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.i.Szea yunnanensis./i. sp. nov., a new leptosporangiate fern from the Lopingian of Southwest China
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SYSNO ASEP 0578245 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Szea yunnanensis sp. nov., a new leptosporangiate fern from the Lopingian of Southwest China Tvůrce(i) Guo, Y. (CN)
Zhou, Y. (CN)
Pšenička, J. (CZ)
Bek, Jiří (GLU-S) RID, SAI, ORCID
Votočková Frojdová, Jana (GLU-S) RID, SAI, SAI
Feng, Z. (CN)Číslo článku 105022 Zdroj.dok. Review of Palaeobotany and Palynology. - : Elsevier - ISSN 0034-6667
Roč. 320, January (2024)Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Sori ; Annulate sporangia ; In situ spores ; Cladophleboid pinnules ; Late Permian ; Cathaysian Flora Obor OECD Paleontology CEP GA19-06728S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 UT WOS 001119157400001 EID SCOPUS 85177195592 DOI 10.1016/j.revpalbo.2023.105022 Anotace A new species of adpressed leptosporangiate fern, Szea yunnanensis sp. nov., is described from the Xuanwei Formation (upper Permian) of Yunnan Province, Southwest China. Fronds of this new species are at least bipinnate, with suboppositely to alternately arranged cladophleboid pinnules. Fertile pinnules are triangular to falcate shaped and show slightly decurrent entire bases, acute apices, and proximally lobed margins. Sporangia are grouped into abaxial sori arranged in one row on each side of the midvein from the basal to the 1/2–2/3 portion of the pinnule. The number of sori per row varies from one to four. Sori are exindusiate, ovoid/ellipsoid, with a diameter of 1.3 mm on average, and each consists of approximately 25 sporangia. Sporangia with biseriate annuli are ovoid or ellipsoid, approximately 330 μm long and 230 μm wide, and each produces approximately 100 or more spores. Sporangial walls have one layer of polygonal/elongated cells. Trilete auriculate in situ spores of the Triquitrites-type have verrucate-rugulate-reticulate sculpture. The exine is 2–3 μm thick and without identifiable layers. The family relationship of Szea may belong to the Gleicheniaceae or Sermayaceae, but the combination of sporangium and spore characteristics of Szea inclines us to place this genus among Incertae Sedis. The family relationships of Chansitheca, Henanotheca, and Oligocarpia which were originally affiliated with the Gleicheniaceae are also questionable. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0034666723001914
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