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Symphaenale
Genus Symphaenale Mas. Takah., Friis, P.R. Crane Int. J. Pl. Sci., 168(3): 342. 27 Mar 2007
- Name
- Symphaenale
- Rank
- Genus
- Authors (Pub.)
- Takahashi M.
Friis E. M.
Crane P. R.
- Publication
- Fossil seeds of Nymphaeales from the Tamayama Formation (Futaba Group), Late Cretaceous (Early Santonian) of Northeastern Honshu, Japan [2007/3]
- Journal
- International Journal of Plant Sciences
- Volume
- 168
- Issue
- 3
- Page number
- 342
- Year
- 2007
- Parent Taxon
- [Order] Nymphaeales
- Fossil Status
- seeds
- Type
- Symphaenale futabensis
- Diagnosis
- Seeds anatropous and ovoid, sometimes slightly pointed at the micropylar-hilum end. Raphe indistinct from outside, entering the seeds obliquely in a subterminal position and extending for almost the full length of the seed. Hilum separate from, but adjacent to, the micropyle. Micropylar area marked by a distinct plug with a papillate surface. Exotesta composed of columnar sclerenchyma cells with anticlinal walls that are straight toward the inside of the seed, but irregularly folded toward the outside resulting in a jigsaw puzzle–like cell pattern on seed surface. The resulting deeply digitate outer facets of the columnar sclerenchyma each have 9–11 lobes.
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