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Ginkgo cranei
Ginkgo cranei Z.-Y. Zhou, C. Quan, Y.-S. Liu Int. J. Pl. Sci., 173(1): 69. Jan 2012
- Name
- Ginkgo cranei
- Rank
- Species
- Generic Name
- [Genus] Ginkgo
- Authors (Pub.)
- Zhou Z.-Y.
Quan C.
Liu Y.-S.
- Publication
- Tertiary Ginkgo ovulate organs with associated leaves from North Dakota, U.S.A., and their evolutionary significance [2012/1]
- Journal
- International Journal of Plant Sciences
- Volume
- 173
- Issue
- 1
- Page number
- 69
- Year
- 2012
- Fossil Status
- twigs (ovulate)
- Stratigraphy
- Paleocene
- Strat. comment
- Sentinel Butte Formation
- Location
- Almont, North Dakota, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- University of Wisconsin at Stevens Point, Stevens Point, USA
- Repository Number
- UWSP42706
Data for Paratypus
- Repository
- Field Museum, Chicago, USA
- Repository Number
- PP34187
- Diagnosis
- Ginkgo cranei is distinguished from Ginkgo
biloba in its smaller seeds (seed 10–19 mm 3 12–17 mm vs.
30 mm 3 20 mm; stone 8–15 mm 3 7–12 mm vs. 21 mm 3
15 mm) and in having a characteristic seed integument cuticle
consisting of epidermal cells with domelike, thickened
periclinal walls and flange-developed anticlinal walls (instead
of less bulging periclinal walls and less developed anticlinal
wall flanges, as in the extant species). Stomata complexes are
fewer and sparser than in G. biloba, mostly amphicyclic and
with nonpapillate subsidiary cells, differing from those usually
monocyclic and sometime with papillate subsidiary cells
in the extant species. The leaves associated with G. cranei
ovules can also be distinguished from G. biloba by having
fewer stomata and less papillate epidermal and subsidiary
cells.