Baiera telmensis

Name

Baiera telmensis

Rank

Species

Generic Name

[Genus] Baiera

Authors (Name)

Frolov A. O.  

Authors (Pub.)

Frolov A. O. Mashchuk I. M.  

Publication

New discoveries and new combinations of the fossil-genus Ginkgoites Seward (Ginkgoales) from the Lower and Middle Jurassic of East Siberia (Russia) [2022/9]

Journal

Phytotaxa

Volume

567

Issue

1

Page number

185

Year

2022

Fossil Status

foliage

Stratigraphy

Lower Jurassic

Strat. comment

Prisayanskaya Formation, loverprisayanskaya Subformation

Location

right bank of the Angara River, opposite the Tel’ma railroad station, Irkutsk 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

№ 2011-9/46

Num

XXVIII, fig. 1–10; tabl. XXIХ, fig. 1–5

Pub.

New discoveries and new combinations of the fossil-genus Ginkgoites Seward (Ginkgoales) from the Lower and Middle Jurassic of East Siberia (Russia) [2022/9]

Diagnosis

Leaves are broad-cuneate, long-stalked, deeply dissected into 12 narrow linear lobes. Leaves are hypostomatic. Venation is not expressed. Cells of upper surface are smaller than cells of lower epidermis. Upper surface of epidermis is composed of wide forms of elongated cells and isodiametric cells with straight periclinal walls and distinct small wart on anticlinal walls. Lower epidermis is composed of wide forms of elongated cells and isodiametric cells with straight periclinal walls. Many cells bear poorly pronounced small warts. Large-oval stomata with asymmetric folded contour are randomly distributed. Subsidiary stomatal cells do not differ in degree of cutinization from ordinary cells and bear poorly pronounced median small warts. Proximal walls of subsidiary cells form cuticular ring around stomatal pit.