jurassic
Strat. comment
Zhaogou Formation
Location
Toudaogou-Erdaogou section, Shiguai Coal Mine, Inner Mongolia, China
Paleoregion
Eurasia (China)
Data for Holotypus
Repository
Research Center of Palaeontology and Stratigraphy, Jilin University, Changchun, China
Repository Number
S001
Data for Paratypus
Repository
Research Center of Palaeontology and Stratigraphy, Jilin University, Changchun, China
Repository Number
S003, S008, S009
Diagnosis
Leaf semiorbicular or fan shaped with a long and slender petiole. Basal angle of leaves 80–220. Lamina 30–40 mm long by 60–70 mm wide, usually divided into two halves, each half subdivided into two main lobes. Outer lobes usually deeply notched or divided into ultimate lobes. Lobe shape varying from lanceolate to narrow obovate with rounded or obtuse rounded apexes. Veins distinct, 10–12 per 5 mm. Leaf sparsely amphistomatic (only a few stomata on the upper epidermis). The thickness of cuticle on the upper and lower epidermis almost the same; thickenings uneven on periclinal and anticlinal walls of epidermal cells, no papillae or trichomes observed. Stomata similar on upper and lower epidermis, randomly oriented in stomatal zones. Cuticular thickenings present on anticlinal walls bordering the stomata and apparent cuticular striations extending out from the stomata. Conspicuous papillae present on subsidiary cells and extending over stomatal pit. Typically, four to six subsidiary cells surrounding the guard cells.

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