A new leptosporangiate fern .i.Oligosporangiopteris zhongxiangii./i. gen. and sp. nov. from the lowermost Permian of Inner Mongolia, China – morphology, anatomy and reproductive organs

0546375 - GLÚ 2022 RIV NL eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GA19-06728S
Institucionální podpora: RVO:67985831
Klíčová slova: Wuda * Understorey * Whole-plant concept * Cladophleboid pinnules * Oligocarpia type sporangium * In situ spores
Obor OECD: Paleontology
Impakt faktor: 2.493, rok: 2021
Způsob publikování: Omezený přístup
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.
Trvalý link: http://hdl.handle.net/11104/0323775