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CONICET Digital
Article . 2012
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Asociación de briofitas de la Formación La Cantera, Aptiano tardío, Cuenca de San Luis, Argentina

Authors: Puebla, Gabriela Griselda;

Asociación de briofitas de la Formación La Cantera, Aptiano tardío, Cuenca de San Luis, Argentina

Abstract

La Formación La Cantera (Cretácico Temprano) ha brindado una importante microflora asociada a una diversa macroflora, ambas obtenidas de su localidad tipo, expuesta en la Sierra del Gigante, Cuenca de San Luis, centro-oeste de Argentina. Se ilustran y describen esporas de los géneros Aequitriradites (Delcourt y Sprumont) emend Cookson y Dettmann y Couperisporites Pocock, junto a diversos morfotipos vegetales correspondientes al grupo de las Briofitas, recuperadas de los mismos niveles fosilíferos, aunque no en conexión orgánica. Como resultado de este nuevo análisis, de la asociación vegetal fósil obtenida (esporas dispersas y macrorrestos), se deduce un evidente predominio de esporas y megaflora con afinidad a las hepáticas, entre las briofitas. El hecho de encontrar esporas y macrorrestos de briofitas en su mayoría pertenecientes al grupo de las hepáticas, y también de especímenes que corresponderían a musgos, es indicativo del desarrollo in situ (no hay evidencias de transporte) de este grupo de plantas bajo condiciones de humedad local, en un cuerpo de agua dulce desarrollado en ese sector de la Cuenca de San Luis, durante el Aptiano tardío.

The La Cantera Formation (Early Cretaceous) has yielded an important palynoflora associated to a diverse macroflora; both recovered from rocks exposed at its type locality in the Sierra del Gigante, San Luis Basin, central-western Argentina. Spores of the genera Aequitriradites (Delcourt and Sprumont) emend. Cookson and Dettmann and Couperisporites Pocock are described and illustrated together with diverse plant morphotypes recovered from the same fossiliferous levels and belonging to Bryophyta, albeit not in organic connection. This new analysis of the fossil plant association (disperse spores and macroscopic remains) reveals a dominance of spores and megaflora with hepatic affinity within the bryophytes. The occurrence of spores and macroremains of hepaticae and mosses in the same sediments suggests the in situ development of this group of plants (there is no evidence of transport). They grew in this part of the San Luis Basin during the Aptian under local wet conditions related to a fresh water body.

Fil: Puebla, Gabriela Griselda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina

Country
Argentina
Keywords

SAN LUIS, https://purl.org/becyt/ford/1.5, APTIANO TARDÍO, https://purl.org/becyt/ford/1, BRIOFITAS, FORMACIÓN LA CANTERA

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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