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Paraphyllanthoxylon obiraense
Paraphyllanthoxylon obiraense K. Takah., Mits. Suzuki I.A.W.A. J., 24(3): 289. 2003
- Name
- Paraphyllanthoxylon obiraense
- Rank
- Species
- Generic Name
- [Genus] Paraphyllanthoxylon
- 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
- 289
- Year
- 2003
- Fossil Status
- stems (wood)
- Stratigraphy
- Santonian
- Strat. comment
- Member Uf-Uk, Upper part of the Yezo Group
- Location
- Araki-sawa, Obira-cho, Rumoi County, Hokkaido, Japan
- Paleoregion
- Eurasia (Japanese Archipelago)
Data for Holotypus
- Repository
- Botanical Garden, Tohoku University, Sendai, Japan
- Repository Number
- TK 98141
- Diagnosis
- Growth rings absent. Wood diffuse-porous, Vessels common, 22-36 (mean 27) per square mm; solitary (52%) and in radial multiples of 2-5; round in cross section; 65-130 (mean 93) x 70-140 (mean 96) um in tangential x radial diameter; 230-370 (mean 298) pm in vessel element length; tyloses
abundant; perforation plates exclusively simple; intervessel pits alternate, round to oval (10 x 7 um in radial x vertical diameter), horizontally elongated; vessel-ray pits simple, large, round to oval (12 um in diameter), horizontally or vertically elongated. Imperforate tracheary elements fibers with no pits, septa not observed (N.B.: but absence of septa is likely due to poor preservation). Axial parenchyma moderately abundant, vasicentric, no crystalliferous elements observed. Rays up to 3 cells (60 um) wide; 240 um-1.1 mm high ; heterocellular; procumbent cells 70 x 25 pm in radiallength x height; upright cells 25 x 50 pm in radial length x height; uniseriate rays rare; no crystalliferous elements observed.
