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Holigarna palaeograhamii
Holigarna palaeograhamii Anum. Shukla, R.C. Mehrotra, S.N. Ali J. Asian Earth Sci., 166: 153. 23 Jul 2018
- Name
- Holigarna palaeograhamii
- Rank
- Species
- Generic Name
- [Genus] Holigarna
- Authors (Pub.)
- Shukla A.
Mehrotra R. C.
Ali S. N.
- Publication
- Early Eocene leaves of northwestern India and their response to climate
change [2018/7]
- Journal
- Journal of Asian Earth Sciences
- Volume
- 166
- Page number
- 153
- Year
- 2018
- Fossil Status
- leaves
- Stratigraphy
- Ypresian
- Strat. comment
- Palana Formation
- Location
- Gurha lignite mine (East), Bikaner district, Rajasthan, India
- Paleoregion
- Eurasia (Indostan)
Data for Holotypus
- Repository
- Birbal Sahni Institute of Palaeosciences, Lucknow, India
- Repository Number
- BSIP 41605
Data for Paratypus
- Repository
- Birbal Sahni Institute of Palaeosciences, Lucknow, India
- Repository Number
- BSIP 41606
- Diagnosis
- Leaf symmetrical, mesophyll, shape elliptic to narrow oblanceolate, preserved lamina length 8.7–11.3 cm, preserved width 4.4–6.5 cm; apex acuminate; base acute; margin entire; texture coriaceous; petiole normal; venation pinnate, mainly eucamptodromous but sometimes appearing brochidodromous due to percurrent tertiaries; primary vein stout in thickness, slightly curved; secondary veins 18–20 pairs visible, alternate to opposite, distance between two secondaries 0.5–1.0 cm, angle of divergence wide acute to right angle, right angle at the base but becoming wide acute as approaching upwards, uniform; intersecondary veins present; tertiary veins percurrent, simple, alternate to opposite, retroflexed; marginal ultimate venation looped; quaternary vein fabric irregular reticulate; areoles well developed, imperfect, predominantly quadrangular.
