Wilkinsoniphyllum menispermoides Jud, Gandolfo, A.Iglesias et Wilf in Jud, Iglesias, Wilf & Gandolfo

Plant Fossil Names Registry Number: PFN001752

Act LSID: urn:lsid:plantfossilnames.org:act:1752

Authors: N. A. Jud, M. A. Gandolfo, A. Iglesias & P. Wilf

Rank: species

Genus: Wilkinsoniphyllum Jud, Gandolfo, A.Iglesias et Wilf in Jud, Iglesias, Wilf & Gandolfo

Reference: Jud, N. A., Iglesias, A., Wilf, P. & Gandolfo, M. A. (2018): Fossil moonseeds from the Paleogene of West Gondwana (Patagonia, Argentina). – American Journal of Botany 105(5): 927–942.

Page of description: 932

Illustrations or figures: figs 4 (A–D)

Name is type for

Types

Original diagnosis/description

Leaf simple, petiolate with an upper pulvinus; blade attachment marginal; blade simple, wide ovate; base concavo-convex, obtuse; apex rounded, obtuse, mucronate; margin entire. Primary venation suprabasal actinodromous; central primary slightly wider than lateral primaries; lateral primaries ascending about two-thirds the distance to apex into apical half of lamina; secondary vein framework brochidodromous, secondary veins excurrent, ascending from the central primary with the lowermost pair diverging near the middle of the blade, central secondary veins alternate, simple agrophic veins present; tertiary vein framework alternate percurrent; fourth to sixth order vein framework regular polygonal reticulate; areoles regular, polygonal, lacking freely ending veinlets; fimbrial vein present.

Etymology

The epithet “menispermoides” refers to the similarities between this fossil leaf and those extant in the family Menispermaceae.

Stratigraphy

Paleogene, Paleocene, Danian
early Danian (early Paleocene), Salamanca Formation, Chron C29n (65.69–64.96 Ma)

Locality

Argentina
Palacio de los Loros-1 (PL-1), Chubut Province