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Ginkgo gomolitzkyana
Ginkgo gomolitzkyana Nosova Paleobot., 3: 64. 2012
- Name
- Ginkgo gomolitzkyana
- Rank
- Species
- Generic Name
- [Genus] Ginkgo
- Authors (Pub.)
- Nosova N. V.
- Publication
- Zhenskie reproduktivnye struktury Ginkgo gomolitzkyana N. Nosova, sp. nov. iz sredneyurskikh otlozhenij Angrena (Uzbekistan) [2012]
- Journal
- Paleobotanika
- Volume
- 3
- Page number
- 64
- Year
- 2012
- Fossil Status
- seeds
- Stratigraphy
- Middle Jurassic
- Strat. comment
- Angrenian suite
- Location
- Tashkent region, Angren, Uzbekistan
- Paleoregion
- Eurasia (Central Asia)
Data for Holotypus
- Repository
- Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russian Federation
- Repository Number
- 821/45-15(1)
- Diagnosis
- Ovule attached to pedicel with a collar. Collar diameter 2,5—4,5 mm. Stomata on the outer
collar surface numerous — 65—75 per 1 mm2
. Subsidiary cells lacking papillae. Aperture walls of the subsidiary cells often thickened forming a cuticular rim around the aperture. Seeds rounded to ovate in outline
with rounded base and pointed apex. Ovule (seed) length 5,3—9,2 mm, width 4—7,5 mm. Thickness of the
sarcotesta 0,25—0,65 mm. Thickness of the outer cuticle of the integument 1,0—5,5 μm. Stomata sparse —
2—12 per 1 mm2
. Most of subsidiary cells lacking papillae, occasionally stomata with proximal papillae occur. Aperture walls of the subsidiary cells often thickened forming a cuticular fold around the aperture. Anticlinal cell walls straight, periclinal smooth. Epidermal cells of nucellus elongated with rounded corners.
Megaspore membrane 2—5 μm thick. Patterned layer is composed of bacula arranged obliquely or parallel
to the foot layer, branching and connected to one another to form a network.
