Almargemia

{{Automatic taxobox

| image = 12862 2017 943 Fig1 HTML.webp

| image_alt =

| image_caption =

| fossil_range = {{Geological range/linked|Early Cretaceous}}

| taxon = Almargemia

| authority = Florin 1933{{Cite book|last=Florin|first=Carl Rudolf|title=Studien uber die Cycadales des Mesozoikums nebst Erorterngen uber die Spaltoffnungsapparate der Bennettitales.|publisher=K. Svenska Vetensk. Acad. Handl.|year=1933|isbn=|location=|pages=}}

| subdivision_ranks = Species

| subdivision = * A. dentata (Type species)

}}

Almargemia is a genus of fossil leaves from the Early Cretaceous of Portugal produced by members of the Zamiaceae. It was erected by Rudolf Florin based on macrofossil material with preserved cuticle.{{Cite book|last=Florin|first=Carl Rudolf|title=Studien uber die Cycadales des Mesozoikums nebst Erorterngen uber die Spaltoffnungsapparate der Bennettitales.|publisher=K. Svenska Vetensk. Acad. Handl.|year=1933|isbn=|location=|pages=}}

Taxonomy

The material on which it is based was first described by Oswald Heer under the name Ctenidium dentatum and C. integerrimum.{{Cite book|last=Heer|first=Oswald|title=Contributions à la flore fossile du Portugal.|publisher=J. Wurster|year=1881|isbn=|location=|pages=}} Later, the cuticle was described by Florin, who transferred the material to the newly erected genus Almargemia.

Description

The leaflets of Almargemia have few parallel veins that do not fuse together. The leaflet margin have large, lobe-like teeth. The cuticle has elongated pavement cells, with some pavement cells having a dark-stained cuticles. The stomata are sunken in a stomatal pit.

References

Category:Zamiaceae

Category:Prehistoric gymnosperm genera

Category:Cretaceous plants