First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)

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First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina). The Chaco region is a vast sedimentary basin covered by Quaternary sediments. The vegetation changes from xeromorphic forest and thickets in the Western Chaco to semideciduous forest in...

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Autores principales: Contreras, Silvina A., Lutz, Alicia I
Formato: Artículo revista
Lenguaje:Español
Publicado: Sociedad Argentina de Botánica 2014
Materias:
Chaco Oriental
Equisetites
Holoceno
Impresiones
Eastern Chaco
Holocene
Impressions.
Acceso en línea:https://revistas.unc.edu.ar/index.php/BSAB/article/view/9469
Aporte de:
Revistas de la UNC de Universidad Nacional de Córdoba
id I10-R10article-9469
record_format ojs
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-10
container_title_str Revistas de la UNC
language Español
format Artículo revista
topic Chaco Oriental
Equisetites
Holoceno
Impresiones
Eastern Chaco
Equisetites
Holocene
Impressions.
spellingShingle Chaco Oriental
Equisetites
Holoceno
Impresiones
Eastern Chaco
Equisetites
Holocene
Impressions.
Contreras, Silvina A.
Lutz, Alicia I
First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)
topic_facet Chaco Oriental
Equisetites
Holoceno
Impresiones
Eastern Chaco
Equisetites
Holocene
Impressions.
author Contreras, Silvina A.
Lutz, Alicia I
author_facet Contreras, Silvina A.
Lutz, Alicia I
author_sort Contreras, Silvina A.
title First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)
title_short First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)
title_full First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)
title_fullStr First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)
title_full_unstemmed First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina)
title_sort first records of equisetites sp. (equisetaceae) in quaternary sediments on the bermejo river (formosa, argentina)
description First records of Equisetites sp. (Equisetaceae) in quaternary sediments on the Bermejo River (Formosa, Argentina). The Chaco region is a vast sedimentary basin covered by Quaternary sediments. The vegetation changes from xeromorphic forest and thickets in the Western Chaco to semideciduous forest intermingled with extensive palm-savannas in the Eastern Chaco. In the Eastern Chaco, different Holocene impressions of plants appear in the banks of the Bermejo River (Villa Escolar, Formosa). Equisetites Sternberg. impressions occur in these sediments, and could prove useful to reconstruct the kind of past vegetation in the Eastern Chaco. We analyzed five morphological variables in a total of 12 fossil stems. The stems showed the typical articulation of Equisetaceae, with 9 to 16 carinals and 5 to 8 traces of lateral branches. Then, fossils were compared with the native extant species: E. bogotense H. B. K. and E. giganteum L. using multivariate methods. Due to their characteristics, the impressions showed a greater similarity to E. giganteum, being the first record of impressions for the Eastern Chaco region. The presence of this species showed that the environment in the recent past was humid like the present.
publisher Sociedad Argentina de Botánica
publishDate 2014
url https://revistas.unc.edu.ar/index.php/BSAB/article/view/9469
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