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Paleoecological study of the Cretaceous extremophilic flora with emphasis on xerophytes
Authors
Jana Čepičková
Publication date
1 January 2019
Publisher
Abstract
Thestudied materialcomesfromtheBohemianCretaceousBasin,Peruc-Korycany FormationCenomanianage,fromthelocalitiesPecínovandPraha-MaláChuchle. Recent plantswereusedforcomparisonwithfossilxeropyhteandmesophyteplants.Fossilandrecent materialwasmacromorphologicallydocumentedandanalyzedusingcuticularanalysis. Inthesystematic part, elevenfossiltaxafromdivisions Lyginopteridophyta, Cycadophyta,Ginkgophyta,Pinophytaand Magnoliophytaweredescribed.Fromthese,three newtaxawereestablished:bennetiteleafofZamitesmirovanaesp.nov.,angiospermleavesof Dicotylophyllumlabutae sp. nov.andD. pecinovense sp. nov. Based onthestudy of macro-and micro-morphology,it wasdistinguished whichpartofthestudied material belongstotheextremophytes.Observationsofmicromorphologyshowedthatplantsthatwere exposedto waterstress weretryingto overcome thisconstraint byadjustingtheir micromorphology. Analysingpreviouslypublishedandnewlyacquireddatahelpedtoseparatehalophytes fromotherstudiedfossiltaxa.Theseplantsfromtheenvironmentofsaltymarshesandtide- influencedswampsarecharacterisedbythickcuticle,stomataembeddedinstomatalchamber and/orsurroundedbyraisedrimsorpapillae.Theyshowvariousformsofwrinklesorpapillae ontheir externalsurface ofepidermisandarecomparativelyabundantin sediments ofthePeruc-KorycanyFormation.Theboundarybetween..
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National Repository of Grey Literature
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oai:invenio.nusl.cz:404185
Last time updated on 30/10/2019
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National Repository of Grey Literature
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oai:invenio.nusl.cz:438812
Last time updated on 07/06/2021