Thomasostrobus Opluštil, Bek et Drábková

Plant Fossil Names Registry Number: PFN000368


Authors: S. Opluštil, J. Bek & J. Drábková

Rank: genus

Reference: Opluštil, S., Bek, J. & Drábková, J. (2009): Anew bisporangiate lycopsid cone genus Thomasostrobus gen. nov. from the Late Pennsylvanian of the Intra-Sudetic Basin (Czech Republic). – Bulletin of Geosciences 84(2): 283–300.

Page of description: 284


Thomasostrobus longus Opluštil, Bek et Drábková

Original diagnosis/description

Bisporangiate cylindrical lycopsid strobili with lower megasporangiate and upper microsporangiate parts. Sporophylls arranged in low angle spirals. Sporangia oval, attached to adaxial surface of sporophyll pedicel along its length. Abaxial keel along length of pedicel. Microspores laevigate trilete with circular to subcircular amb and prominent labrum. Oval to circular trilete megaspores with subgula. Prominent triradiate tecta and contact area delimited on the distal surface by distinct curved ridges. Triradiate ridges and part of the contact area elevated near the apex, creating regular pyramidal triangular subgula.


In honour of Prof. Barry A. Thomas, from the University of Aberystwyth, Wales, UK, excellent palaeobotanist and friend.

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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