Icacinoxylon kokubunii

Name

Icacinoxylon kokubunii

Rank

Species

Generic Name

[Genus] Icacinoxylon

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

281

Year

2003

Fossil Status

stems (wood)

Stratigraphy

Turonian

Strat. comment

Member MI-Mo, Middle part of the Yezo Group

Location

66-rinpan-sawa, Obira-cho, Rumoi County, Hokkaido, Japan

Paleoregion

Eurasia (Japanese Archipelago)

Data for Holotypus

Repository

Botanical Garden, Tohoku University, Sendai, Japan

Repository Number

KK 94291

Num

26-29

Pub.

Dicotyledonous fossil wood flora and early evolution of wood characters in the Cretaceous of Hokkaido, Japan [2003]

Diagnosis

Growth rings absent. Wood diffuse-porous. Vessels very few, 4-9 (mean 6) per square mrn; mostly solitary (92%) and rarely in radial pairs; round, somewhat angular in cross section; 70-130 (mean 93) x 70-145 (mean 112) um in tangential x radial diameter; 580-1040 (mean 821) um in vessel element length; perforation plates exclusively scalariform with 5-35 bars; intervessel pits opposite to scalariform, elliptical, horizontally elongated, 6 x 3 pm in radial x vertical diameter; vessel-ray pits similar to intervessel pits. Imperforate tracheary elements fiber-tracheids with distinctly bordered pits. Axial parenchyma abundant, diffuse-in-aggregates, no crystalliferous elements observed. Rays uniseriate and multiseriate; uniseriate rays abundant (44%) and low; multiseriate rays large, up to 35 cells (630 um) wide and 14.4 mm high; multiseriate rays markedly heterocellular with 1-6 marginal uniseriate rows; uniseriate rays and uniseriate marginal rows of multiseriate rays composed of upright cells, 40 x 65 um in radial length x height; body of multiseriate rays composed of procumbent cells, 90 x 25 um in radial length x height; no crystalliferous elements observed.