Ettingshausenia sarbaensis

Name

Ettingshausenia sarbaensis

Rank

Species

Generic Name

[Genus] Ettingshausenia

Authors (Pub.)

Maslova N. P. Shilin P. V.  

Publication

Novyj vid Ettingshausenia sarbaensis (Angiospermae) iz senoman-turona Zapadnogo Kazakhstana v svete problemy klassifikatsii melovykh dispersnykh list'jev platanovogo oblika [2011]

Journal

Paleontologicheskii Zhurnal

Annee/Jahrgang

2011

Issue

4

Page number

99

Year

2011

Fossil Status

leaves

Stratigraphy

Cenomanian

Strat. comment

Turonian - Zhirkindekian suite

Location

Sarbaj, western Kazakhstan

Paleoregion

Eurasia (Central Asia)

Data for Holotypus

Repository

Institute of Botany, Academy of Sciences of the Republic of Kazakhstan, Almaty, Kazakhstan

Repository Number

417/33

Num

fig. 1, а; 3, а

Pub.

Novyj vid Ettingshausenia sarbaensis (Angiospermae) iz senoman-turona Zapadnogo Kazakhstana v svete problemy klassifikatsii melovykh dispersnykh list'jev platanovogo oblika [2011]

Diagnosis

Leaf lamina entire or slightly lobed, rhomboid. Leaf base widely wedge-shaped, decurrent, occasionally peltate. Leaf blade apex acuminate. Lobes small, triangular. Leaf margin and sinuses between the lobes toothed. Teeth usually small, triangular, concave- concave to convexconcave, with rounded glandules. Venation palinactinodromous, craspedodromous. Secondary veins weakly arching, three to four pairs, their endings often angulate. Short veins are inserted between secondary veins. Basal veins alternate or opposite. Infrabasal veins up to two pairs. Tertiary veins angulate, orthogonally reticulate, scalariform or branching scalariform. Leaves hypostomous. Cells of the costal zone in lon gitudinal rows, from square to strongly elongate. Cuticle of upper leaf surface relatively thick, finely folded, with radial folds diverging from trichome bases. Ordinary epidermal cells of upper leaf surface polygonal, isodiametric or slightly oblong. Anticlinal walls straight, frequently sinuous. Ordinary epidermal cells of lower leaf surface polygonal, usually oblong, anticlinal walls sinuous. Stomata widely broadly oval or circular, encyclocytic, incomplete amphicyclocytic, laterocytic, or, rarely, paracytic. Subsidiary cells specialized, smaller than ordinary epidermal cells, radial, with strongly cutinized periclinal walls, which often fuse into continuous rim folded perpendicular to long axis of stoma. Trichomes develop on one or from two to five ordinary epidermal cells. Trichome bases quite cutinized, round or oval in plan.