Sonapteris barthelii

Name

Sonapteris barthelii

Rank

Species

Generic Name

[Genus] Sonapteris

Authors (Pub.)

Pšenička J. Bek J. Rössler R.  

Publication

Two new species of Sonapteris gen. nov. (Botryopteridaceae) based on compressions from the Upper Carboniferous (Bolsovian-Westphalian D) of the Pilsen Basin, Bohemian Massif [2005/10]

Journal

Review of Palaeobotany and Palynology

Volume

136

Issue

3–4

Page number

115

Year

2005

Fossil Status

foliage (fertile)

Stratigraphy

Moscovian

Strat. comment

Whetstone Horizon of the Kladno Formation, Radnice Member

Location

Brandýsek locality (near Nýřany), Pilsen Basin, Kladno District, Central Bohemian Region, Czech Republic

Paleoregion

Laurussia (Perunica)

Data for Holotypus

Repository

Západočeské muzeum, Plzeň, Czech Republic

Repository Number

F 05603

Num

Plates I, II, III, IV, V, VI

Pub.

Two new species of Sonapteris gen. nov. (Botryopteridaceae) based on compressions from the Upper Carboniferous (Bolsovian-Westphalian D) of the Pilsen Basin, Bohemian Massif [2005/10]

Diagnosis

More than 1500 sporangia tightly packed in globose-ovate fertile organs. Fertile organs alternate, 15 mm in diameter and attached to secondary pinna rachis 2.4 mm wide. Uniseriate, multicellular trichomes 2 mm long, covering all order of rachises. Epidermal cells of secondary pinna rachis polygonal and 25–50 Am in diameter. Penultimate rachises 0.4 mm wide, alternate on central rachis of sporangium mass. Ultimate rachises vary from 0.2 to 0.3 mm. Sporangia solitary placed at the end of ultimate rachises. Sporangia ovoid, 470 (560) 695 Am long, 354 (450) 541 Am wide. Apical part of sporangium (just closely above lateral annulus) consists of small thin-walled polygonal cells. The annulus is horizontally elongated, and consists of thick-walled cells. Dehiscence area consisting of a four-seriate band of thinwalled cells. Thin-walled cells of the sporangium wall are polygonal, sometimes elongated. Spores trilete, triangular to subtriangular, 33 (38.2) 43 Am in diameter, sides concave to straight. Rays of the trilete mark one-half of the radius. Finely scabrate microspinate to microgranulate laevigate exine 1 um thick.