Pterocaryoxylon tuncayi Ü. Akkemik in Akkemik, Akkılıç & Güngör

Plant Fossil Names Registry Number: PFN000544


Author: Ü. Akkemik (as Ü. Akkemik)

Rank: species

Reference: Akkemik, Ü., Akkılıç, H. & Güngör, Y. (2019): Fossil wood from the Neogene of the Kilyos coastal area in Istanbul, Turkey. – Palaeontographica, Abt. B 299(1–6): 133–185.

Page of description: 144

Illustrations or figures: text-fig. 4, pl. 7


Holotype DAL12, Department of Forest Botany, Faculty of Forestry, Istanbul University-Cerrahpasa, Istanbul, Turkey
Figures: text-fig. 4, pl. 7, figs 4, 5

Note: Paratypes: DAL11 (pl. 7, figs 1, 3), KIL04 (pl. 7, fig. 2) housed in Laboratory of Wood Anatomy and Dendrochronology, Faculty of Forestry, Istanbul University-Cerrahpasa, Istanbul, Turkey.

Original diagnosis/description

Growth ring boundaries indistinct or distinct, wood semi-ring to diffuse porous, 5–20 cells per mm2, vessel diameters 100–200 µm, perforation plates simple, helical thickenings common in vessel elements, axial parenchyma diffuse, commonly in tangential bands up to three cells wide, and scanty paratracheal. Rays 1–3 seriate, up to 29 cells in height, body ray cells procumbent with 1–4 rows of square or wider marginal cells; prismatic crystals in chambered axial parenchyma cells common.


The epithet tuncayi is given in honour of Dr. Tuncay Güner, an acknowledged palaeobotanist working on fossil plants in Turkey.


Neogene, Miocene, Burdigalian
Ağaçlı Member of Danişmen Formation, early Miocene

Note: Burdigalian age specified by Ü. Akkemik to PFNR.


Black Sea coast (Dalyan beach) of the city of Kilyos of Istanbul, 1° 15′ 02.06″ N and 29° 03′ 54.51″ E

Plant fossil remain

fossil wood



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