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Alienopteris
Genus Alienopteris E.I. Vera Cretac. Res., 30(2): 402. Apr 2009
- Name
- Alienopteris
- Rank
- Genus
- Authors (Pub.)
- Vera E. I.
- Publication
- Alienopteris livingstonensis gen. et sp. nov., enigmatic petrified tree fern stem (Cyatheales) from the Aptian Cerro Negro Formation, Antarctica [2009/4]
- Journal
- Cretaceous Research
- Volume
- 30
- Issue
- 2
- Page number
- 402
- Year
- 2009
- Parent Taxon
- [Subclass] Cyatheidae
- Fossil Status
- stems
- Type
- Alienopteris livingstonensis
- Diagnosis
- Stem upright, enclosed by two-layered sclerotic
hypodermis, covered by petiole bases and dense indument of
root traces and trichomes; cauline vasculature an amphiphloic
dictyostele; meristeles surrounded by sclerenchyma sheath, Yshaped
when not involved in the production of leaf traces; adjacent
meristeles fuse their proximal arms to initiate the production of
a leaf trace; medullary and cortical bundles absent.
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