Zelkovoxylon crystalliferum

Name

Zelkovoxylon crystalliferum

Rank

Species

Generic Name

[Genus] Zelkovoxylon

Authors (Pub.)

Akkemik Ü.  

Publication

A re-examination of the angiosperm wood record from the early and middle Miocene of Turkey, and new species descriptions [2021/6]

Journal

Acta Palaeobotanica

Volume

61

Issue

1

Page number

84

Year

2021

Fossil Status

stems (wood)

Stratigraphy

Burdigalian

Strat. comment

Hançili Formation

Location

near Aşağıgüney village, Beypazarı city, Ankara Province, Türkiye

Paleoregion

Eurasia (Anatolia)

Data for Holotypus

Repository

ISTO Herbarium, Faculty of Forestry, Istanbul University-Cerrahpaşa, Istanbul, Turkey

Repository Number

AGU15

Num

Pls 21A–D, 22A–D

Pub.

A re-examination of the angiosperm wood record from the early and middle Miocene of Turkey, and new species descriptions [2021/6]

Diagnosis

Wood ring-porous, growth ring boundaries distinct, with abrupt transition from earlywood to latewood. Earlywood vessels in 1–2 rows; vessel clusters and diagonals common in latewood. Vessel tangential and radial diameter both measure 50–100 µm and 100-200 µm in earlywood and >50 µm in latewood. Axial parenchyma paratracheal, mainly in vessel clusters of latewood. Rays 1–6-seriate, in two distinct sizes. Wider rays 4 (3–6)-seriate, generally 25–35 (–51) cells high; narrow rays (1–2-seriate) and generally 11–23 cells high. Rays homocellular with entirely procumbent ray cells and heterocellular with mostly procumbent body ray cells and 1–4 rows of upright and/or square marginal cells. Axial parenchyma in strands of 2–4 cells. Prismatic crystals extremely dense in axial parenchyma and in enlarged axial parenchyma cells, and in procumbent and upright cells of rays. Crystals appear as clusters in some rays. Perforation plates simple. Helical thickening common in latewood vessels and vascular/vasicentric tracheids.