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Gangamopteris walkomii
Gangamopteris walkomii Rigby Rec. Austral. Mus., 27(8): 175. 26 Apr 1967
- Name
- Gangamopteris walkomii
- Rank
- Species
- Generic Name
- [Genus] Gangamopteris
- Authors (Pub.)
- Rigby J. F.
- Publication
- On Gangamopteris walkomii sp. nov. [1967/4]
- Journal
- Records of the Australian Museum
- Volume
- 27
- Issue
- 8
- Page number
- 175
- Year
- 1967
- Parent Taxon
- [Genus] Gangamopteris
- Fossil Status
- foliage
- Stratigraphy
- Permian
- Strat. comment
- Lithgow Coal Measures
- Location
- Duncan's Pass, Narrow Neck, near Katoomba, New South Wales, Australia
- Paleoregion
- Gondwana (Australia)
Data for Holotypus
- Repository
- Australian Museum, Sydney, Australia
- Repository Number
- F43563
- Diagnosis
- Leaves obovate, becoming elliptical then rhombic at maturity; apex obtuse to rounded; leaf base narrowing gradually to a short, thick petiole; margin entire; primary venation absent in the mature leaf, secondary venation dichotomously branching and anastomosing forming elongate reticulate meshes arising from a central region of strongly developed parallel veins, or a midrib in the developing leaf; venation strongly arcuate intersecting margin in the upper third at 90 degrees, varying to less than 30 degree near petiole. Leaves arising from a closely packed spiral as tufts along a stem of unknown identity; abcission apparently occurring before the number of leaves exceeded 12 or slightly more, although leaves grew from more than one point along the stem at anyone time. No stem elongation occurring after expansion of leaves of short shoots. Short shoot branching from within axil of leaf on shoot of unlimited growth. Stomata absent from adaxial leaf surface.
