Sclerospiroxylon xinjiangense

Name

Sclerospiroxylon xinjiangense

Rank

Species

Original spelling

xinjiangensis

Generic Name

[Genus] Sclerospiroxylon

Authors (Pub.)

Wan M. Yang W. Wang J.  

Publication

Sclerospiroxylon xinjiangensis nov. sp., a gymnospermous wood from the Kungurian (lower Permian) southern Bogda Mountains, northwestern China: systematics and palaeoecology [2018/11]

Journal

Geobios

Annee/Jahrgang

2019

Volume

52

Page number

[3] 87

Year

2018

Fossil Status

stems (wood)

Stratigraphy

Kungurian

Strat. comment

Hongyanchi Fm

Location

Turpan City, Xinjiang Uygur Autonomous Region, China

Paleoregion

Kazakhstania (Xinjiang)

Data for Holotypus

Repository

Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China

Repository Number

PB 22604, and the slides PB 22604–1 to PB 22604–9

Num

Figs. 4–7

Pub.

Sclerospiroxylon xinjiangensis nov. sp., a gymnospermous wood from the Kungurian (lower Permian) southern Bogda Mountains, northwestern China: systematics and palaeoecology [2018/11]

Diagnosis

Stem eustelic. Pith solid, circular, heterocellular, with sclerenchyma and parenchyma. Thick-walled cells showing circular patterns in the middle part of the pith. Primary xylem strands endarch to mesarch. Tracheids of primary xylem with helical and scalariform thickenings. Secondary xylem pycnoxylic, composed of tracheids and parenchymatous rays. Tracheids rounded or polygonal, sometimes squarish in transverse section. Pitting on radial walls mostly uniseriate, rarely partially biseriate. When biseriate, pits alternately arranged. Bordered pits commonly circular, rarely flattened in outline with rounded to oval apertures, continuously arranged. Rays uniseriate, 2 to 14 cells high. Ray parenchymatous cells procumbent, rectangular. Cupressoid-type cross-field pitting. Each cross-field with 2 to 7, mostly 2 to 4 pits. Cross-field pits oval to circular, bordered with circular to elliptical apertures. Axial xylem parenchyma and ray tracheids absent.