New genus Schvedovia (Schvedoviales, Schvedoviacea) from the Late Permian of Central Siberia
- Authors: Sadovnikov G.N.1
-
Affiliations:
- Russian State Geological Exploration University
- Issue: Vol 109, No 5 (2024)
- Pages: 476–483
- Section: COMMUNICATIONS
- URL: https://rjmseer.com/0006-8136/article/view/666568
- DOI: https://doi.org/10.31857/S0006813624050055
- EDN: https://elibrary.ru/QJTFUR
- ID: 666568
Cite item
Abstract
Yavorskyia radczenkovii Schvedov from the Permian volcanites of Central Siberia was previously considered a cicadophyte, but differs from other species of the genus (including the type species Yavorskyia mungatica) by inclined (vs. almost perpendicular to the rachis) position of catadromous leaf segments, and veins non-parallel to their lateral edges. The structures which are probably megasporangia (on anadromous segments) and microsporangia (on catadromous segments) have been found on such leaves from the Kochumdek-5 locality in the Lower Tunguska basin. A new genus Schvedovia has been distinguished, conditionally assigned to the heterosporous ferns.
Keywords
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About the authors
G. N. Sadovnikov
Russian State Geological Exploration University
Author for correspondence.
Email: sadovnikov.gennady@yandex.ru
Russian Federation, Miklukho-Maklaya Str., 23, Moscow, 117997
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