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Lycaugea
Genus Lycaugea Mey.-Berth., Decombeix, Rom. Blanch. Int. J. Pl. Sci., 182(6): 000 [5] 423. 12 May 2021
- Name
- Lycaugea
- Rank
- Genus
- Authors (Pub.)
- Meyer-Berthaud B.
Decombeix A.-L.
Blanchard R.
- Publication
- Lycaugea edieae gen. et sp. nov., a Late Devonian lycopsid from New South Wales, Australia [2021/5]
- Journal
- International Journal of Plant Sciences
- Volume
- 182
- Issue
- 6
- Page number
- 000 [5] 423
- Year
- 2021
- Parent Taxon
- [Class] Isoetopsida
- Fossil Status
- stems (wood)
- Type
- Lycaugea edieae
- Diagnosis
- Axis with helically arranged deciduous leaves. Leaf bases showing a parichnos below a small leaf vascular trace. Leaf trace and parichnos located in the upper part of the leaf base. Parichnos in leaf bases large, filled with contiguous parenchyma cells showing thicker walls toward the outer region of the leaf bases. Primary vascular tissues consisting of a medullated stele. Protoxylem continuous, forming a thin ring with a smooth outer border around the metaxylem. Primary cortex three zoned, with a wide middle cortex and a homogeneous outer cortex bounded externally by a hypodermis consisting of narrow cells with heavily thickened walls. Leaf traces in the outer cortex associated with the radially elongated abaxial cavity of the parichnos.
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