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Alienopteris livingstonensis
Alienopteris livingstonensis E.I. Vera Cretac. Res., 30(2): 402. Apr 2009
- Name
- Alienopteris livingstonensis
- Rank
- Species
- Generic Name
- [Genus] Alienopteris
- 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
- Fossil Status
- stems
- Stratigraphy
- Aptian
- Strat. comment
- Cerro Negro Formation
- Location
- West of the Rotch Dome, Byers Peninsula, Livingston Island, South
Shetland Islands, Antarctica
- Paleoregion
- Antarctica
Data for Holotypus
- Repository
- Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires, Buenos Aires, Argentina
- Repository Number
- BA Pb 14950 (BA Pb Pm 548, 549, 550)
Data for Paratypus
- Repository
- Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires, Buenos Aires, Argentina
- Repository Number
- BA Pb 14953 (BA Pb Pm 552)
- Diagnosis
- Stem pith sclerenchymatous at the center and
parenchymatous at the periphery; stele of the petiole bases
composed by an adaxial arch formed by five small meristeles,
central W-shaped and lateral V-shaped; abaxial arch composed of
two bilaterally symmetrical units, each one composed of an adaxial
meristele, highly corrugated, and with the tips pointing inwards,
and a smaller meristele J-shaped, perpendicular to the symmetry
axis; latter two meristeles can be fused; ground tissue with scattered
sclerotic nests and secretory cavities.
