The floristic relationship between the upland and lowland Carboniferous wetlands of Variscan Euramerica——Evidence from some medullosalean pteridosperm fronds
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摘要
Alethopteris grandinii represents remains of fronds of a medullosalean pteridosperm(probably a small tree) that rapidly migrated across the lowland wetland habitats of Variscan Euramerica in middle Asturian(late Moscovian)times.This was probably caused by changing drainage patterns within the lowland coal swamps,in response to climate and landscape changes.However,these medullosaleans had first appeared rather earlier,in early Bolsovian(early Moscovian) times,in upland wetland habitats.These upland habitats may have pre-adapted these plants to the changed condition in the lowland coal swamps.
Alethopteris grandinii represents remains of fronds of a medullosalean pteridosperm(probably a small tree) that rapidly migrated across the lowland wetland habitats of Variscan Euramerica in middle Asturian(late Moscovian)times.This was probably caused by changing drainage patterns within the lowland coal swamps,in response to climate and landscape changes.However,these medullosaleans had first appeared rather earlier,in early Bolsovian(early Moscovian) times,in upland wetland habitats.These upland habitats may have pre-adapted these plants to the changed condition in the lowland coal swamps.
Alethopteris grandinii represents remains of fronds of a medullosalean pteridosperm(probably a small tree) that rapidly migrated across the lowland wetland habitats of Variscan Euramerica in middle Asturian(late Moscovian)times.This was probably caused by changing drainage patterns within the lowland coal swamps,in response to climate and landscape changes.However,these medullosaleans had first appeared rather earlier,in early Bolsovian(early Moscovian) times,in upland wetland habitats.These upland habitats may have pre-adapted these plants to the changed condition in the lowland coal swamps.
引文
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Cleal,C.J.2007.The Westphalian-Stephanian macrofloral record from the South Wales coalfield.Geological Magazine 144:465-486.
Cleal,C.J.2008a.Palaeofloristics of middle Pennsylvanian lyginopteridaleans in Variscan Euramerica.Palaeogeography,Palaeoclimatology,Palaeoecology261:1-14.
Cleal,C.J.2008b.Palaeofloristics of middle Pennsylvanian medullosaleans in Variscan Euramerica.Palaeogeography,Palaeoclimatology,Palaeoecology 268:164-180.
Cleal,C.J.2008c.Westphalian-Stephanian macrofloras of the southern Pennines Basin,UK.Studia Geologica Polonica 129:25-41.
Cleal,C.J.2018.The Carboniferous coal swamp floras of England:A window on an ancient tropical ecosystem.Proceedings of the Geologists'Association 129:329-351.
Cleal,C.J.,S.Oplu?til,B.A.Thomas,and Y.Tenchov.2010a.Late Moscovian terrestrial biotas and palaeoenvironments of Variscan Euramerica.Netherlands Journal of Geosciences 88:181-278.
Cleal,C.J.,S.Oplu?til,B.A.Thomas,and Y.Tenchov.2011.Late Moscovian terrestrial biotas and palaeoenvironments of Variscan Euramerica.Pennsylvanian vegetation and climate in tropical Variscan Euramerica.Episodes 34:3-12.
Cleal,C.J.,C.H.Shute,and E.L.Zodrow.1990.A revised taxonomy for Palaeozoic neuropterid foliage.Taxon 39:486-492.
Cleal,C.J.,and B.A.Thomas.1994.Plant fossils of the British Coal Measures.London:Palaeontological association(field guide to fossils 6).
Cleal,C.J.,and B.A.Thomas.1999.Tectonics,tropical forest destruction and global warming in the late Palaeozoic.Acta Palaeobotanica,Supplement 2:17-19.
Cleal,C.J.,and B.A.Thomas.2005.Palaeozoic tropical rainforests and their effect on global climates:Is the past the key to the present?Geobiology 3:13-31.
Cleal,C.J.,D.Uhl,B.Cascales-Mi?ana,B.A.Thomas,A.R.Bashforth,S.C.King,and E.L.Zodrow.2012.Plant biodiversity changes in carboniferous tropical wetlands.Earth-Science Reviews 114:124-155.
Cleal,C.J.,E.L.Zodrow,and M.Mastalerz.2010b.An association of Alethopteris foliage,Trigonocarpus ovules and Bernaultia-like pollen organs from the middle Pennsylvanian of Nova Scotia,Canada.Palaeontographica Abteilung B283:73-97.
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