globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.10.039
论文题名:
Early seed plants from Western Gondwana: Paleobiogeographical and ecological implications based on Tournaisian (Lower Carboniferous) records from Argentina
作者: Prestianni C.; Rustán J.J.; Balseiro D.; Vaccari E.; Sterren A.F.; Steemans P.; Rubinstein C.; Astini R.A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 417
起始页码: 210
结束页码: 219
语种: 英语
英文关键词: Argentina ; Carboniferous ; Gondwana ; Paleogeography ; Spermatophytes
英文摘要: The oldest seed occurrences in Western Gondwana have been recognized in a new stratigraphic section located in Western Argentina (Precordillera Basin). Palynological evidence indicates an Early Mississippian (probably Tournaisian) age for this new succession. The two identified early seeds generas, Pseudosporogonites cf. hallei and Warsteinia sancheziae n. sp. were up to now considered as restricted to the Devonian of Laurussia. This finding suggests 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 continental biotas. Alternatively, contrasting biogeographic hypotheses dealing with early spermatophytes rising in paleotropics and then displacing herbaceous communities of non-spermatophytes typical from cool high latitudinal regions, are explored for explaining the recognized paleobiogeographical pattern. The new information supports a weak impact of the Devonian/Carboniferous biotic crisis on earliest seed plant diversity. Based on preliminary evidences of niches differentiation and ecological dynamics probably affected by wildfires, Tournaisian Gondwanan plant communities from high latitudes are interpreted as being more complex than previously thought, and more similar to those reported from Laurussia. In addition, their discovery in a sedimentary environment associated to glacigenic deposits, show that this new record might be linked to the coeval glacial age widely recorded elsewhere in Gondwana. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69110
Appears in Collections:过去全球变化的重建

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作者单位: Paleontology Department, Royal Belgian Institute of Natural Sciences, Rue Vautier 29, Brussels, Belgium; Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET-Universidad Nacional de Córdoba, Ciudad Universitaria, Edificio CICTERRA Av. Vélez Sarsfield 1611, Córdoba, Argentina; Centro de Investigaciones Paleobiológicas (CIPAL), FCEFyN, Universidad Nacional de Córdoba, Av. Velez Sarsfield 299, Córdoba, Argentina; Universidad Nacional de La Rioja, Av. René Favaloro s/n 5300, La Rioja, Argentina; Unité de Paléobiogéologie, Paléopalynologie et Paléobotanique, Dpt. de Géologie, Université de Liege, B18/P40 Boulevard du Rectorat, Liege, Belgium; Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA): CCT CONICET-Mendoza, Av. Ruiz Leal s/n, Parque General San Martín, Mendoza, Argentina

Recommended Citation:
Prestianni C.,Rustán J.J.,Balseiro D.,et al. Early seed plants from Western Gondwana: Paleobiogeographical and ecological implications based on Tournaisian (Lower Carboniferous) records from Argentina[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,417
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