Discosoropteris chlupata

Name

Discosoropteris chlupata

Rank

Species

Original spelling

chlupatum

Generic Name

[Genus] Discosoropteris

Authors (Pub.)

Pšenička J. Zhou W.-M. Boyce C. K. Votočková Frojdová J. Bek J. Opluštil S. Wang J.  

Publication

Two new leptosporangiate ferns from in situ volcanic ash of the Whetstone Horizon (Kladno Formation, Pennsylvanian), Pilsen Basin, Czech Republic [2022/1]

Journal

Review of Palaeobotany and Palynology

Volume

299

Issue

104608

Page number

2

Year

2022

Fossil Status

foliage (fertile)

Stratigraphy

Moscovian

Strat. comment

Kladno Formation

Location

Doubrava locality (near Nýřany), Pilsen Basin, Plzeň Region, Czech Republic

Paleoregion

Laurussia (Perunica)

Data for Holotypus

Repository

Západočeské muzeum, Plzeň, Czech Republic

Repository Number

F4

Num

1: 1-7

Pub.

Two new leptosporangiate ferns from in situ volcanic ash of the Whetstone Horizon (Kladno Formation, Pennsylvanian), Pilsen Basin, Czech Republic [2022/1]

Data for Paratypus

Repository

Západočeské muzeum, Plzeň, Czech Republic

Repository Number

F2357 [pl. II: 1-5] – well preserved vegetative or sterile pinnules; F5885 [pl. II: 6-8] – preserved attached penultimate rachides to antepenultimate rachis

Num

II: 1-8

Pub.

Two new leptosporangiate ferns from in situ volcanic ash of the Whetstone Horizon (Kladno Formation, Pennsylvanian), Pilsen Basin, Czech Republic [2022/1]

Diagnosis

Frond at least tripinnate. Rachis densely covered by multicellular uniseriate trichomes across all orders. Trichomes from antepenultimate and penultimate rachises tend to clump into bundles. Penultimate rachis has C-shaped xylem band. Tracheids with scalariform wall thickenings and reticulate pitting. Fertile and vegetative pinnules of the same shape and size. Three to four sterile pinnules are proximal in each fertile ultimate pinna. Pinnules elongately oval, constricted at the base, and separated into 6–7 lobes with the largest lobe on the acroscopic side; their alternate insertion is perpendicular on the ultimate rachis. Margin gently dentate. Midvein prominent and nearly straight over proximal half of pinnule. Secondary veins bifurcate twice or three times, terminating individually in marginal teeth. Pinnules bearing uniseriate multicellular trichomes on both pinnule sides. Cuticle - adaxial side: Cells of costal field oval or brick-shaped and cells of intercostal field tetragonal having undulate anticlinal walls. Cuticle - abaxial side: Cells of costal field elongate and tetra-polygonal having straight anticlinal walls. Papillae present on abaxial side irregularly scattered over the entire surface with a higher concentration around trichome bases and stomata. Anomocytic stomata irregularly scattered over the intercostal field.