Parthenocissus rhombifolia (Ettingsh.) Kovar-Eder

Plant Fossil Names Registry Number: PFN003322

Act LSID: urn:lsid:plantfossilnames.org:act:3322

Author: J. Kovar-Eder

Rank: species

Basionym: Acer rhombifolium Ettingsh.

Reference for this name: Kovar-Eder, J. (2024): Plant diversity at the final stage of the Miocene Climate Optimum - Revision of the flora of Leoben, Styria, Austria. – Acta Palaeobotanica 264(2): 123–286.

Page of description: 159

Types for basionym

Original diagnosis/description

Flügelfrucht und Blatt. Erstere charakterisirt sich durch den schmalen Flügel, die unter sehr spitzem Winkel eingefügten feinen und genäherten Flügelnerven und die kleine rundliche Frucht. Das hieher gestellte Blatt ist rhombisch, nach beiden Enden gleichmäßig verschmälert, am Rande grobgezahnt, von deutlich derber lederartiger Textur. Die beiden seitlichen Basalnerven bilden mit dem Mediannerv sehr spitze Winkel.
Die Secundär- und Aüßennerven gehen unter Winkel von 30 bis 35° ab. Das Blatt nähert sieh am meisten dem von Acer sclerophyllum Heer, von dem es nur in der Form abweicht.

Emended diagnosis

Elliptic to obovate, somewhat asymmetrical (?) leaflet, base acute; margin entire near base, then asymmetrically simple serrate with few, big teeth; teeth bigger on one side than on the other; tooth shape variable, sinus angular, apex bluntly acute, (?) glandular; venation basal acrodromous with 3 major veins, near margin a further, more delicate vein developed; angle between major veins 25–30°; central main vein running into leaf apex, lateral main veins running into tooth apices; secondaries irregularly, widely spaced, angle of origin moderate, course straight to slightly curved, ending in tooth apices; branches of two adjacent secondaries may run into one tooth, merging in its apex; exmedial veinlets arising from lateral major veins and secondaries or their branches looping along margin; further venation reticulate.

Etymology

Referring to the laminar shape.

Stratigraphy

Neogene, Miocene
Shales ~8.2 m above the coal seam , 14.9 ± 0.7 Ma (a tuff layer near the base of the shales overlying the coal seam)

Locality

Austria
Moskenberg near Leoben, Leoben Basin, Styria