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A Small Heterophyllous Vine Climbing onPsaroniusandCordaitesTrees in the Earliest Permian Forests of North China
Psenicka, Josef1,2,3; Wang, Jun (王军)1,2,4; Hilton, Jason5,6; Zhou, Weiming1,2; Bek, Jiri7; Oplustil, Stanislav8; Frojdova, Jana Votockova7
2020-07-01
Source PublicationINTERNATIONAL JOURNAL OF PLANT SCIENCES
ISSN1058-5893
Volume181Issue:6Pages:616-645
Abstract

Premise of research. Climbing plants are important components of modern-day tropical forests and primarily comprise angiosperms, but in Paleozoic tropical forests, pteridosperms were the dominant climbers. Climbing pteridosperms are well known from the Paleozoic floras of Euramerica, while much less is known about climbing pteridosperms from other phytogeographic regions. We document from the earliest Permian Taiyuan Formation of Cathaysia a new genus and species of a small vine preserved in situ and in 3D in a volcanic tuff bed from the Wuda locality. We consider the affinity and ecology of the new plant and evaluate its abundance and distribution in the Wuda forest community. Methodology. Macrofossils were prepared by degagement, and sharpened needles were used to expose the plant from the overlying sediment. Anatomy was revealed by petrological thin sections. Key features of the plant were observed under scanning electron microscopy. Pivotal results. Only the aerial organs of the plant are known, and they comprise stems up to 4.5 mm in diameter that bear hooked prickles and fronds. Branching is irregular, probably axillary, with buds situated in axils of the stem and fronds. Stems are eustelic with well-developed secondary xylem. Lanceolate and distinctly asymmetric bipinnate fronds arise from the stem in nodes. Fronds show considerable variation in both size and shape, and pinnules are strongly heterophyllous. Large pinnules have relatively long conical pinnule lobes terminated by pads that are adapted for climbing, which we consider to be pinnule climbing adaptations. Epidermal cells on pinnules have large paracytic stomatal apparatuses. Fertile pinnules with well-developed pinnule laminae appear to have borne reproductive organs above lateral veins and between the midvein and the pinnule margin on the lower (abaxial) pinnule surface. Fertile structures are incompletely preserved and appear to represent pollen organs; seeds are unknown. Conclusions. Although its fertile organs are unknown, characters of the new plant are most similar to those of the pteridosperm family Callistophytales and in particularCallistophyton, but it is distinct from existing genera, leading to the erection ofWudaeophyton wangiigen. et sp. nov.Wudaeophyton wangiiis reconstructed as a vine climbing onPsaroniusmarattialean fern associations in the bottom of the tuff bed and onCordaitesgymnosperm associations at the top. We interpretW. wangiito most likely be a member of the Callistophytales, leading us to consider the persistence and evolutionary diversification of Callistophytales in the Cathaysian floras after their regional extirpation in Euramerica, which broadly coincided with the onset of the Permian, and their eventual extinction in the Lopingian (upper Permian) before the end-Permian mass extinction event.

Keywordseed fern gymnosperm Callistophytales Callistophyton Wudaeophyton Cathaysian flora Euramerican flora China
DOI10.1086/708814
Indexed BySCI
Language英语
WOS KeywordGUIZHOU PROVINCE ; INNER-MONGOLIA ; GROWTH HABIT ; SEED FERN ; FLORAS ; PTERIDOSPERMS ; MORPHOLOGY ; ANATOMY ; GIGANTOPTERIDALES ; PALEOECOLOGY
Funding ProjectNational Natural Science Foundation of China[41530101] ; National Natural Science Foundation of China[41802011] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB26000000] ; Visiting Professorship for Senior International Scientists of the Chinese Academy of Sciences[2016vea004] ; Grant Agency of the Czech Republic[19-06728S] ; Research Program of the Institute of Geology AS CR, v.v.i.[RVO67985831]
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000544739400005
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Visiting Professorship for Senior International Scientists of the Chinese Academy of Sciences ; Grant Agency of the Czech Republic ; Research Program of the Institute of Geology AS CR, v.v.i.
PublisherUNIV CHICAGO PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/32104
Collection中国科学院南京地质古生物研究所
Corresponding AuthorPsenicka, Josef; Wang, Jun (王军)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China
3.West Bohemia Museum Pilsen, Ctr Palaeobiodivers, Kopeckeho Sady 2, Plzen 30100, Czech Republic
4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
5.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England
6.Univ Birmingham, Birmingham Inst Forest Res, Birmingham B15 2TT, W Midlands, England
7.Czech Acad Sci, Inst Geol, Dept Paleobiol & Paleoecol, Rozvojova 269, Prague 16500 6, Czech Republic
8.Charles Univ Prague, Fac Sci, Albertov 6, Prague 12843 2, Czech Republic
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Psenicka, Josef,Wang, Jun ,Hilton, Jason,et al. A Small Heterophyllous Vine Climbing onPsaroniusandCordaitesTrees in the Earliest Permian Forests of North China[J]. INTERNATIONAL JOURNAL OF PLANT SCIENCES,2020,181(6):616-645.
APA Psenicka, Josef.,Wang, Jun .,Hilton, Jason.,Zhou, Weiming.,Bek, Jiri.,...&Frojdova, Jana Votockova.(2020).A Small Heterophyllous Vine Climbing onPsaroniusandCordaitesTrees in the Earliest Permian Forests of North China.INTERNATIONAL JOURNAL OF PLANT SCIENCES,181(6),616-645.
MLA Psenicka, Josef,et al."A Small Heterophyllous Vine Climbing onPsaroniusandCordaitesTrees in the Earliest Permian Forests of North China".INTERNATIONAL JOURNAL OF PLANT SCIENCES 181.6(2020):616-645.
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