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Magnoliaceoxylon hokkaidoense
Magnoliaceoxylon hokkaidoense K. Takah., Mits. Suzuki I.A.W.A. J., 24(3): 284. 2003
- Name
- Magnoliaceoxylon hokkaidoense
- Rank
- Species
- Generic Name
- [Genus] Magnoliaceoxylon
- 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
- 284
- Year
- 2003
- Fossil Status
- stems (wood)
- Stratigraphy
- Coniacian
- Strat. comment
- Member Ub, Upper part of the Yezo Group
- Location
- Obirashibe River, Obira-cho, Rumoi County, Hokkaido, Japan
- Paleoregion
- Eurasia (Japanese Archipelago)
Data for Holotypus
- Repository
- Botanical Garden, Tohoku University, Sendai, Japan
- Repository Number
- KK 94182
- Diagnosis
- Growth rings absent. Wood diffuse-porous. Vessels few, 11-25 (mean 16) per square mm; mostly solitary (87%) and sometimes in radial or tangential pairs; round to oval, somewhat angular in cross section; 20-60 (mean 45) x 30-90 (mean 63) um in tangential x radial diameter; 440-890 (mean 661)
Jlm in vessel element length; perforation plates exclusively scalariform with 12-47 bars; intervessel pits opposite to scalariform, elliptical, elongated horizontally (30 x 2 um in radial x vertical diameter), vessel-ray pits scalariform. Imperforate tracheary elements fiber-tracheids with distinctly bordered pits. Axial parenchyma diffuse and rarely scanty paratracheal, no crystalliferous elements observed. Rays up to 4 cells (90 um) wide; 140 um-l.4 mm high; markedly heterocellular with 1-4 marginal rows of upright or square cells; procumbent cells 45 x 25 um in radial length x height; upright cells 35 x 45 #m in radial length x height; uniseriate rays rare; crystalliferous element s almost absent, and rarely present.
