0546375 - GLÚ 2022 RIV NL eng J - Journal Article
Votočková Frojdová, Jana - Wang, J. - Pšenička, J. - Bek, Jiří - Opluštil, S. - Libertín, M.
A new leptosporangiate fern Oligosporangiopteris zhongxiangii gen. and sp. nov. from the lowermost Permian of Inner Mongolia, China – morphology, anatomy and reproductive organs.
Review of Palaeobotany and Palynology. Roč. 294, November (2021), č. článku 104479. ISSN 0034-6667. E-ISSN 1879-0615
R&D Projects: GA ČR(CZ) GA19-06728S
Institutional support: RVO:67985831
Keywords : Wuda * Understorey * Whole-plant concept * Cladophleboid pinnules * Oligocarpia type sporangium * In situ spores
OECD category: Paleontology
Impact factor: 2.493, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0034666721001032

This study focuses on a new leptosporangiate fern Oligosporangiopteris zhongxiangii gen. and sp. nov. from the in situ tuff flora located in the upper part of the Taiyuan Formation (lowermost Permian), Wuda coalfield, Inner Mongolia, North China. We propose a whole-plant concept based on specimens that represent various parts of the plant. Petioles of the new fern are characterized by a tangentially elongated, slightly curved, barshaped xylemstrand that has four protoxylem strands on the concave side. Protoxylemstrands occur in pairs located close to the lateral xylem ends and the xylem has endarch maturation. The pinna rachis shows a similar anatomy, whereas pinnules are of the cladophleboid type bearing Oligocarpia type of sporangia: sori consisting of 4–8 sporangia. The microspores represent the smallest in situ record of the genus Granulatisporites. Theunique combination of the rachial anatomy together with the reproductive organs with in situ spores justifies the creation of Oligosporangiopteris zhongxiangii gen. and sp. nov. In addition, the newcombination Oligocarpiawudaensis (Deng, Sun and Li) comb. nov. is proposed.
Permanent Link: http://hdl.handle.net/11104/0323775