Gymnospermous woods from tres islas formation (lower permian) Uruguay
DOI:
https://doi.org/10.4013/5058Abstract
Woods of Palaeozoic pycnoxylic gymnosperms from the Tres Islas Formation, Lower Permian of Uruguay, are analyzed for the first time and correlated with those preserved in other Gondwana land masses between the end of Paleozoic and Mesozoic. The following taxa are identified and discussed: Agathoxylon allani (Krausel) Crisafulli and Herbst nov. comb.; A. kurmarpurensis (Bajpai and Singh) Crisafulli and Herbst; Australoxylon teixeirae Marguerier; A. acevedoe Crisafulli and Herbst nov. sp.; Chapmanoxylon jamuriense (Maheshwari) Pant and Singh; Polysolenoxylon bageense Guerra and Prototaxoxylon brasilianum Krausel and Dolianiti. The fossil wood shows a typical radial wall pitting of araucarioid-type what is in agree with the Permian age inferred to the Tres Islas Formation. The growth ring analysis allows to the inference of a wet favorable climate during the time of deposition.
Key words: wood anatomy, gymnosperms, Permian, Uruguay.Downloads
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