Botryopteridium sinense

Name

Botryopteridium sinense

Rank

Species

Original spelling

sinensis

Generic Name

[Genus] Botryopteridium

Authors (Pub.)

Zhou W.-M. Pšenička J. Bek J. Libertín M. Wang S.-J. Wang J.  

Publication

A new species of Botryopteridium Doweld from the early Permian Wuda Tuff Flora and its evolutionary significance [2023/1]

Journal

Review of Palaeobotany and Palynology

Volume

311

Issue

104849

Page number

2

Year

2023

Fossil Status

foliage (fertile)

Stratigraphy

Asselian

Strat. comment

Upper part of the Taiyuan Formation

Location

Wuda Coalfield, Inner Mongolia, P.R. China

Paleoregion

Angarida (Mongolia)

Data for Holotypus

Repository

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

Repository Number

PB24618

Num

Plate I, 1–2; Plate II, 4, 6; Plates III–VII

Pub.

A new species of Botryopteridium Doweld from the early Permian Wuda Tuff Flora and its evolutionary significance [2023/1]

Data for Paratypus

Repository

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

Repository Number

PB24619–PB24622

Num

Plate I, 3–6; Plate II, 1–3, 5, 7, 8; Plate VIII

Pub.

A new species of Botryopteridium Doweld from the early Permian Wuda Tuff Flora and its evolutionary significance [2023/1]

Diagnosis

Frond tripinnate. Penultimate pinnae suboppositely arranged. Ultimate pinnae alternately arranged. Pinnules oval to triangular. Fertile pinnules strongly involute. Pinnule midvein weak. Pinnule lateral vein sparse, unforked or bifurcated once. Pinnule epidermis with differing costal and intercostal cells. Costal cells elongated, regularly arranged. Intercostal cells oval, irregularly arranged. Six to ten sporangia grouped into a sorus by receptacle. Sporangia sub-spheroidal, stalked. Annulus composed of two horizontal rows of longitudinally elongated thick-walled cells, occupying half of sporangium circumference. Stomium made up of six to eight columns of longitudinally elongated thin-walled cells. Remaining area made up of small polygonal thick-walled cells. Trilete microspores with triangular to circular amb. Sculpture baculate. Rays reaching two-thirds to threequarters of the radius. Foliar trace rake-like, with up to eight median xylary ridges. Xylary ridges composed of mixed metaxylem and protoxylemtracheids. Metaxylem tracheidswith scalariform pitting.Midvein and lateral veins with oval to triangular xylem strand.