Secrospiroxylon tolgoyense

Name

Secrospiroxylon tolgoyense

Rank

Species

Original spelling

tolgoyensis

Generic Name

[Genus] Secrospiroxylon

Authors (Name)

Cai Y.-F. Zhang H. Feng Z.  

Authors (Pub.)

Cai Y.-F. Zhang H. Feng Z. Zhang Y.-C. Yuan D.-X. Xu H.-P. Byambajav U. Yarinpuil A. Shen S.-Z.  

Publication

Secrospiroxylon tolgoyensis gen. nov. et sp. nov., a unique coniferous stem from the uppermost Permian of the South Gobi Basin, Mongolia, and its palaeoclimatic, palaeoecophysiological, and palaeoecological implications [2023/10]

Journal

Palaeontographica

Volume

305

Issue

1–4

Page number

97

Year

2023

Fossil Status

stems

Stratigraphy

Lopingian

Strat. comment

Tsaagan Tolgoy Formation

Location

Tsaagan Tolgoy, South Gobi Province, Mongolia [42° 52′ 52.8″ N, 105° 27′ 26.3″ E]

Paleoregion

Angarida (Mongolia)

Data for Holotypus

Repository

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

Repository Number

Specimen TTS301

Num

1-6

Pub.

Secrospiroxylon tolgoyensis gen. nov. et sp. nov., a unique coniferous stem from the uppermost Permian of the South Gobi Basin, Mongolia, and its palaeoclimatic, palaeoecophysiological, and palaeoecological implications [2023/10]

Diagnosis

Woody tree with eustelic stem. Pith heterocellular, with parenchyma cells, scattered secretory cells and ducts. Primary xylem strands endarch. Tracheid walls of primary xylem with annular, helical, and scalariform thickenings. Secondary xylem pycnoxylic, consisting of tracheids and parenchymatous rays. Growth rings present. Tracheid pits on the radial walls commonly uniseriate (rarely biseriate), contiguous, and occasionally spaced. Taxinean helical thickenings single, thin, and fine, at an angle of 70°– 80°. Xylem rays homocellular and uniseriate, 2 –10 cells high. Tangential bordered pits occasionally occur, uniseriate and circular. Cross-field pits cupressoid, with 1– 4 pits in each field. Axial xylem parenchyma absent.