Reference : The plant Leclercqia (Lycopsida) in Gondwana: implications for reconstructing Middle ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
http://hdl.handle.net/2268/13151
The plant Leclercqia (Lycopsida) in Gondwana: implications for reconstructing Middle Devonian palaeogeography
English
Meyer-Berthaud, B. [> > > >]
Fairon-Demaret, Muriel mailto [Université de Liège - ULg > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences) >]
Steemans, Philippe mailto [Université de Liège - ULg > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
Talent, J. [> > > >]
Gerrienne, Philippe mailto [Université de Liège - ULg > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
Mar-2003
Geological Magazine
Cambridge Univ Press
140
2
119-130
Yes (verified by ORBi)
International
0016-7568
New York
[en] Australia ; Devonian ; Gondwana ; Lycopsida ; palacogeography
[en] Abundant and well-preserved material of the ligulate lycopsid genus Leclercqia is reported from a new Middle Devonian locality in northeastern Queensland (Australia). The plants occur in a chert horizon in the Storm Hill Sandstone of the Dosey-Craigie Platform. Lithological data and conodont analyses combined with information from in situ spores provide an age for the plant levels ranging from Eifelian, possibly Middle Eifelian, to Early Givetian. Plant taxonomic identification is based on vegetative and fertile stems that display both external morphology and anatomy. This material represents the best documented occurrence of Leclercqia outside Laurussia and possibly the earliest in Gondwana; it provides evidence that colonization of Gondwana by the species L. complexa was contemporaneous to that of Siberia and Kazakhstan. Analysis of the distribution patterns of L. complexa suggests that it was adapted to a wide range of environments, but within certain limits which we hypothesize to be those of a climatic belt. Such considerations support previous studies using other biological data, such as faunas and palynomorphs, for reconstructing Devonian palaeogeography. They favour a close proximity of Laurussia and Gondwana rather than the occurrence of a wide ocean separating the two palaeocontinents in Middle Devonian times.
http://hdl.handle.net/2268/13151
also: http://hdl.handle.net/2268/17252

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