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Dispersal syndromes of fossil seeds from the Lower Permian of Paraná Basin, Rio Grande do Sul, Brazil.
Souza, Juliane M; Iannuzzi, Roberto.
Afiliação
  • Souza JM; Depto de Paleontologia e Estratigrafia, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil. juliane.marques.souza@gmail.com
An Acad Bras Cienc ; 84(1): 43-68, 2012 Mar.
Article em En | MEDLINE | ID: mdl-22441595
The morphological analysis of seeds has been an important subject in modern ecological studies, once it provides evidence about the biology and adaptations of the parent plant. However, this kind of study has been restricted to the ecology of modern plants and is rarely used in interpretations of Paleozoic data. From the understanding of dispersal syndromes analysis as an important tool to paleoecological reconstruction, this study provides a first approach using this tool with seeds from the Lower Permian strata of southern Paraná Basin in Rio Grande do Sul. Based on previously classified seeds and using their biological and taphonomic data, the syndrome of dispersal was interpreted, and their placement in successional groups (pioneer, early-successional and later-successional) was suggested. Seven morphospecies were analyzed: Samaropsis gigas, representing a later-successional species living in water bodies with hydrochory as its dispersal syndrome; Samaropsis kurtzii, typical of early-successional species showing anemochory as its dispersal syndrome and living in distal areas in relation to water bodies; Samaropsis aff. S. millaniana, Cordaicarpus aff. C. brasilianus, Cordaicarpus cerronegrensis and Cordaicarpus truncata have typical characteristics of pioneer plants, exhibiting barochory as their primary dispersal syndrome with other syndromes associated.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Sementes / Cycadopsida / Dispersão de Sementes / Fósseis País/Região como assunto: America do sul / Brasil Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Sementes / Cycadopsida / Dispersão de Sementes / Fósseis País/Região como assunto: America do sul / Brasil Idioma: En Revista: An Acad Bras Cienc Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil