Nagrenia leviana

Name

Nagrenia leviana

Rank

Species

Generic Name

[Genus] Nagrenia

Authors (Pub.)

Nosova N. V.  

Publication

New findings of the female reproductive structures of Nagrenia Nosova (Ginkgoales) and the seeds of Ginkgo gomolitzkyana Nosova from the Middle Jurassic of Angren, Uzbekistan [2016/12]

Journal

Review of Palaeobotany and Palynology

Annee/Jahrgang

2017

Volume

239

Page number

4

Year

2016

Fossil Status

reproductive organs (seed)

Stratigraphy

Middle Jurassic

Strat. comment

Angren Formation

Location

Angren, Tashkent viloyat, Uzbekistan

Paleoregion

Eurasia (Central Asia)

Data for Holotypus

Repository

Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russian Federation

Repository Number

spec. 823/26

Num

Plate V, 1–6, 15, 17; Plate VI, 3, 5–8, 12, 13; Pl

Pub.

New findings of the female reproductive structures of Nagrenia Nosova (Ginkgoales) and the seeds of Ginkgo gomolitzkyana Nosova from the Middle Jurassic of Angren, Uzbekistan [2016/12]

Diagnosis

Female reproductive structure consisting of a plicate pedicel, gradually expanding into a cup-shaped collar with smooth collar rim. Conical protrusion with a round hole at the top of the collar inner surface. Anticlinal cell walls straight to irregularly thickened; the periclinal ones smooth to convex, sometimes with flattened to the hollow papilla. Sometimes with stomata on the pedicel and inner surface of the collar, stomata more common on the outer surface of the collar. Subsidiary cells without papillae.