Cercioxylon zeynepae AKKEMIK, 2019

Mackrodt, Ulrike, 2019, Validation Of Four New Plant Fossil Names From Turkey, Fossil Imprint 75 (2), pp. 289-291 : 290

Cercioxylon zeynepae AKKEMIK sp. nov.

Text-fig. 1b

H o l o t y p e. YIP02 ( Text-fig. 1b , and pls V – VI in Akkemik 2019 ). It is stored at the Department of Forest Botany, Faculty of Forestry, Istanbul University, Istanbul, Turkey .

P l a n t F o s s i l N a m e s R e g i s t r y N u m b e r.

PFN000548 (for new species).

E t y m o l o g y. The epithet zeynepae originates from the name Zeynep. I have used it to honor my wife, as she has been a most patient partner throughout my hard scientific life.

T y p e l o c a l i t y. Close to Yıprak Village of the city of Çerkeş, the province of Çankırı, Turkey .

T y p e h o r i z o n. Örencik Formation (Yörük

Member), Pliocene.

D i a g n o s i s. Wood semi-ring to ring porous. Vessels in short radial pattern up to 6 cells, and clusters common. Mean tangential and radial diameters of earlywood vessel lumina 84 (52–132) μm and 82 (32–135) μm, respectively, and their shapes almost circular, they are 30 (11–47) μm and 32 (12–48) μm in the latewood, respectively. Vessel frequency 40–100 per mm 2. Perforation plate simple. Fibers thin- to thick-walled. Axial parenchyma paratracheal to vasicentric and in confluent type, banded, and in dendritic to net-like groups with vessels, axial parenchyma storied, and 2–4 cells per parenchyma strands. Rays 1–5 (2–4) seriate, multiseriate ray height generally 18–27 (max. 56) cells, and uniseriate rays 5–15 cells. 6–12 rays per mm. All rays procumbent or body ray cells procumbent with one to four square marginal cells, vestured ray pits common ( Akkemik 2019 ).

R e m a r k s: For more detailed description and discussion see Akkemik (2019) .

Figures

Text-fig. 1. The petrified woods validated as new fossil-species. YIP01 and YIP02 from Akkemik (2019), and HAY02 and HAY05 from Akkemik et al. (2018). a) Cupressinoxylon pliocenica AKKEMIK sp. nov. No. YIP01 (holotype); b) Cercioxylon zeynepae AKKEMIK sp. nov. No. YIP02 (holotype); c) Zelkovoxylon yesimae AKKEMIK et I.POOLE sp. nov. No. HAY02 (holotype); d) Pistacioxylon ufukii AKKEMIK et I.POOLE sp. nov. No. HAY05 (holotype).