Henanotheca qingyunensis Yu.Guo, Y.Zhou et Z.Feng in Guo, Zhou, Pšenička, Bek, Votočková Frojdová & Feng

Plant Fossil Names Registry Number: PFN003175

Act LSID: urn:lsid:plantfossilnames.org:act:3175

Authors: Y. Guo, Y. Zhou & Z. Feng

Rank: species

Reference: Guo, Y., Zhou, Y., Pšenička, J., Bek, J., Votočková Frojdová, J. & Feng, Z. (2024): Henanotheca qingyunensis sp. nov., a filicalean fern from the Lopingian of Southwest China. – Palaeontographica Abteilung B-Palaeophytologie Palaeobotany-Palaeophytology 305(5–6): 193–210.

Page of description: 196

Illustrations or figures: figs 2-5

Types

Original diagnosis/description

Fronds at least once pinnate. Pinnules alternately and closely arranged, 1.4–8.0 mm long and 0.9–3.3 mm wide, ovate to lanceolate, with contracted bases, rounded apexes, and alternately deeply lobed margins. Lobe number per pinnule 2–8 (1–4 pairs), varying with pinnule length. Midvein distinct, thin, extending from base to apex. Pinnules sphenopteroid-type. Sporangia abaxially attached, annulate, ovoidal to ellipsoid, 220–300 μm in diameter, and irregularly grouped. Sporangial groups scattered on each pinnule lobe. Transverse annuli individually bearing two to three rows of thick-walled cells and encircling half perimeter of each sporangium. Annulus cells elongated to tetragonal/polygonal. Ordinary cells of the sporangial wall polygonal and thin-walled. Trilete triangular spores, radial area wavily rounded, inter-radial region concave, labrum sometimes developed, and microgranulate to microverrucate sculpture slightly thickened on both surfaces.

Etymology

The specific epithet is derived from the Qingyun coal mine, where the plant was collected.

Stratigraphy

Permian, Lopingian
Xuanwei Formation

Locality

China
Fuyuan County, Qujing City, Yunnan Province