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Plataninium jezoense
Plataninium jezoense K. Takah., Mits. Suzuki I.A.W.A. J., 24(3): 293. 2003
- Name
- Plataninium jezoense
- Rank
- Species
- Original spelling
- jezoensis
- Generic Name
- [Genus] Plataninium
- Authors (Pub.)
- Takahashi K.
Suzuki M.
- Publication
- Dicotyledonous fossil wood flora and early evolution of wood characters in the Cretaceous of Hokkaido, Japan [2003]
- Journal
- IAWA Journal
- Volume
- 24
- Issue
- 3
- Page number
- 293
- Year
- 2003
- Fossil Status
- stems (wood)
- Stratigraphy
- Cenomanian
- Strat. comment
- Member Mf, Middle part of the Yezo Group
- Location
- Kabano-sawa, Obira-cho, Rumoi County, Hokkaido, Japan
- Paleoregion
- Eurasia (Japanese Archipelago)
Data for Holotypus
- Repository
- Botanical Garden, Tohoku University, Sendai, Japan
- Repository Number
- CR 96041
- Diagnosis
- Growth rings indistinct, delineated by radially flattened fiber-tracheids and a slight difference of vessel diameter between late wood and early wood. Wood diffuse-porous. Vessels numerous, 45-57 (mean 50.6) per square mm; solitary (76%) and in radial or tangential pairs; round to oval in cross section ; 65-115 (mean 83) x 80-145 (mean 103) pm in tangential x radial diameter; 500 -1150 (mean 802) pm in vessel element length; perforation plates exclusively scalariforrn with 9-29 bars; intervessel pits opposite, almost round, 3 pm in diameter; vessel-ray pits sirnilar to intervessel pits. Imperforate tracheary elements fiber-tracheids with distinctly bordered pits.
Axial parenchyma very abundant, diffuse-in-aggregates, no crystalliferous elements observed. Rays rarely uniseriate (6%), mostly multiseriate; uniseriate rays low; multiseriate rays large, up to 30 cells (555 pm) wide and 6.3 mm high; homocellular composed of all procumbent cells, 110 x 30 um in radial length x height; no crystalliferous elements observed.
