Artículo
Early seed plants from western Gondwana: Palaeobiogeographical and ecological implications based on Tournaisian (Lower Carboniferous) records from Argentina
Prestiani, C; Rustán, Juan José
; Balseiro, Diego
; Vaccari, Norberto Emilio
; Sterren, A.F.; Steemans, P.; Rubinstein, C.V.; Astini R.A.
Fecha de publicación:
10/2015
Editorial:
Elsevier Science
Revista:
Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN:
0031-0182
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The oldest seed occurrences in Western Gondwana have been recognized in a new stratigraphic section locatedin Western Argentina (Precordillera Basin). Palynological evidence indicates an Early Mississippian (probablyTournaisian) age for this new succession. The two identified early seeds generas, Pseudosporogonites cf. halleiand Warsteinia sancheziae n. sp. were up to now considered as restricted to the Devonian of Laurussia. This findingsuggests a dispersal of earliest spermatophytes between Laurussia and Gondwana during Devonian/Tournaisian times, thus accounting for the Rheic Ocean as a surmountable biogeographic barrier for continentalbiotas. Alternatively, contrasting biogeographic hypotheses dealing with early spermatophytes rising inpaleotropics and then displacing herbaceous communities of non-spermatophytes typical from cool high latitudinalregions, are explored for explaining the recognized paleobiogeographical pattern. The new informationsupports a weak impact of the Devonian/Carboniferous biotic crisis on earliest seed plant diversity. Based on preliminaryevidences of niches differentiation and ecological dynamics probably affected by wildfires, TournaisianGondwanan plant communities from high latitudes are interpreted as being more complex than previouslythought, and more similar to those reported from Laurussia. In addition, their discovery in a sedimentary environmentassociated to glacigenic deposits, show that this new record might be linked to the coeval glacial agewidely recorded elsewhere in Gondwana.
Palabras clave:
Paleobiogeografia
,
Paleobotanica
,
Estratigrafia
,
Carbonifero
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Identificadores
Colecciones
Articulos(CICTERRA)
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Citación
Prestiani, C; Rustán, Juan José; Balseiro, Diego; Vaccari, Norberto Emilio; Sterren, A.F.; et al.; Early seed plants from western Gondwana: Palaeobiogeographical and ecological implications based on Tournaisian (Lower Carboniferous) records from Argentina; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 417; 10-2015; 210-219
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