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Fossil woods of Lauraceae from the Ituzaingó Formation (Pliocene - Pleistocene), Paraná river basin, Argentina

2012; Museo Argentino de Ciencias Naturales Bernardino Rivadavia e Instituto Nacional de Investigación de las Ciencias Naturales; Volume: 14; Linguagem: Inglês

10.22179/revmacn.14.201

1853-0400

María Guadalupe Franco,

Paleontology and Stratigraphy of Fossils

Fossil woods of Lauraceae from the Ituzaingó Formation (Pliocene - Pleistocene), Paraná river basin, Argentina. Six fossil woods with Lauraceae affinity from the fluvial sediments of the Ituzaingó Formation were described. The specimens were found in Hernandarias and Curtiembre fossiliferous localities, in Entre Ríos, Argentina. Combination of characters present in the specimens allowed us to distinguish the Lauraceae from other dicotyledonous families and to assign them to two different fossil species: Laurinoxylon artabeae (Brea) Dupéron-Laudoueneix & Dupéron 2005 and a new genus. The Vulnerability Index (V) and Mesomorphy Ratio (M) were calculated, and they indicated that the two species were adapted to wet environments. Comparison with the nearest living relatives suggests the existence of a flora linked to a watercourse, with riparian components.