Two new records for the xylotaphoflora from the Las cañas Formation, Pliocene of Santiago del Estero, Argentina: Nuevos registros de Leguminosae en la Formación Las Cañas
Two silicified woods of Fabaceae (=Leguminosae) are described from the Termas de Río Hondo locality (Santiago del Estero) where the Las Cañas Formation (Pliocene) outcrops. Gleditsioxylon fiambalense and Prosopisinoxylon anciborae are recorded for the first time in this Formation. The first species...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Artículo revista |
| Lenguaje: | Español |
| Publicado: |
Facultad de Ciencias Exactas y Naturales y Agrimensura
2024
|
| Materias: | |
| Acceso en línea: | https://revistas.unne.edu.ar/index.php/fce/article/view/7773 |
| Aporte de: |
| Sumario: | Two silicified woods of Fabaceae (=Leguminosae) are described from the Termas de Río Hondo locality (Santiago del Estero) where the Las Cañas Formation (Pliocene) outcrops. Gleditsioxylon fiambalense and Prosopisinoxylon anciborae are recorded for the first time in this Formation. The first species is distinguished by having solitary vessels, in multiple radial series and rarely clusters, vasicentric to confluent axial paratracheal parenchyma, diffuse apotracheal parenchyma and helical thickenings. Gleditsioxylon was documented in Neogene formations of Catamarca, Tucumán, La Rioja and Entre Ríos (Argentina) and in the Tertiary of Montana, Washington (USA), Japan and China. P. anciborae is characterized by presenting vessels with two types of diameters, solitary, multiple radial and clusters, axial parenchyma vasicentric, aliform, confluent to banded. Prosopisinoxylon was also described for the Neogene of Entre Ríos, La Rioja and Catamarca. These taxa share the presence of diffuse porosity, septate parenchyma with rhomboidal crystals, homocellular rays with procumbent cells, alternating and vestured pits, and simple perforation plates. The components of this xylotaphoflora allow us to infer that they lived in a gallery forest with a subtropical climate. This contribution adds two other taxa to the already known lignoflora of this Formation, which is composed by a Vitaceae and Fabaceae of the genera Amburanaxylon, Paraalbizioxylon and Menendoxylon. |
|---|