Ostryoxylon gokceadaense Akkemik

Plant Fossil Names Registry Number: PFN002209

Act LSID: urn:lsid:plantfossilnames.org:act:2209

Author: Ü. Akkemik

Rank: species

Reference: Akkemik, Ü. (2021): A re-examination of the angiosperm wood record from the early and middle Miocene of Turkey, and new species descriptions. – Acta Palaeobotanica 61(1): 42–94.

Page of description: 52

Illustrations or figures: pl. 4


Holotype GOK02, Department of Forest Botany, Faculty of Forestry, Istanbul University-Cerrahpasa, Istanbul, Turkey
Figures: pl. 4

Note: Holotype: Three thin sections of specimen GOK02.

Original diagnosis/description

Growth ring boundaries distinct with 1–2 rows of marginal fibre cells. Wood diffuse-porous, and vessels arranged in radial multiples of 2–4 or more (up to 13 vessels). Mean tangential diameter of vessel lumina less than 50 μm. Vessel frequency 50–100 per mm2. Helical thickening on vessels very common. Axial parenchyma present and diffuse (Pl. 4A, B). Ray width 1–4-seriate, aggregate rays not observed. Rays per mm per mm2 ≥12. Maximum ray height up to 71 cells (Pl. 4C). Intervessel pits mostly alternate and opposite, circular in shape (Pl. 4E, F). Perforation plates simple (Pl. 4G). Rays heterocellular; body ray cells procumbent with mostly 1–4 rows of upright and/or square marginal cells (Pl. 4H).

PFNR Administrator note: mm2 to be read as square mm (our text box does not allow upper index).


The epithet “gokceadaense” derives from the origin of the sample, Gökçeada (Imbros), an island in the Aegean Sea.


Neogene, Miocene
Kesmekaya Volcanics, middle Miocene


East of Eşelek village – Gökçeada, near coastline

Plant fossil remain

fossil wood


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