Sonapteris

Name

Sonapteris

Rank

Genus

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

114

Year

2005

Parent Taxon

[Family] Botryopteridiaceae

Fossil Status

foliage (fertile)

Type

Sonapteris barthelii

Diagnosis

Globose fertile organ 10–17 mm in diameter, alternate on supporting rachis. Rachises covered by uniseriate trichomes; aphlebiae occur on main rachises. Fertile organs form globose-ovate features; sporangia solitary or in clusters, placed at the ends of ultimate rachises; sporangia ovoid, with short multiseriate stalk; prominent multiseriate (bi-triseriate) lateral annulus protrudes from one side of sporangia and occupies more than 1/2 length of sporangia and extending for approximately 1/2 or more of its circumference. Annulus horizontally or vertically elongated; dehiscence longitudinal, along a narrow region extending from near the pedicel to the distal region; thin-walled cells of sporangium outside dehiscence zone polygonal; circular, oval to triangular trilete spores. Exine of the proximal and distal surface can be laevigate, verrucate, microverrucate, granulate and microgranulate. The length of the trilete laesurae from one-half to three-quarters of the radius. In situ spores can be compared to some species of dispersed spore genera Granulatisporites (Ibrahim) Potonie´ and Kremp, Verrucosisporites (Ibrahim) Smith and Butterworth, Apiculatisporis Potonie´ and Kremp, Planisporites (Knox) Potonie´ and Leiotriletes (Naumova) Potonie´ and Kremp.