The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2024

IDNAME urn:idName:ifpni.org:genus:85186536-853F-9D4F-296D-622E1DA09B08 genus
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Rugosospermum

Genus Rugosospermum Naug. Paleontol. Zhurn., 2008, (5): 91. 2008
Name
Rugosospermum
Rank
Genus
Authors (Pub.)
Naugolnykh S. V.  
Publication
Novye semena golosemennyh iz nizhnej permi Urala [2008]
Journal
Paleontologicheskii Zhurnal
Annee/Jahrgang
2008
Issue
5
Page number
91
Year
2008
Parent Taxon
[Phylum] Cycadophyta
Fossil Status
seeds
Type
Rugosospermum callosum
Diagnosis
Small round seeds less than 5 mm in diameter, without any appendices of spermoderm. Main seed axis straight. Seed flattened. Spermoderm surface longitudinally striated, striae formed by fine ribs and furrows. The striae transformed into small depressions located near seed apex. Depression size 0.1 mm in diameter or less (in average approximately 0.05 mm in diameter). There is longitudinal fold in the middle part of the seed. The fold is represented by ovoid depression on the seed imprint, and by a rib on the seed compression. Peripherical submarginal parts of the seed flattened due to sarcotesta deformation.
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