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Ginkgo glinkiensis
Ginkgo glinkiensis An.O.Frolov, Mashchuk Jursk. Fl. Rastit. Irkutsk. Ugol'n. Bass. 189. 2018
- Name
- Ginkgo glinkiensis
- Rank
- Species
- Generic Name
- [Genus] Ginkgo
- Authors (Pub.)
- Frolov A. O.
Mashchuk I. M.
- Publication
- Jurskaya flora i rastitel'nost' Irkutskogo ugol'nogo basseyna [2018]
- Authors (Book)
- Frolov A. O.
Mashchuk I. M.
- Book
- Jurskaya flora i rastitel'nost' Irkutskogo ugol'nogo basseyna
- Page number
- 189
- Year
- 2018
- Fossil Status
- foliage
- Stratigraphy
- Lower Jurassic
- Strat. comment
- Cheremkhovo Formation
- Location
- Glinki coal deposit, 2 km north of the Glinki village, Irkutsk Coal Basin, Irkutsk region, Russian Federation
- Paleoregion
- Eurasia (Siberia)
Data for Holotypus
- Repository
- Institute of the Earth's Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russian Federation
- Repository Number
- Gl-2010-73/15
Data for Paratypus
- Repository
- Institute of the Earth's Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russian Federation
- Repository Number
- № Гл-2010-73/1, Гл-2010-76/3-1
- Diagnosis
- Leaves fan-shaped, long-petiolar. Middle incision comes to petiole, divides
the leaf blade into two petiolar symmetrical lobes. Petiole length of lobes is 5–15 (usually 6–8) mm. The following two incisions devide the lobes into four short (5–8 mm) petiolar lobes. There are 4–8 terminal leaf lobes. They are linear lance-shaped 6–7 mm wide. Leaves are amphistomatic. Upper epidermis is composed of short and isodiametric cells. Their anticlinal walls are flat. All of the cells bear median papilla. Single stomata are regularly present on the upper epidermis. They are very rarely arranged without forming rows. The lower epidermis is differentiated into broad stomatal and narrow (without stomata) bands. Bands are composed of 7–10 rows of narrow elongate and spindle-like cells. Trichomic structures in the cells are absent. Stomatal bands are composed of short and isodiametric cells. Most of the cells bear median wart or papilla. For the stomata width there are 5−7 stomatal complexes, which do not differ from ordinary cells of epidermis in the degree of cutinization; they feature edge papillae. Guard cells are not deepened.
Nomenclatural synonyms (basionyms)
Species
