Mayoa portugallica E.M.Friis, K.R.Pedersen et P.R.Crane

Plant Fossil Names Registry Number: PFN002765

Act LSID: urn:lsid:plantfossilnames.org:act:2765

Authors: E. M. Friis, K. R. Pedersen & P. R. Crane

Rank: species

Genus: Mayoa E.M.Friis, K.R.Pedersen et P.R.Crane

Reference: Friis, E. M., Pedersen, K. R. & Crane, P. R. (2004): Araceae from the Early Cretaceous of Portugal: Evidence on the emergence of monocotyledons. – Proceedings of the National Academy of Sciences of the United States of America 101(47): 16565–16570.

Page of description: 16568

Illustrations or figures: figs 1, 2

Name is type for

Types

Original diagnosis/description

Pollen inaperturate. Surface of pollen wall is striate with densely spaced ribs (muri) separated by narrow grooves (striae). Ribs are arranged in a distinctive pattern in which two sets of ribs each radiate from a pair of divergence points. Main axes of the two sets of ribs are at an angle of 45–90° to each other. Pollen wall is thin and consists of an outer exine of solid ribs supported by a very thin granular infratectal layer and an inner thin granular endexine that forms a continuous layer under the ribs.

Etymology

From Portugal where the fossil was collected.

Stratigraphy

Cretaceous, Lower Cretaceous
basal member of the Almargem Formation (Late Barremian or Early Aptian)

Locality

Portugal
Open-cast clay pit northeast of Torres Vedras (39°06′13″N, 9°14′47″W)