Sistemática y paleoecología de la flora triásica de Hilario-Agua de los Pajaritos (formación El Alcázar) provincia de San Juan, Argentina
1998; Asociación Paleontológica Argentina; Volume: 35; Issue: 3 Linguagem: Inglês
ISSN
1851-8044
AutoresDaniel G. Ganuza, Alba B. Zamuner, Analía E. Artabe, Luís A. Spalletti,
Tópico(s)Plant Taxonomy and Phylogenetics
ResumoThe systematic and paIaeoecological study of the Triassic taphoflora found in El Alcazar Formation (San Juan Province) is presented. This flora is represented by Sphenophyta, Filicopsida and Gymnospermopsida corresponding to Caytoniales, Cycadales, Ginkgoales and Coniferales groups. The following taxa are determined, described and compared: Neocalamites carrerei (Zeiller) Halle, Cladophlebis mesozoica Kurtz ex Frenguelli, C. mendozaensis (Geinitz) Frenguelli, Tranquiloxylon sp. A, Pachydermophyllum praecordillerae (Frenguelli) RetaIlack, Kurtziana cacheutensis (Kurtz) Frenguelli, Yabeiella mareyesiaca (Geinitz) Oishi, Sphenobaiera robusta (Arber) Florin, Heidiphyllum elongatum (Morris) RetaIlack y Linguifolium arctum Menendez, which indicates a late Mesotriassic age. Furthermore, botanical affinity to Cycadales of Yabeiella, previously regarded as a gymnosperm incertae sedis, is proposed. Three different paIaeocommunities are reconstructed from the fossiliferous bed.
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