Cordaites rudnicensis Šimůnek

Plant Fossil Names Registry Number: PFN000406

Act LSID: urn:lsid:plantfossilnames.org:act:406

Author: Z. Šimůnek

Rank: species

Reference: Šimůnek, Z. (2007): Genus Cordaites from the Carboniferous and Permian of the Bohemian Massif (Epidermal structure study). – Acta Musei Nationalis Pragae, Series B – Historia Naturalis 62(2006)(3–4): 97–210., link

Page of description: 115

Illustrations or figures: text-figs 1f–h, j, 17a–f; pl. 2 figs 7, 8, pl. 10

Types

Original diagnosis/description

Medium-large, lanceolate, amphistomatic leaves with rounded to blunt apices and infrequent parallel venation. Three to five thin veins alternate with each thick vein. Adaxial cuticle with oblong, square and trapezoidal cells, stomata dispersed in infrequent, poorly defined rows. Abaxial cuticle with oblong, pentagonal cells, stomata dispersed in infrequent ill-defined rows. There are 2 small rounded polar subsidiary cells, and 2 semicirculate lateral subsidiary cells.

Etymology

From the Rudník Horizon, which is the type horizon of this species.

Stratigraphy

Permian
Vrchlabí Formation, Rudník Horizon, layers 1, 7 and 9 (sensu Šimůnek, Drábková and Zajíc 1990); Permian, Lower Autunian

Locality

Czech Republic
Vrchlabí, road cut west from the town, Krkonoše Piedmont Basin