Archeampelos betulifolia M.Moiseeva, Kodrul et A.B.Herman

Plant Fossil Names Registry Number: PFN000356

Act LSID: urn:lsid:plantfossilnames.org:act:356

Authors: M. G. Moiseeva, T. M. Kodrul & A. B. Herman

Rank: species

Reference: Moiseeva, M. G., Kodrul, T. M. & Herman, A. B. (2018): Early Paleogene Boguchan flora of the Amur Region (Russian Far East): Composition, age and palaeoclimatic implications. – Review of Palaeobotany and Palynology 253: 15–36.

Page of description: 32

Illustrations or figures: fig. 5; pl. IV, figs 12, 13

Types

Original diagnosis/description

Leaves simple, palmately three-lobed, petiolate, leaf size mesophyll, length–width ratio almost 1:1. Lamina elliptical to ovate, symmetrical. Apices of lateral lobes directed upward; apex angle of lobes acute, apex shape straight. Base angle of leaf lamina reflex, base shape cordate. Primary venation basal actinodromous with five basal veins and compound agrophic veins. Major secondary veins (5–6 pairs) curved apically, alternate, craspedodromous or
semicraspedodromous with irregular spacing. Intersecondary veins occasionally present.
Leaf margin serrate or occasionally dentate. Tooth spacing regular with up to three orders of teeth and four to five teeth per cm. Sinus shape angular, tooth shapes typically convex/convex, sometimes flexuous/convex or straight/straight.

Etymology

Specific epithet indicates the similarity of leaf morphology to that of representatives of the family Betulaceae.

Stratigraphy

Paleogene, Paleocene
Middle Tsagayan subformation

Locality

Russian Federation
Arkhara–Boguchan coal field (Zeya–Bureya Depression, Amur River Region)