Yuania wudensis

Name

Yuania wudensis

Rank

Species

Generic Name

[Genus] Yuania

Authors (Pub.)

Wang J. Pfefferkorn H. W. Feng Z. Shen G.-L.  

Publication

A new species of Discinites (Noeggerathiales) associated with a new species of Yuania from the Lower Permian of Inner Mongolia, China [2004/11]

Journal

International Journal of Plant Sciences

Volume

165

Issue

6

Page number

1111

Year

2004

Fossil Status

foliage

Stratigraphy

Asselian

Strat. comment

Shanxi Formation

Location

Wuda Coal District (N39°28′53′′, E106°38′08′′) near Wuda, Inner Mongolia, China

Paleoregion

Cathaysia (North)

Data for Syntypus

Repository

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

Repository Number

PB20259–20271

Num

5a–5h, 6b–6d, 7a

Pub.

A new species of Discinites (Noeggerathiales) associated with a new species of Yuania from the Lower Permian of Inner Mongolia, China [2004/11]

Diagnosis

Rachis unbranched, 4.0–8.3 mm wide and tapering gently upward to 1.0 mm or less in width. Pinnules alternate to subopposite and decurrent, with broad, obliquely clasping base. Pinnule insertion on rachis distant from each other (15 mm apart) to crowded, most crowded terminally; angles of pinnules insertion acute, ca. 45
–90
, decreasing toward frond apex. Pinnules linear to oblong, 10–45 mm long and 2.5–17 mm wide, about two to four times as long as they are wide, with the proportionately widest pinnules occurring at frond bases; pinnule tips slightly wider than bases. Pinnules overlapping or separate. Veins dense and slender, with those in the base of pinnules slightly thicker; 12–20 veins entering pinnule bases, approximately half dichotomizing within basal one-third of lamina, some dichotomizing a second time. Twenty-five to 30 veins per pinnule counted at widest part of lamina, evenly spaced, converging toward pinnule apices. Epidermal cells rectangular, 25–40 mm wide and 40–140 mm long. No stomata detected.