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Thomasostrobus
Genus Thomasostrobus Opluštil, Bek, Drábková Bull. Geosci., 84(2): 284. 30 Jun 2009
- Name
- Thomasostrobus
- Rank
- Genus
- Authors (Pub.)
- Opluštil S.
Bek J.
Drábková J.
- Publication
- A new bisporangiate lycopsid cone genus Thomasostrobus gen. nov. from the Late Pennsylvanian of the Intra-Sudetic Basin (Czech Republic) [2009/6]
- Journal
- Bulletin of Geosciences
- Volume
- 84
- Issue
- 2
- Page number
- 284
- Year
- 2009
- Parent Taxon
- [Order] Lepidocarpales
- Fossil Status
- cones
- Type
- Thomasostrobus longus
- Diagnosis
- 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.
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